Atex guidelines en

DG ENTERPRISE AND INDUSTRY
European Commission

ATEX GUIDELINES

GUIDELINES ON THE APPLICATION OF
DIRECTIVE 94/9/EC OF THE EUROPEAN
PARLIAMENT AND THE COUNCIL OF 23 MARCH
1994 ON THE APPROXIMATION OF THE LAWS OF
THE MEMBER STATES CONCERNING EQUIPMENT
AND PROTECTIVE SYSTEMS INTENDED FOR USE
IN POTENTIALLY EXPLOSIVE ATMOSPHERES

4TH EDITION – September 2012

NOTES

1. These Guidelines are intended to be a manual for all parties directly or indirectly affected by
Directive 94/9/EC, commonly referred to as ATEX ("Atmosphères Explosibles") Products
Directive. Readers' attention is drawn to the fact that this guide is intended only to facilitate
the application of Directive 94/9/EC and it is the relevant national transposition of the text of
the Directive which is legally binding. However, this document does represent a reference
for ensuring consistent application of the Directive by all stakeholders. The Guidelines are
intended to help ensure the free movement of products1 in the European Union2 by consensus
amongst Member States' government experts and other parties concerned.

2. These Guidelines have been prepared by the competent services of the Directorate General
Enterprise and Industry of the European Commission in collaboration with Member States,
European industry, European standardisation and Notified Bodies.

3. The European Commission services will undertake to maintain this Guide. It is our goal to
ensure that the information provided is both timely and accurate. If errors are brought to our
attention, we will try to correct them. However the Commission accepts no responsibility or
liability whatsoever with regard to the information in this Guide.

This information is:

• of a general nature only and is not intended to address the specific circumstances of any
particular individual or entity;

• not necessarily comprehensive, complete, accurate or up to date;

• sometimes refers to external information over which the Commission services have no
control and for which the Commission assumes no responsibility;

• not professional or legal advice.

4. All references to the CE marking and EC Declaration of Conformity in this Guide relate only
to the Directive 94/9/EC. To place products falling under Directive 94/9/EC on the market in
the EU territory all other relevant legislation must be applied.

5. Further guidance, especially concerning specific type of products, can be found on the
Commission's website on EUROPA:
http://ec.europa.eu/enterprise/sectors/mechanical/documents/guidance/atex/index_en.htm.

1
For the purpose of this guide the term "product" covers equipment, protective systems, safety,
controlling and regulating devices, components and their combinations as they are defined in
Directive 94/9/EC.
2
According to the agreement related to the European Economic Area (EEA) (Council and Commission
Decision 94/1/EC of 13 December 1993 (OJ L 1, 3.1.1994, p. 1) the territories of Liechtenstein,
Iceland and Norway have to be considered, for the implementation of Directive 94/9/EC, in the same
right as of the EU territory. When this term, EU territory, is used in this guide, the same applies to the
EEA territory.

Note to the 4th Edition – September 2012

This 4th Edition – September 2012 is the last edition of the ATEX Guidelines on the application of
Directive 94/9/EC. On 21 November 2011 the Commission issued a Proposal for a Directive of the
European Parliament and of the Council on the harmonisation of the laws of the Member States
relating to equipment and protective systems intended for use in potentially explosive
atmospheres3, within the New Legislative Framework (NLF) alignment package, in order to align
the European legislation on ATEX to Decision No 768/2008/EC establishing a common
framework for the marketing of products4.

The Proposal is currently under discussion at the European Parliament and the Council and its
final approbation is expected by the end of 2012 or beginning of 2013. When the text of the new
aligned ATEX Directive is available, new adapted and restructured ATEX Guidelines will be
drafted, in view of entry into force of the new legislation.

3
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=COM:2011:0772:FIN:en:PDF.
4
Decision No 768/2008/EC of the European Parliament and of the Council of 9 July 2008 on a
common framework for the marketing of products, and repealing Council Decision 93/465/EEC (OJ L
218, 13.8.2008, p. 82).

TABLE OF CONTENTS

1 INTRODUCTION ................................................................................................................. 9

2 OBJECTIVE OF THE ATEX DIRECTIVE 94/9/EC.......................................................... 10

3 GENERAL CONCEPTS...................................................................................................... 11
3.1 Placing ATEX products on the market ..................................................................... 11
3.2 Putting ATEX products into service......................................................................... 12
3.3 Manufacturer............................................................................................................. 12
3.3.1 Use of subcontractor services by a manufacturer .................................... 13
3.3.2 Conformity Assessment Procedures based on quality assurance
(Annex IV, Annex VII)............................................................................ 13
3.4 Manufacturing of ATEX products for own use ........................................................ 14
3.5 Authorised representative ......................................................................................... 14
3.6 Other persons responsible for placing on the market................................................ 14
3.7 Equipment................................................................................................................. 15
3.7.1 Potentially explosive atmosphere............................................................. 15
3.7.2 "Own" ignition source.............................................................................. 15
3.7.3 Non-Electrical Equipment ....................................................................... 16
3.7.4 Electrical Equipment................................................................................ 17
3.7.5 Assemblies ............................................................................................... 17
3.8 Protective Systems.................................................................................................... 21
3.9 Components .............................................................................................................. 21
3.10 Safety, controlling or regulating devices as defined in Article 1.2........................... 23

4 IN WHICH CASES DOES DIRECTIVE 94/9/EC APPLY? .............................................. 25
4.1 ATEX Analysis......................................................................................................... 25
4.1.1 What is a potentially explosive atmosphere in the sense of
Directive 94/9/EC? .................................................................................. 25
4.1.2 Which kinds of products are covered by Directive 94/9/EC?.................. 26
4.2 Defining group and category .................................................................................... 32
4.2.1 Group I..................................................................................................... 32
4.2.2 Group II ................................................................................................... 33
4.2.3 Levels of Protection for various Categories of Equipment...................... 34
4.3 Risk Assessment for Products................................................................................... 34

5 EQUIPMENT NOT IN THE SCOPE OF DIRECTIVE 94/9/EC........................................ 36
5.1 Exclusions based on Article 1.4 of Directive 94/9/EC ............................................. 36
5.2 Examples for equipment not covered by Directive 94/9/EC .................................... 36
5.2.1 "Simple" products .................................................................................... 36
5.2.2 Installations.............................................................................................. 37

6 APPLICATION OF DIRECTIVE 94/9/EC ALONGSIDE OTHERS THAT MAY
APPLY................................................................................................................................. 39
6.1 Electromagnetic Compatibility 2004/108/EC (EMC)............................................... 39
6.2 Low Voltage 2006/95/EC (LVD) ............................................................................. 39
6.3 Machinery 2006/42/EC (MD)................................................................................... 39
6.4 Transport of dangerous goods by road 94/55/EC and 98/91/EC (ADR) .................. 39
6.5 Personal Protective Equipment 89/686/EEC (PPE).................................................. 41
6.6 Pressure Equipment 97/23/EC (PED)....................................................................... 41
6.7 Simple Pressure Vessels 87/404/EEC....................................................................... 42
6.8 Gas Appliances 90/396/EEC (GAD) ........................................................................ 42

6.9 Construction Products 89/106/EEC (CPD)............................................................... 42
6.10 Marine Equipment Directive 96/98/EC (MED)........................................................ 42

7 USED, REPAIRED OR MODIFIED PRODUCTS AND SPARE PARTS ....................... 43
7.1 General...................................................................................................................... 43
7.2 Definitions ................................................................................................................ 43
7.3 Reconditioned (or refurbished) products .................................................................. 43
7.4 Reconfigured products.............................................................................................. 44
7.5 Substantially modified products ............................................................................... 44
7.6 Repaired products ..................................................................................................... 44
7.7 Spare parts ................................................................................................................ 44

8 CONFORMITY ASSESSMENT PROCEDURES.............................................................. 45
8.1 Products conforming to Directive 94/9/EC............................................................... 45
8.2 Exceptional derogations of the Conformity Assessment Procedures ....................... 49

9 NOTIFIED BODIES............................................................................................................ 50
9.1 Designation ............................................................................................................... 50
9.2 Co-ordination and Co-operation ............................................................................... 50
9.3 Subcontracting .......................................................................................................... 51
9.4 Retention of documentation...................................................................................... 51
9.5 Notified Bodies having knowledge of faulty products* on the market .................... 52

10 DOCUMENTS OF CONFORMITY ................................................................................... 53
10.1 Documents issued by the manufacturer .................................................................... 53
10.1.1 EC Declaration of Conformity................................................................. 53
10.1.2 Written Attestation of Conformity for components ................................. 54
10.1.3 Documents accompanying the product .................................................... 54
10.1.4 Retention of documentation - Quality assurance ..................................... 55
10.1.5 Acceptance of test results of manufacturers by a Notified Body............. 55
10.2 Documents issued by the Notified Body .................................................................. 56
10.2.1 Minimum content of a European standardised ATEX Test and
Assessment Report................................................................................... 57
10.3 EC-Type Examination Certificate and the responsibilities of stakeholders.............. 58

11 MARKING .......................................................................................................................... 60
11.1 CE Marking .............................................................................................................. 60
11.2 Supplementary/Specific Marking ............................................................................. 61
11.3 Additional marking for standards ............................................................................. 63
11.4 Marking of components ............................................................................................ 63
11.5 Marking of small products........................................................................................ 64
11.6 Marking of assemblies .............................................................................................. 64

12 SAFEGUARD CLAUSE AND PROCEDURE................................................................... 66

13 EUROPEAN HARMONISED STANDARDS.................................................................... 68
13.1 European Harmonised Standards published in the Official Journal ......................... 68
13.2 Standardisation Programme ...................................................................................... 68

14 USEFUL WEBSITES .......................................................................................................... 70

ANNEX I: SPECIFIC MARKING OF EXPLOSION PROTECTION (εx) DRAWN
FROM DIRECTIVE 84/47/EEC ......................................................................................... 71

ANNEX II: BORDERLINE LIST - ATEX PRODUCTS............................................................... 73

-9-

1 INTRODUCTION
The objective of these Guidelines is to clarify certain matters and procedures referred to in
Directive 94/9/EC5 concerning equipment and protective systems intended for use in potentially
explosive atmospheres. The Guidelines should be used in conjunction with the Directive and with
the European Commission's "Guide to the implementation of directives based on New Approach
and Global Approach (Blue Guide)"6.

These Guidelines are not only for the use of Member States’ competent authorities, but also by the
main economic operators concerned, such as manufacturers, their trade associations, bodies in
charge of the preparation of standards as well as those entrusted with the conformity assessment
procedures.

First and foremost, this document must ensure that, when correctly applied, the Directive leads to
the removal of obstacles and difficulties related to the free circulation (free movement) of goods
within the European Union (see footnote 2). It should be noted that the statements in these
Guidelines refer only to the application of Directive 94/9/EC unless otherwise indicated. All
parties concerned should be aware of other requirements, which may also apply (see chapter 6).

Directive 94/9/EC is a "New Approach" directive laying down Essential Health and Safety
Requirements and leaving it to standards, primarily European harmonised standards, to give
technical expression of the relevant requirements contained in the Directive.

Directive 94/9/EC is a total harmonisation directive, i.e. its provisions replace existing divergent
national and European legislation which cover the same subjects as stipulated by Directive
94/9/EC.

As of 1 July 2003, all other relevant national regulations have been abolished and Directive
94/9/EC, as transposed into the national legislation of the Member States, is the sole legal
instrument applicable.

"Use" Directives

The reader will want to be aware that where ATEX products are intended for use in a place of
work, national and community legislation, intended to ensure the safety of employees will usually
apply. In this respect different legislation applies to land based industries, the underground
extraction of coal and other minerals, and offshore oil production7.

5
Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the
approximation of the laws of the Member States concerning equipment and protective systems
intended for use in potentially explosive atmospheres (OJ L 100, 19.4.1994, p. 1). Amended by
Regulation (EC) No 1882/2003 of the European Parliament and of the Council of 29 September 2003
(OJ L 284, 31.10.2003, p. 1). Corrected by Corrigendum OJ L 21, 26.1.2000, p. 42; and by
Corrigendum OJ L 304, 5.12.2000, p. 19.
6
http://ec.europa.eu/enterprise/policies/single-market-goods/documents/blue-guide.
7
Directive 1999/92/EC of the European Parliament and of the Council of 16 December 1999 on
minimum requirements for improving the safety and health protection of workers potentially at risk
from explosive atmospheres (15th individual Directive within the meaning of Article 16(1) of
Directive 89/391/EEC) (OJ L 023 , 28.1.2000, p. 57).
Council Directive 92/91/EEC of 3 November 1992 concerning the minimum requirements for
improving the safety and health protection of workers in the mineral-extracting industries through
drilling (eleventh individual Directive within the meaning of Article 16 (1) of Directive 89/391/EEC)
(OJ L 348, 28.11.1992, p. 9).
Council Directive 92/104/EEC of 3 December 1992 on the minimum requirements for improving the
safety and health protection of workers in surface and underground mineral-extracting industries
(twelfth individual Directive within the meaning of Article 16 (1) of Directive 89/391/EEC) (OJ L
404, 31.12.1992, p. 10).

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2 OBJECTIVE OF THE ATEX DIRECTIVE 94/9/EC
The objective of Directive 94/9/EC is to ensure free movement for the products to which it
applies in the EU territory. Therefore the Directive, based on Article 95 of the EC Treaty,
provides for harmonised requirements and procedures to establish compliance.

The Directive notes that to remove barriers to trade via the New Approach, provided for in the
Council Resolution of 7 May 19858, essential requirements regarding safety and other relevant
attributes need to be defined by which a high level of protection will be ensured. These Essential
Health and Safety Requirements (EHSRs) are listed in Annex II to Directive 94/9/EC.

These Essential Health and Safety Requirements are specific with respect to:

• potential ignition sources of equipment intended for use in potentially explosive atmospheres;

• autonomous protective systems intended to come into operation following an explosion with
the prime objective to halt the explosion immediately and/or limit the effects of explosion
flames and pressures;

• safety devices intended to contribute to the safe functioning of such equipment with respect to
ignition source and to the safe functioning of autonomous protective systems

• components with no autonomous function essential to the safe functioning of such equipment
or autonomous protective system(s)

Since 1 July 2003 relevant products could only be placed on the market in the EU territory9, freely
moved and operated as designed and intended in the expected environment if they comply with
Directive 94/9/EC (and other relevant legislation).

Directive 94/9/EC provides for the first time harmonised requirements for non-electrical
equipment, equipment intended for use in environments which are potentially explosive due
to dust hazards and protective systems. Safety devices intended for use outside explosive
atmospheres which are required for or contribute to the safe functioning of equipment or
protective systems with respect to risks of explosion are also included. This is an increase in
scope compared to former national regulations for equipment and systems intended for use
in potentially explosive atmospheres.

The requirements for compliance with the provisions of Directive 94/9/EC will be further
developed in the following chapters.

8
OJ C 136, 4.6.1985, p. 1.
9
Directive 94/9/EC is also applicable in other territories where a suitable international agreement is in
operation. See the DG Enterprise and Industry website for more details:
http://ec.europa.eu/enterprise/sectors/mechanical/international-competitiveness.

- 11 -

3 GENERAL CONCEPTS10
For the purpose of this guide the term "product" covers equipment, protective systems,
safety devices, components and their combinations.

It has to be stressed that Directive 94/9/EC carries obligations for the person who places products
on the market and/or puts products into service, be it the manufacturer, his authorized
representative, the importer or any other responsible person. The Directive does not regulate the
use of equipment in a potentially explosive atmosphere which is covered, for instance, by
Directives 1999/92/EC, 92/91/EC and 92/104/EC11.

3.1 Placing ATEX products on the market

This means the first making available in the European Union, against payment or free of charge, of
products, for the purpose of distribution and/or use in the EU territory.

Comments:

The concept of placing on the market determines the moment when products pass for the first time
from the manufacturing stage to the market of the EU or the importing stage from a non-EU
country to that of distribution and/or use in the EU. Since the concept of placing on the market
refers only to the first time products are made available in the EU for the purpose of distribution
and/or use in the EU, the ATEX Directive 94/9/EC covers only

a) new products manufactured within the EU,

b) "as-new" products according to the section 3.3,

c) new or used products imported from a non-EU country,

d) new or "as-new" products labelled by a person who is not the original manufacturer.

The Directive's provisions and obligations concerning placing on the market have applied after 30
June 2003 to each product individually and are irrespective of the date and place of manufacturing.
It is the manufacturer's responsibility to ensure that each and all of his products comply where
these fall under the scope of the Directive.

"Making available" means the transfer of the product, that is, either the transfer of ownership, or
the physical hand-over of the product by the manufacturer, his authorised representative in the EU
or the importer to the person responsible for distributing these onto the EU market or the passing
of the product to the final consumer, intermediate supplier or user in a commercial transaction, for
payment or free of charge, regardless of the legal instrument upon which the transfer is based
(sale, loan, hire, leasing, gift, or any other type of commercial legal instrument). The ATEX
product must comply with the Directive at the moment of transfer.

If a manufacturer, his authorised representative in the EU or the importer offers products covered
by the Directive in a catalogue, they are deemed not to have been placed on the market until they
are actually been made available for the first time. Therefore products offered in a catalogue do not
have to be in full conformity with the provisions of the Directive 94/9/EC, but this fact should be
clearly advertised in the catalogue.

10
For general definitions see also the "Guide to the implementation Directives based on New Approach
and Global Approach" ("Blue Guide" – see footnote 6). Further definitions specific to Directive
94/9/EC are covered in chapter 4 of this Guide.
11
See footnote 7.

- 12 -

The placing of products on the market does not concern:

- the disposal of products from the manufacturer to his authorised representative
established in the EU who is responsible on behalf of the manufacturer for ensuring
compliance with the Directive;

- imports into the EU for the purpose of re-export, i.e., under the processing arrangements;

- the manufacture of products in the EU for export to a non-EU country;

- the display of products at trade fairs and exhibitions12. These may not be in full
conformity with the provisions of the Directive 94/9/EC, but this fact must be clearly
advertised next to the products being exhibited.

The person placing the product on the EU market, be it the manufacturer, his authorised
representative or, if neither of them is established in the EU, the importer or any other responsible
person, must retain at the disposal of the competent authority the EC declaration of conformity.
The technical documentation has to be made available on request of the enforcement authorities
within a reasonable time (see Annexes III, VI, VIII to the Directive). These documents shall be
maintained by such a person at the disposal of the competent authorities for ten years after the last
item has been manufactured. This applies to products manufactured in the EU as well as those
imported from a non-EU country.

3.2 Putting ATEX products into service

This means the first use of products referred to in Directive 94/9/EC in the EU territory, by its end
user.

Comments:

Products covered by Directive 94/9/EC are put into service at the moment of first use.

However, a product which is ready for use as soon as it is placed on the market and which does not
have to be assembled or installed, and where the distribution conditions (storage, transport, etc.)
makes no difference to the performance or safety characteristics of the product with reference to
the EHSRs of Directive 94/9/EC, is considered to have been put into service as soon as it is placed
on the market, if it is impossible to determine when it is first used.

3.3 Manufacturer

This is any natural or legal person who manufactures a product or has a product designed or
manufactured, responsible for the design and construction of products covered by ATEX Directive
94/9/EC, and markets that product with a view to placing it on the EU market under his own name
or trademark.

The manufacturer may design and manufacture the product itself, or alternatively may use bought-
in items, third-party subcontractor services or components, CE marked or not, to assist in the
manufacture of the product.

Whoever substantially modifies a product resulting in an "as-new" product13, such that its health
and safety characteristics (and/or performance) are in any way affected, with a view to placing it
on the EU market, also becomes the manufacturer.

12
See Article 2.3 of the Directive. Whilst the demonstration of such non-compliant products under the
above conditions is permitted national provisions ensure that such demonstrations do not result in
unsafe situations.
13
See chapter 7 of this Guide.

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3.3.1 Use of subcontractor services by a manufacturer

The manufacturer may have the product designed, manufactured, assembled, packaged, processed
or labelled by subcontractors, with a view to placing the product on the market under its own
name, and thus presenting itself as the manufacturer, disregarding its involvement in the
physical/actual manufacturing processes.

Where subcontracting of this type takes place, the manufacturer must retain the overall control for
the product and ensure that it receives all the information that is necessary to fulfil the
responsibilities of a manufacturer according to the Directive.

In such cases, it cannot discharge itself from its responsibilities as a manufacturer, as it is
responsible for the application of relevant conformity assessment procedures, including engaging a
Notified Body where required to do so by the Directive, for example to approve and carry out
periodic surveillance of the manufacturer's quality management system.

3.3.2 Conformity Assessment Procedures based on quality assurance (Annex IV,
Annex VII)

Due to the use of subcontractors, the manufacturer may not be able to demonstrate (to a Notified
Body) that its own quality assurance system ensures the product complies with the requirements of
the Directive. The production quality assurance (Annex IV) or the product quality assurance
(Annex VII) system at the actual manufacturing plant premises, of the manufacturer itself and/or of
subcontractors, need to be the subject of an assessment by a Notified Body, including periodic
audit visits.

The manufacturer may not rely on the Notified Body audits of the third-parties to discharge its
responsibilities under the Directive. The Notified Body shall not issue the subcontractor with a QA
Notification for this purpose, unless the subcontractor holds its own EC Type Examination
certificate for the same product.

In case the manufacturer uses a subcontractor for the production or labelling of a product, which
places the same product on the market under its own name, it is sufficient for the manufacturer to
apply for a second certificate based on the certificate of the subcontractor. The manufacturer will
be expected to submit

- the original certificate,

- a declaration by the original manufacturer that the equipment to be produced under the name of
the trade agent will be identical with the originally certified equipment,

- a declaration by the trade agent that the equipment brought to the market will be identical to that
originally certified, and

- a copy of the contractual agreement between A and B.

See also the Consideration Paper by the ATEX Standing Committee "Certificates and CE marking
without the name of the original manufacturer"
(http://ec.europa.eu/enterprise/sectors/mechanical/documents/guidance/atex/standing-
committee/ce-marking).

Comments:

The manufacturer bears responsibility for:

- undertaking an analysis to conclude if his product is subject to Directive 94/9/EC and
which requirements apply (as further explained in chapter 4);

- 14 -

- design and construction of the product in accordance with the Essential Health and Safety
Requirements laid down in the Directive;

- following the procedures for the assessment of the conformity of the product with the
Essential Health and Safety Requirements laid down in the Directive (see Article 8);

- signing the Declaration or Attestation of Conformity;

- providing marking and instructions for safe use, maintenance etc. as described in Annex
II to the Directive.

The manufacturer has sole and ultimate responsibility for the conformity of his product to the
applicable directives. He must understand both the design and construction of the product to be
able to declare such conformity in respect of all applicable provisions and requirements of the
relevant directives.

Articles 8 and 10 and their associated annexes of the Directive 94/9/EC define the obligations
incumbent on the manufacturer with regard to conformity assessment, CE marking, the EC
declaration of conformity, written attestation of conformity (if relevant) and the arrangements for
holding the EC declaration of conformity, together with the technical documentation, at the
disposal of the competent authorities for a period of ten years after the last product has been
manufactured.

3.4 Manufacturing of ATEX products for own use

Whoever puts into service products covered by the Directive, which he has manufactured for his
own use, is considered to be a manufacturer. He is obliged to conform to the Directive in relation
to putting into service.

3.5 Authorised representative

This is the person or persons expressly appointed by the manufacturer by a written mandate to act
on his behalf in respect of certain manufacturer's obligations within the EU. The extent to which
the authorised representative may enter into commitments binding on the manufacturer is restricted
by the relevant Articles of the Directive and determined by the mandate conferred on him by the
latter.

As an example, he could be appointed to undertake the testing in the EU territory, sign the EC
Declaration of Conformity, affix the CE marking and hold the EC Declaration of Conformity and
the technical documentation within the EU at the disposal of the competent authorities.

The quality assessment system of the authorised representative/responsible person shall not be
subject to assessment by a Notified Body, but the quality assessment system of the actual
manufacturer. It would not be reasonable to assess a quality assessment system of a facility that is
not producing the product. However, if the authorised representative is carrying out tests and/or
verifications required by the Directive to determine conformity with the Essential Health and
Safety Requirements, he shall be subject to quality assurance assessment.

Comments:

Articles 8 and 10 together with Annexes 3 - 9 to the Directive 94/9/EC define the obligations
incumbent on the authorised representative established within the EU with regard to conformity
assessment, CE markings, EC Declaration of Conformity and the arrangements for holding this EC
Declaration of Conformity, together with the technical documentation, at the disposal of the
competent authorities for a period of ten years after the last product has been manufactured.

- 15 -

3.6 Other persons responsible for placing on the market

Where neither the manufacturer, nor the authorised representative is established within the EU,
any other person resident in the EU who places the product on the EU market has obligations
under the scope of the Directive. The only obligation is to keep available the necessary
documentation at the disposal of the competent authorities for ten years after the last product has
been manufactured. In their capacity as "person responsible for placing on the market" they are not
entitled to assume other responsibilities which are solely reserved to the manufacturer or his
authorized representative (e.g. signing the EC Declaration of Conformity).

3.7 Equipment14
Equipment15, as defined in Directive 94/9/EC, means machines, apparatus, fixed or mobile
devices, control components and instrumentation thereof and detection or prevention systems
which, separately or jointly, are intended for the generation, transfer, storage, measurement,
control and conversion of energy and/or the processing of material and which are capable of
causing an explosion through their own potential sources of ignition16.

3.7.1 Potentially explosive atmosphere

Equipment is only considered to be within the scope of the Directive if it is intended (either in
whole or in part) to be used in a potentially explosive atmosphere.

If a product containing an intended potentially explosive atmosphere, for example a vessel, itself
contains equipment as defined in the Directive, then the latter equipment is in effect in a
potentially explosive atmosphere, albeit one which is contained by the vessel, and is therefore
subject to the Directive.

If equipment containing a potentially explosive atmosphere can, due to its construction, operation
etc. create a potentially explosive atmosphere itself, which wholly or partially surrounds it, then
such equipment is in effect in a potentially explosive atmosphere, and is therefore subject to the
Directive.

A third scenario is that there may not only be a surrounding potentially explosive atmosphere but
also a process that requires such a mixture to enter and/or be released from the product. The
interface between the equipment and the process input/ output will also require consideration. This
may, in some cases, lead to equipment having more than one category, one (or more) for the
external atmosphere and another for the process atmosphere.

3.7.2 "Own" ignition source

Another defining element of equipment in the sense of the Directive is that it has to have its own
potential source of ignition.

14
It has become evident that a number of language versions of the ATEX Directives interpret some
definitions in different ways. The information provided here is intended to inform interested parties
throughout the EEA on the common approach agreed by the Member States. It does not, however,
impact in any way on the different versions as implemented in relevant national legislation, nor the
right of the manufacturer to choose this route should he/she so desire.
15
Article 1.3(a) of the Directive.
16
Following discussions in the Standing Committee and the standardisation bodies it should be noted
that intrinsically safe electrical equipment is included in the scope of the Directive.

- 16 -

Potential sources of ignition could be: electric sparks, arcs and flashes, electrostatic discharges,
electromagnetic waves, ionising radiation, hot surfaces, flames and hot gases, mechanically
generated sparks, optical radiation, chemical flame initiation17, compression.

In some cases a product may only contain a potentially explosive atmosphere which is deliberately
ignited. It is clearly not the intention that these fall under the scope of Directive 94/9/EC unless
other relevant hazards exist. Most equipment made to the Gas Appliances Directive 90/396/EEC
will fall into this category.

Equipment can be said to have its own potential source of ignition, if, when operated as intended
(including malfunctions, etc. to an extent depending on its category – see Annex I to the Directive)
in a potentially explosive atmosphere, it is capable of igniting the latter unless specific safety
measures are taken. Therefore, equipment must ensure the required level of protection.

To ensure this required level of protection various techniques can be applied, e.g.: intrinsic safety,
pressurisation, increased safety, etc.

Many common items are made from plastics (polymers) with very low electrical conductivity.
These can become charged, e.g. if they are rubbed, or if dust or a liquid flows over the surface.
However, in most cases this may be controlled by the user, and if they are used in hazardous areas
it shall be assessed and controlled according to the requirements of relevant national or
community legislation (e.g. Directive 1999/92/EC18). In any case the user of such equipment has to
consider these ignition sources when undertaking a risk assessment in the workplace.

Examples are plastic containers used for transporting chemicals, polyethylene pipes, buckets and
chairs.

If the only source of electrostatic charging comes from the process, such items are not considered
to have their own source of ignition, and they are not in scope of Directive 94/9/EC. In these cases
they should not be Ex or CE marked according to Directive 94/9/EC.

If the polymeric item is intended to be incorporated into ATEX equipment, and could become
charged by the movement of the equipment (for example a fan blade) or by the intended use of the
equipment, they may be classed as ordinary parts of the equipment with specific properties (e.g. to
be electrostatically dissipative) or as ATEX components if they are placed on the market
specifically for this intended use.

3.7.3 Non-Electrical Equipment

If non-electrical equipment has a potential ignition source, in most cases this is due to moving
parts able to create a potential ignition risk either from hot surfaces, or friction sparks. Examples
are: gears, fans, pumps, compressors, mixers, brakes. Mechanical equipment of this type usually
has to be connected to a power source, such as an electric motor. Together placed on the market in
this form, it might be an assembly, see section 3.7.5.

Mechanical equipment may be fitted with a thermocouple or similar measuring device that
generates only very low voltages and currents. If these measuring devices can be considered as
'simple apparatus’ as described in section 5.2.1 and there are no other electrical parts, the
equipment should follow the conformity assessment procedures for non-electrical equipment. If
the equipment contains electrical apparatus that can be clearly separated, the conformity
assessment procedure for non-electrical parts can be made separately if the conditions under 3.7.4
(e.g. pump) apply. If the electrical equipment fitted to the non-electrical equipment is not "simple
apparatus", the product is usually considered as an assembly (see assemblies chapter).

17
Account needs to be taken of the specific exclusion at Article 1 (4) of the Directive 94/9/EC of
equipment where explosion hazards result exclusively from the presence of explosive substances or
unstable chemical substances.
18
See footnote 7.

- 17 -

All potential ignition sources should be considered for equipment that is within the scope. For a
list of potential ignition sources, see the relevant harmonised standards for equipment. In many
cases the equipment will also be machinery within scope of Directive 2006/42/EC, see section 6.

Many mechanical items move very slowly, or have very low power input. Such equipment may be
incapable of forming hot surfaces or other ignition sources, even in cases of rare malfunction. The
manufacturer should assess if such equipment is potentially capable of igniting an explosive
atmosphere, and if it is not, it shall not be classed as ATEX equipment nor be marked according to
Directive 94/9/EC (see also chapter 5.2.1).

3.7.4 Electrical Equipment

Directive 94/9/EC does not define "Electrical Equipment". However, because such equipment is
subject to its own conformity assessment procedure it may be useful to provide a definition, which
has been generally accepted by the majority of Member States, as follows:

Electrical Equipment: equipment containing electrical elements, used for the generation, storage,
measurement, distribution and conversion of electrical energy, for controlling the function of other
equipment by electrical means or for processing materials by the direct application of electrical
energy. It should be noted, that a final product assembled using both electrical and mechanical
elements may not require assessment as electrical equipment provided the combination does not
lead to additional ignition hazards for this assembly (for further details see section 3.7.5).

3.7.5 Assemblies

From the term ‘jointly’ in the definition of equipment in the Directive it follows that an assembly,
formed by combining two or more pieces of equipment, together with components if necessary,
has to be considered as a product falling under the scope of Directive 94/9/EC (see footnote 1),
provided that this assembly is placed on the market and/or put into service by a responsible person
(who will then be the manufacturer of that assembly) as a single functional unit.

Such assemblies may not be ready for use but require proper installation. The instructions (Annex
II, 1.0.6.) shall take this into account in such a way that compliance with Directive 94/9/EC is
ensured without any further conformity assessment provided the installer has correctly followed
the instructions.

In the case of an assembly consisting of different compliant pieces of equipment as defined by
Directive 94/9/EC which were previously placed on the market by different manufacturers these
items of equipment have to conform with the Directive, including being subject to proper
conformity assessment, CE-marking, etc. The manufacturer of the assembly may presume
conformity of these pieces of equipment and may restrict his own risk assessment of the assembly
to those additional ignition and other relevant hazards (as defined in Annex II), which become
relevant because of the final combination. If there are additional ignition hazards, a further
conformity assessment of the assembly regarding these additional risks is necessary. Likewise, the
assembler may presume the conformity of components which are accompanied by a written
attestation of conformity issued by their manufacturer (Article 8.3, see also chapter 10).

However, if the manufacturer of the assembly integrates parts without CE-marking into the
assembly (because they are parts manufactured by himself or parts he has received from his
supplier in view of further processing by himself) or components not accompanied by the above
mentioned certificate, he shall not presume conformity of those parts and his conformity
assessment of the assembly shall cover those parts as required.

Note that the manufacturer's own risk assessment does not necessarily preclude the use of Notified
Bodies in the applicable conformity assessment procedure(s).

In order to clarify the concept of "assembly" in the sense of Directive 94/9/EC, a pump/electric
motor combination intended for use in potentially explosive atmospheres can be used.

- 18 -

1. For the purposes of Directive 94/9/EC, a split tube motor pump constitutes a single item of
equipment with respect to the ignition hazard, i.e. the pump and electric motor cannot be
considered separately for the purposes of assessing explosion risk(s). In this case, the unit as a
whole has to undergo the conformity assessment procedure of electrical equipment. The same
applies e.g. for an electrical ventilating fan where the fan is an integral part of the motor.

2.a) In some cases the pump and electric motor can be considered separately although they form a
functional unit. If in this case there is no additional ignition hazard as a result of assembling the
pump and motor, this functional unit as a whole does not constitute a single item of equipment
which falls within the scope of Directive 94/9/EC. It is then to be considered a combination of
"individual items of equipment" in terms of explosion protection. In this case, therefore, the
manufacturer of pump and electrical motor must supply an EC declaration of conformity for each
of both items.

2.b) A manufacturer may nevertheless choose to supply pump and motor as described in 2.a) with
one declaration of conformity for the assembly as a whole. In this case further clarification is
required as to the obligation of the assembler where only ATEX CE compliant products (such as
equipment and autonomous protective systems) are used. Here it is clear that the assembler needs
to undertake an ignition risk assessment to ensure that the nature of the incorporation and assembly
has not altered the explosion characteristics of the products with respect to the Essential Health
and Safety Requirements. If the assembler is in any way uncertain as to how to undertake such an
assessment, technical advice should be sought and taken into account! This might be the case,
for example, if a manufacturer of mechanical equipment needs to connect different pieces of
ATEX electrical equipment together as part of the assembly. Once the assembler has
successfully undertaken such an assessment and no additional ignition risk has been identified, the
general agreement is that he then draws up a technical file, affixes the CE and Ex marking
according to Annex II 1.0.5 of the Directive to the assembly, indicating intended use, signs the EC
Declaration of Conformity covering the whole of the assembly indicating the technical
specifications/ standards applied (for example, for electrical inter-connection) and provide
instructions for safe use. The assembler therefore takes complete responsibility for the assembly.
This procedure does not require the involvement of a Notified Body.

2.c) If there is an additional ignition hazard as a result of assembling pump and motor, or if one
item is not already in full conformity with the Directive, the assembly has to undergo the complete
conformity assessment procedure appropriate for the category.

Assemblies may be placed on the market in different ways:

3.7.5.1 Assemblies, which are fully specified configurations of parts

In this case the manufacturer has already defined one or more invariable combination(s) of parts
and places them on the market as a single functional unit / single functional units.

An example could be instrumentation consisting of a sensor, a transmitter, a Zener barrier and a
power supply if provided by one manufacturer.

The above mentioned parts are put together by the same person (the manufacturer of the
assembly), and placed on the market as a single functional unit. This person assumes responsibility
for the compliance of the integral assembly with the Directive.

The EC declaration of conformity, as well as the instructions for use must refer to the assembly as
a whole. It must be clear (e.g. by enclosing a list of all parts and/or a list of the safety related data)
which is/are the combination(s) that form(s) the assemblies. The manufacturer assumes
responsibility for compliance with the Directive, and must therefore, in accordance with Annex II
1.0.6, provide clear instructions for assembly/installation/operation/maintenance etc. in the
instructions for use.

- 19 -

3.7.5.2 Assemblies with various configurations

Here the manufacturer has defined a whole range of different parts, forming a "modular system".
Either he or the user/installer selects and combines parts out of this range to form an assembly,
which serves the specific task.

An example could be a modular system for flameproof switch- and control gear, consisting of a
range of flameproof enclosures of different size, a range of switches, terminals, circuit breakers
etc.

Although in this case the parts are not necessarily put together by the manufacturer of the
assembly, and placed on the market as a single functional unit, the manufacturer is responsible for
the compliance of the assembly as long as the parts are chosen from the defined range and selected
and combined according to his instructions.

The EC Declaration of Conformity, as well as the instructions for use must refer to the "modular
system" as a whole. It must be clear which the parts that form the modular system are, and how
they are to be selected to form a compliant assembly. Therefore the manufacturer must, in
accordance with Annex II 1.0.6, provide clear instructions for selection of parts and their assembly
/installation /operation /maintenance etc. in the instructions for use.

The conformity assessment of such modular systems may be done (as a minimum) by means of the
assessment of those intended configurations which are the most unfavourable regarding the
relevant risks (worst cases). If those configurations are considered compliant to the EHSRs of
Directive 94/9/EC the manufacturer may conclude conformity of all other intended configurations
as well. If later on other parts are to be added to the "modular system" it may of course become
necessary to identify and assess the worst case scenario again.

The table on the following page gives a condensed overview of the various situations regarding
assemblies.

- 20 -

Table 1: Summary of Requirements for Assemblies
SITUATION: Equipment, protective systems, devices (Art. 1.2) all CE-marked (accompanied by a Equipment, protective systems, devices (Art. 1.2), including non CE-marked, and
1. Parts: certificate of conformity) and components accompanied by a written attestation components not accompanied by a written attestation (Art. 8.3).
Assembly is (Art. 8.3). (parts without proven conformity)
composed of… (parts with proven conformity) (*)
2. Configuration: Exactly defined configuration(s) A "modular system" of parts, to be Exactly defined configuration(s) A "modular system" of parts, to be
Assembly is placed specifically selected and configured to specifically selected and configured to
on the market as… serve a specific purpose, maybe by the serve a specific purpose, maybe by the
user/installer. user/installer.

3. RESULT: All parts All parts Only parts with proven conformity Only parts with proven conformity
Manufacturer may
presume conformity
for…
4. Conformity CA has to cover the whole CA has to cover at least those of the CA has to cover: CA has to cover:
Assessment (CA) configuration regarding all risks, possible and useful configurations, which - all parts without proven conformity - all parts without proven conformity
which might arise by the interaction of are assessed to be the most unfavourable regarding all risks, and which are part of the "modular system",
the combined parts, with respect to the regarding all risks, which might arise, by - all configuration(s) regarding all risks regarding all risks, and
intended use. the interaction of the combined parts, with which might arise by the interaction of - at least those of the possible and useful
respect to the intended use. the combined parts, configurations, which are assessed to be
See also Note (*) both with respect to the intended use. the most unfavourable regarding all risks
See also Note (*) which might arise by the interaction of the
combined parts,
both with respect to the intended use.
5. Information to be a) identification of the items in the a) identification of the items in the a) identification of the items in the a) identification of the items in the
provided: assembly that are ATEX equipment in "modular system" that are ATEX assembly that are ATEX equipment in "modular system" that are ATEX
their own right, and which have been equipment in their own right, and which their own right, and which have been equipment in their own right, and which
a) by EC- separately assessed; have been separately assessed; separately assessed; have been separately assessed;
Declaration of
Conformity b) instructions for installation and use, b) instructions for the selection of parts, to b) instructions for installation and use, b) instructions for the selection of parts, to
sufficient to ensure that resulting be combined to fulfil the required purpose, sufficient to ensure that resulting be combined to fulfil the required purpose,
b) by instructions for assembly complies with all relevant and instructions for installation and use, assembly complies with all relevant and instructions for installation and use,
installation and use EHSRs of Directive 94/9/EC. sufficient to ensure that resulting assembly EHSRs of Directive 94/9/EC. sufficient to ensure that resulting assembly
complies with all relevant EHSRs of complies with all relevant EHSRs of
Directive 94/9/EC. Directive 94/9/EC.

(*) Note: A written attestation of conformity for a component can not guarantee, in general, the safety of the equipment into which the component is to be incorporated, as for a component, all
possible use can not be foreseen. In this case, further investigation and evaluation by a Notified Body shall be carried out in the assembly, when required.

- 21 -

3.8 Protective Systems

Protective Systems19 means devices other than components of the equipment defined above which
are intended to halt incipient explosions immediately and/or to limit the effective range of an
explosion and which are separately placed on the market for use as autonomous systems.

Examples of autonomous protective systems are:

• flame arresters;

• explosion relief systems (using e.g. bursting discs, vent panels, explosion doors, etc.);

• extinguishing barriers;

• explosion suppression systems.

It is clear that certain simple products used in coal mines act as protective systems but cannot be
subject to the provisions of the Directive (e.g. chalk dust on planks).

From its intended function it is obvious that a protective system will, at least partially, be installed
and used in a potentially explosive atmosphere.

Because a protective system has the function to eliminate or reduce the dangerous effects of an
explosion (a safety function) it is subject to the Directive regardless as to whether it has its own
potential source of ignition or not. In this first case it would have to comply with the specific EHSRs
for equipment as well.

According to Article 1.3.(b) protective systems are placed on the market separately for use as
autonomous systems20. Consequently their conformity with the relevant EHSRs of Annex II has to
be assessed according to Article 8(2) and they have to be marked according to Article 10(2).

Of course ‘protective systems’ may also be placed on the market as an integral part of equipment.
Technically speaking these remain ‘protective systems’ because of their function, but are not
considered as autonomous protective systems in the sense of the Directive regarding conformity
assessment and marking. In such cases their conformity is assessed in the course of the conformity
assessment of the equipment they are integrated into, using the procedures foreseen in Article 8
according to the group and category of that equipment. They are not separately marked.

It is, however, important to note that the specific EHSRs of Annex II.3 also apply for integrated
"protective systems".

3.9 Components

The two defining elements for components21are that they,

• are essential to the safe functioning of equipment and protective systems with respect to
explosion protection (otherwise they would not need to be subject to the Directive);

• with no autonomous function (see 3.8) (otherwise they would have to be regarded either as
equipment, protective system or as device according to Article 1(2)).

A product is considered to have an autonomous function if it can be safely used to deliver, or
contribute towards the delivery of, one or more of the intended functions of Article 1.2 or Article
1.3.a) or b), without the need to add any further parts. This does not preclude that specific
instructions for installation and use are to be followed.

19
Article 1.3(b) of the Directive.
20
See Corrigendum to the English language version of Directive 94/9/EC (OJ L 21, 26.1.2000).
21
Article 1.3(c) of the Directive.

- 22 -

Some kind of products may, depending on the extent of the conformity assessment already
undertaken before being placed on the market and/or put into service, be considered either as with or
without autonomous function.

If the function of the product can be delivered without further parts then, where relevant, it cannot be
considered a component.

Components intended for incorporation into equipment or protective systems which are accompanied
by an attestation of conformity including a statement of their characteristics and how they must be
incorporated into products (see Article 8(3)), are considered to conform to the applicable provisions
of Directive 94/9/EC. Ex-components as defined in the European standards harmonised under
Directive 94/9/EC are components in the sense of the ATEX as well. Components must not have
the CE marking affixed unless otherwise required by other directives (e.g. the EMC Directive
2004/108/EC).

Examples for items which could be placed on the market as components, if they are explicitly intended to
be incorporated into ATEX products:

• terminals;

• push button assemblies;

• relays;

• empty flameproof enclosures;

• ballasts for fluorescent lamps;

• encapsulated relays and contactors, with terminals and/or flying leads;

• machinery brakes designed to be part of ATEX equipment;

• a pressurised container including suppressant powder forming part of an explosion suppression
system;

• conveyor belting for a conveyor transporting combustible dusts;

• non-autonomous protective systems;

• suction hoses used on vacuum cleaners;

• forks for forklift trucks.

According to Article 8.3 the conformity of components has to be assessed by means of the same
procedures as the equipment, protective systems or devices according to Article 1(2) into which they
are to be integrated. Some components may be assigned a category, in which case they will always
be used in equipment of that category. Other components may be more widely used, and no category
can be defined. In addition, components for e.g. autonomous protective systems do not need to bear
a category as the protective systems themselves are not categorised. It depends on the detail that is
given in any documentation provided (e.g. where relevant by means of a written attestation of
conformity).

For example, drive-belts, bearings, mechanical seals, Zener diodes, etc. are not usually placed on the
market with the explicit intention to be incorporated into equipment, protective systems or devices
according to Article 1.2 but for general engineering purposes. Their conformity (i.e. their suitability
for the intended purpose as regards safety of the product they are integrated into) has to be assessed
in the course of the conformity assessment of the integral product.

If components are to be placed on the market with the explicit intention of incorporation into
equipment, protective systems or devices according to Article 1.2 (as e.g. increased safety terminal
blocks, flameproof enclosures, etc.), they shall be assessed separately according to Article 8.3 and

- 23 -

accompanied by a written attestation of conformity as referred to in Article 8.3. Otherwise, Member
States can prohibit, restrict or impede their placing on the market (Article 4.2) and cannot presume
their conformity (Article 5.1).

If a component is subject to a conformity assessment procedure under which a Notified Body issues
a Type Examination Certificate, the Certificate must detail those requirements of Annex II that have
been assessed.

3.10 Safety, controlling or regulating devices as defined in Article 1.2

Devices in the scope of Article 1.2

1. Safety devices, controlling devices and regulating devices, if they contribute to or are required
for the safe functioning of equipment or protective systems with respect to the hazards of
ignition or - respectively - with respect to the hazard of uncontrolled explosion are subject to
the Directive;

2. These devices are covered even if they are intended for use outside the potentially explosive
atmosphere. Those devices are not classified into categories according to Article 1.

3. Safety instrumented systems (e.g. a sensor, PLC and an actor) in the sense of items 1. and 2..
The whole system must be considered as a safety device in the sense of Article 1.2. Parts of this
safety device may be located inside (e.g. a sensor) or outside (e.g. PLC) potentially explosive
atmospheres.

For such devices, the essential requirements shall only apply so far as they are necessary for the safe
and reliable function and operation of those devices with respect to the hazards of ignition or -
respectively - with respect to the hazard of uncontrolled explosion (Annex II, Preliminary
observation B).

Examples:

• a pump, pressure regulating device, backup storage device, etc. ensuring sufficient pressure and
flow for feeding a hydraulically actuated safety system (with respect to the ignition hazard);

• overload protective devices for electric motors of type of protection Ex e ‘Increased Safety’;

• controller units in a safe area, for an environmental monitoring system consisting of gas detectors
distributed in a potentially explosive area, to provide executive actions on one or a small number
of equipment or protective systems in terms of further avoiding an ignition hazard if dangerous
levels of gas are detected;

• controller units connected to sensors measuring temperature, pressure, flow, etc, located in a safe
area, used to control (in terms of further avoiding an ignition hazard) electrical apparatus, used in
production or servicing operations in a potentially explosive area.

For safety and economic reasons it will be preferable in most cases to install such devices in a non-
hazardous area. However, sometimes this might not be possible. In such cases, although the
Directive does not explicitly say so, these devices can also be designated as equipment.

Two situations can be identified:

• If the device has its own potential source of ignition then, in addition to the requirements
resulting from Article 1.2, the requirements for equipment will apply;

• If the device does not have its own potential source of ignition then the device shall not be
regarded as equipment but, evidently, the requirements resulting from Article 1.2 will still
apply.

Devices outside the scope of Article 1.2

- 24 -

1. Devices other than safety, controlling and regulating devices.

2. All devices, including safety, controlling and regulating devices, neither contributing to
nor required for the safe functioning with respect to the hazards of ignition or with
respect to the hazard of uncontrolled explosion;

3. Even safety, controlling and regulating devices contributing to or required for the safe
functioning but with respect to hazards other than the hazards of ignition or -
respectively - with respect to the hazard of uncontrolled explosion;

4. Monitoring devices providing only an alarm signal to protect persons but without control
of the equipment inside the hazardous area.

Examples:

• Switchgear, numeric controllers, etc. not related to any safety functions (with respect to the
ignition hazard); see 2. above;

• Water spray systems designed to protect plant from fire;

• Blast doors designed to withstand a stated overpressure (these are designed primarily as doors,
and they do no more than the walls they are placed in to protect against an explosion;

• Gas detector systems that raise an alarm but have no controlling function on the equipment;

• Emergency ventilation systems which act when gas is detected.

- 25 -

4 IN WHICH CASES DOES DIRECTIVE 94/9/EC APPLY?
The manufacturer, his authorised representative or the person who first places a product on the EU
market or puts a product into service in the EU market has to decide whether it is covered by the
Directive 94/9/EC and, if so, apply its provisions. The manufacturer (in the broadest sense of the
Directive) must therefore make an ATEX analysis on the basis of Directive 94/9/EC.

4.1 ATEX Analysis

4.1.1 What is a potentially explosive atmosphere in the sense of Directive
94/9/EC?

Directive 94/9/EC is a directive following the "New Approach" and therefore is intended to enable
the free movement of goods within the EU. This is achieved by harmonisation of legal safety
requirements, following a risk-related approach. Its objective is also to eliminate or at least minimise
the risks resulting from the use of certain products in or in relation to a potentially explosive
atmosphere. The manufacturer has to make assumptions about the intended use of his product
including the contact with potentially explosive atmospheres.

An explosive atmosphere for the purposes of Directive 94/9/EC is defined as a mixture

i) of flammable substances in the form of gases, vapours, mists or dusts;

ii) with air;

iii) under atmospheric conditions22;

iv) in which, after ignition, the combustion spreads to the entire unburned mixture (It has
to be noted that sometimes (mainly with dusts) not always the whole quantity of the
combustible material is consumed by the combustion).

An atmosphere, which could become explosive due to local and/or operational conditions, is called a
potentially explosive atmosphere. It is only this kind of potentially explosive atmosphere which
products falling under the Directive 94/9/EC are designed for (see as well chapter 4.3 ‘Risk
Assessment’).

It is important to note, that products are not covered by Directive 94/9/EC where they are intended
for use in or in relation to mixtures which might potentially be explosive, but one or more of the
defining elements i) to iv) above are not present.

For example:

• A product within a potentially explosive mixture without the presence of air is not in the scope
of the Directive23. Special processes of this type require equipment that has been specially
designed for the risks, as equipment intended for use in potentially explosive atmospheres may
pose an ignition hazard for mixtures under non-atmospheric conditions.

22
The Directive 94/9/EC does not define atmospheric conditions. However, a surrounding temperature
range of –20°C to 60°C and a range of pressure between 0.8 bar and 1.1 bar may be appropriate as a
basis for design and intended use of products. This does not preclude that products may be specifically
designed and assessed for operation occasionally outside these conditions. It should be noted that
electrical products are normally designed and tested for use in the ambient temperature range –20°C to
40°C in conformity with the harmonised standards. Products designed for use outside of this range will
require additional marking to be added and further testing as appropriate. This will normally require
agreement between the manufacturer and intended user.
23
Examples for such atmospheres could be: mixtures which are explosive without air (e.g. H2 mixed with
Cl2), mixtures of flammable substances with other oxidants than air, pressure and/or temperature
conditions outside the atmospheric range, etc.

- 26 -

• Conveying equipment where some parts but not all are under atmospheric pressure with
internal pressures different from atmospheric pressure can fall under the scope of Directive
94/9/EC. When performing a risk assessment it will become evident that although parts of the
described equipment are outside the scope of Directive 94/9/EC during normal operation
(pressure oscillates between too low and too high values in relation to "atmospheric
conditions") some parts or spaces still are under the scope and that the whole equipment during
start-up and shut-down is under the scope, at least.

So, both the following examples fall under the scope of Directive 94/9/EC:

a) A vapour recovery pump for petrol stations is connected at its inlet and outlet to a potentially
explosive atmosphere in the sense of Directive 94/9/EC.

b) A vacuum pump sucking from a vacuum container and conveying the mixture into a
pressure vessel or pressure line. In this case the inner parts of the pump are not connected to a
potentially explosive atmosphere in the sense of Directive 94/9/EC.

Note: The manufacturer may wish to sell this equipment for use under atmospheric conditions
of the inlet and outlet side additionally, and then case a) applies. In any case, the complete
working cycle needs to be considered, including start-up and shut-down, which may cause an
atmospheric pressure to exist. If the equipment is not intended for atmospheric use, the
Directive does not apply. Risk assessment must be carried out according to Directive
1999/92/EC.

As long as the user is not able to ensure the absence of a potentially explosive atmosphere, start-up
and shut-down are relevant to determine the application of the Directive.

4.1.2 Which kinds of products are covered by Directive 94/9/EC?

To be within the scope of the Directive, a product has to be:

a) equipment, as defined in Article 1.3.(a); or

b) a protective system, as defined in Article 1.3.(b); or

c) a component, as defined in Article 1.3.(c); or

d) a safety, controlling or regulating device as defined in Article 1.2.

In some specific circumstances clarification is needed, in order to decide whether a certain product
falls within the scope of Directive 94/9/EC or not. This will be clarified using the example of
"Inerting Systems" (section 4.1.2.1) and "Paint Spray Booths" (section 4.1.2.2). In addition, two
frequently arising questions concern:

• the place of installation of equipment and protective systems (section 4.1.2.3), and

• the existence of interfaces to different potentially explosive atmospheres (section 4.1.2.4).

4.1.2.1 Inerting Systems

When looking for the application of Directive 94/9/EC to inerting systems one has to consider three
different cases:

1. Preventing an explosive atmosphere

Inerting systems are aimed at reducing or completely preventing the existence of an explosive
atmosphere in specific areas. Inerting systems are not, however, intended to stop or restrain incipient
explosions; hence they are not protective systems within the meaning of Directive 94/9/EC. The goal
of inerting systems is different from those of explosion suppression systems, which may sometimes
have similar parts, but are aimed at restraining an incipient explosion.

- 27 -

In broad terms: inerting systems used during operation of plants etc. are normally not in scope of
Directive 94/9/EC.

Example:

The intended effect of an inerting system applied to inert a tank can only be assessed after knowing
all operational parameters of the volume to be inerted. This assessment and the functional aspects of
such systems are not covered by Directive 94/9/EC but a duty to be considered by the user and has to
be laid down e.g. in the explosion protection document under the scope of the Directive 1999/92/EC
and its national transpositions.

2. Inerting systems as equipment

An inerting system may (in part) also consist of parts which are intended for use within an explosive
atmosphere and which have a potential ignition source of their own. These parts come – individually
or possibly combined – under the scope of Directive 94/9/EC as "equipment". Also in this case their
function of preventing an explosive atmosphere by inerting is not to be assessed within the meaning
of this Directive.

3. Inerting systems as part of the ignition protection concept

In some cases, such systems may be part of the ignition protection concept of "explosion protected"
equipment to fulfil the requirements of Annex II to Directive 94/9/EC, i.e. if they work as a means to
protect potential ignition sources of the equipment from coming into contact with an existing
potentially explosive atmosphere. This equipment, including its inerting system, comes as part of the
equipment under the scope of Directive 94/9/EC. This inerting system is not a protective system
according to Article 1(1). Its parts may be safety, controlling and regulating devices according to
Article 1(2) of Directive 94/9/EC when separately placed on the market.

In broad terms: Directive 94/9/EC applies to an inerting system, if this system is – or is intended to
be – integrated into the ignition protection concept of the equipment and thus serves to avoid
ignition sources of the equipment.

Example:

Where the manufacturer of equipment intended for use in potentially explosive atmosphere wants to
protect the ignition sources of this equipment, he may use the type of protection "pressurisation"
according to EN 50016. This type of protection may include the use of inert gases as protective
gases. In this case the inerting system is part of the equipment and as such within the scope of
Directive 94/9/EC. The following case may occur in practice: Equipment according to Article 1 of
Directive 94/9/EC contains an enclosure or a vessel containing sources of ignition. In order to
prevent an explosive atmosphere from coming into contact with the ignition sources, an inerting
system, which has been assessed in accordance with the 94/9/EC Directive as a safety device, can be
applied to this equipment.

4.1.2.2 Paint Spray Booths

These products are an enclosed area, where an operator may work inside or outside, and may be
described as a "simple box". The "box", with no ignition source and not intended for use in a
potentially explosive atmosphere, does not fall within the scope of the ATEX Directive 94/9/EC.

Under operating conditions a potentially explosive atmosphere is created and the enclosed area,
openings and recovery systems are normally assessed with regard to the explosion risk. The
equipment, protective systems and components intended for use in this assessed potentially
explosive atmosphere including safety and controlling devices outside, but contributing to their safe
functioning, are within the scope of the ATEX Directive 94/9/EC.

In summary, paint spray booths, as an integral whole, do not fall under scope of the ATEX Directive
94/9/EC and as such cannot be affixed with the special marking for explosion protection and other
marking detailed at Annex II, EHSR 1.0. of the Directive.

- 28 -

4.1.2.3 Place of intended use

Manufacturers of explosion protected equipment (e.g. in cases where potentially explosive
atmospheres are conveyed) sometimes feel unsure whether and to what extent their products are
covered by Directive 94/9/EC (see chapter 3.7.1). This applies especially to cases where only parts
of the equipment are in contact with the explosive atmosphere.

Directive 94/9/EC deals with the special risk of explosion and has one major aim to prevent "own
potential sources of ignition" (Art. 1(3)a) of equipment and protective systems (as far as it has an
own potential source of ignition) from becoming active. Beside Art. 1(4) no restrictions are made
with regard to local and technical conditions.

The probability of occurrence of the potential source of ignition determines the category. The
technical requirements are summarised in Annex II 1.0.1; especially the 2nd indent describes the
importance of the potential of the source of ignition. For this effect the place of installation is not
decisive (see Art. 1(2) safety-, controlling-, regulation devices), but the possible effect of the
potential source of ignition on a potentially explosive atmosphere.

In the light of these ideas the place of installation "in, at or beside" a potentially explosive
atmosphere is not decisive for the application of Directive 94/9/EC. The decisive fact is whether
the potential sources of ignition of an equipment are in contact – or have an interface – to a
potentially explosive atmosphere, with the effect that the combustion may spread to the entire
unburned mixture (see definition "explosive mixture"). In this case the potential source of
ignition is in the potentially explosive atmosphere.

Equipment may have an internal explosive mixture (without limitation to dangerous quantities),
which has an interface in the sense of a spreading of the combustion to a potentially explosive
atmosphere even in the case it is not installed completely inside a potentially explosive atmosphere.
An example could be an extraction system installed outside the potentially explosive atmosphere
with a ventilator – own potential source of ignition – which exhausts explosive atmosphere out of a
storage tank, or another potentially explosive atmosphere, via a pipe acting as connecting interface to
the potentially explosive atmosphere.

It is important to underline in this context how machinery having a potentially explosive atmosphere
inside under operating conditions, but having no interface to external potentially explosive
atmospheres has to be considered. Such machines, as an integral whole, do not fall under scope of
the ATEX Directive 94/9/EC (see also chapter 4.1.2.2 and 4.1.2.4).

The Machinery Directive 2006/42/EC, however, requires that:

"Machinery must be designed and constructed in such a way as to avoid any risk of explosion posed
by the machinery itself or by gases, liquids, dust, vapours or other substances produced or used by
the machinery.

Machinery must comply, as far as the risk of explosion due to its use in a potentially explosive
atmosphere is concerned, with the provisions of the specific Community Directives." (Annex I, §
1.5.7)

See also the "Guide to application of the Machinery Directive 2006/42/EC", § 91 and § 228.

It is therefore evident that equipment, protective systems and components intended for use in this
potentially explosive atmosphere – and safety and controlling devices outside, but contributing to
their safe functioning – are within the scope of the ATEX Directive 94/9/EC. It is understood that
the latter applies provided that "atmospheric conditions" in the sense of Directive 94/9/EC are
present in the machine.

In this context the following questions have arisen:

1. Has the manufacturer the obligation to perform a zone classification inside this machinery?

It has been considered that:

- 29 -

• The manufacturer has to carry out a risk analysis, including the risk of explosion;

• Annex I to the ATEX Directive 94/9/EC contains clear and unambiguous definitions
concerning the place where they are intended to be used for every single equipment-group
and category;

• as opposed to the fully harmonising scope of the Machinery Directive, the zone concept
applied in the framework of the ATEX "user" Directive 1999/92/EC allows member states
to apply more stringent requirements than those defined in this Directive.

In order to avoid a non harmonised approach in the framework of a fully harmonised field like the
Machinery Directive, it is not necessary to apply the zone concept as it is defined in Directive
1999/92/EC. Instead, the manufacturer should:

• Carry out the risk assessment;

• Define the requirements of the equipment to be used inside the potentially explosive
atmosphere – and of safety and controlling devices outside, but contributing to their safe
functioning – in order to ensure full compliance of the machinery with the requirements of
the Machinery Directive;

• Purchase or produce the equipment having those requirements, i.e. intended to be used
under the conditions defined during the risk analysis, and in conformity to Directive
94/9/EC.

2. Must the ‘non-electrical’ equipment used inside this machinery be also in conformity to
94/9/EC?

The equipment used inside must be in conformity to the applicable legislation. When the original
Machinery Directive 89/392/EEC was drafted, European Directives regulated only electrical
equipment for use in potentially explosive atmospheres; therefore non-electrical equipment was not
mentioned.

It is nevertheless common understanding of the Standing Committee that after the date of application
of Directive 94/9/EC, both electrical and non-electrical equipment used in machinery having a
potentially explosive atmosphere inside must comply with Directive 94/9/EC. This position is also
reflected in the Machinery Directive 2006/42/EC.

4.1.2.4 Interface to different potentially explosive atmospheres

This point seeks to provide guidance on the application of ATEX Directive 94/9/EC to equipment24
intended to operate with interfaces to different potentially explosive atmospheres.

At this point it is necessary to note that equipment that contains a potentially explosive atmosphere
but is neither connected to, nor intended for use in, an external or process related potentially
explosive atmosphere does not fall under the scope of Directive 94/9/EC. However, any equipment
inside this "container" will, so long as it fulfils the criteria for inclusion in scope, need to comply
with the relevant provisions.

The categorisation of equipment is to be determined on the basis of the ignition risk assessment25 by
the manufacturer or his authorised representative and the equipment's relationship with respect to its
interface with its process atmosphere and any external atmosphere.

The following diagram illustrates this point:

24
Equipment here is taken to mean all products within scope of Directive 94/9/EC.
25
The category classification is performed by the person responsible for making the EC Declaration of
Conformity according to directive 94/9/EC.

- 30 -

For example, the inside or process side of a pump for flammable liquid which normally runs full but
occasionally contains an explosive atmosphere may, depending on the actual situation, be
considered Zone 126 if no other measures have been taken to prevent the pump running dry. If it has
been decided that the surroundings or external explosive atmosphere is Zone 2 then a pump
conforming to Category 2 inside and Category 3 outside must be used to meet the Essential Health
and Safety Requirements.

Note: the process atmosphere zone (and the respective category) need not necessarily to be the same
for the two connections to the process atmosphere.

The following guidelines may help in the selection of an appropriate category:

The category (or categories) assigned to equipment shall be determined for each part of the
equipment which comes into contact with, or is connected to, a zone with a potentially explosive
atmosphere (see Directive 1999/92/EC).

The category assigned to a piece of equipment intended to contain a potentially explosive
atmosphere not connected to the outside of that equipment is determined by the ignition risk
associated with the outside parts of the equipment, not by its internal atmosphere i.e. only the part of
the equipment which is intended to come into contact with a zone is relevant for the assignment of
the appropriate category.

The category (or categories) assigned to the process connecting points of equipment containing an
explosive atmosphere cannot be higher than that appropriate to the ignition risk.

For example, consider the case of a fan conveying an explosive gas atmosphere over its rotating
blades, or a powder mill producing an explosive dust atmosphere inside the mill. Each having an
outlet connected to an external potentially explosive atmosphere. The ignition risk assessment for
both these items of equipment has shown for these specific examples that an effective ignition source
(for the explosive atmosphere connected to them) is not present in normal operation but may be
present in the case of an expected malfunction. If such equipment/assembly is placed on the market
without additional ignition protection or a protective system it can only be classified as Category 327.

Such equipment can only be used when it is connected to an explosive atmosphere which is present
continuously (i.e. Zone 0/20) if additional ignition protection or a protective system is fitted (see
Directive 1999/92/EC).

Where a piece of equipment is fitted with an autonomous protective system such as flame arresters,
or a suppression system which is already compliant to Directive 94/9/EC, additional testing and
conformity assessment of the resulting assembly, i.e. equipment together with the protective system,
is not required provided the protective system is used within its intended design capabilities covering

26
"Zoning" is not a concept to be found in Directive 94/9/EC but in Directive 1999/92/EC dealing with
employer's obligations with respect to employees operating in hazardous atmospheres. It is not the
responsibility of the manufacturer to "zone" but evidently this it is helpful to give an example of the
area of intended use.
27
Additional measures to cover expected malfunctions may provide Category 2; if two faults or one rare
fault are dealt with, Category 1 can be reached.

- 31 -

the specific case, is installed in accordance with the manufacturer's instructions and no new ignition
hazards are introduced. However, an ignition risk assessment will be required and relevant action
taken (see section 3.7.5 on assemblies) if additional hazards are identified.

Similarly, Directive 94/9/EC does not require that the pressure resistance of a vessel or container
protected against the effects of an explosion by an autonomous protective system be tested, if it has
been demonstrated that the autonomous protective system successfully detects and suppresses an
explosion and if the vessel can withstand the residual pressure peak of the suppressed explosion.

Example

NOTE: The following is one of many examples that can be used to illustrate the above points. The
assumptions made in this example should not be taken as the only possible situation. The
categorisation of a particular piece of equipment will depend on the specific ignition hazard
assessment that is made of the equipment and its intended use together with any ignition protection
measures applied. The example only considers the inside and connecting explosive atmospheres, i.e.
the process side. A separate ignition hazard assessment and categorisation must be made of the
outside if the equipment is to be used in potentially explosive atmosphere.

Consider a powder mill as shown in the following figure:

Inlet

Mill

Outlet
The ignition hazard assessment carried out by the manufacturer has identified that in this case:

• there is no ignition source inside the mill which can become effective in normal operation28;

• there is an ignition source inside the mill which can become effective during expected
malfunctions.

The highest category that can be assigned to the mill is therefore Category 3 when it is placed on the
market as shown. The outlet from the mill in this case produces fine dust in the form of a potentially
explosive dust cloud which is continuously present in normal operation, i.e. Zone 20. The
manufacturer's instructions must therefore make clear that the mill can only be used with additional
explosion prevention or protection measures.

Analysis

Directive 94/9/EC defines equipment as follows:

- intended for use in potentially explosive atmospheres;

- and/ or for the processing of material;

- capable of causing an explosion through their own potential sources of ignition.

28
It is clear that for some milling technologies an ignition source may be unavoidable.

- 32 -

This definition applies to the grinding assembly of a mill for combustible materials of the food and
fodder industry. Therefore, these are within the scope of Directive 94/9/EC.

The intended purpose of a grinding assembly in a mill is the grinding of combustible materials
whereby the content of fine particles is increased considerably.

According to the risk assessment the grinding installation should fulfil the requirements for Category
1, but in the best case it will meet Category 3. Despite all construction measures to prevent ignition
sources, the occurrence of dust explosions can not be excluded definitely. Therefore, the mill when
fully installed must be provided with additional protection measures, which reduce the effect of a
dust explosion for people and goods to below a dangerous level.

These measures are essential for the grinding system to fulfil the requirements of Directive 94/9/EC.

Consequently:

• all requirements on the construction of the grinding assembly (e.g. suitable selection of material
and bearings, minimum distances between rotating and fixed parts), on certain equipment of the
mill (e.g. foreign particles separator, overload protection, temperature detector at the bearings)

and

• all construction measures of the mill (explosion pressure resistant design for the maximum
explosion pressure, or explosion pressure resistant design for the reduced explosion pressure in
combination with explosion pressure relief or explosion suppression, and in most cases
additional explosion decoupling for connected installations)

are necessary to make the grinding operation safe.

4.2 Defining group and category

The Directive divides equipment into two groups. In order to determine the appropriate conformity
assessment procedure, the manufacturer must first come to a decision based on the intended use, as
to which group and category the product belongs.

Note: devices have to follow the conformity assessment procedure according to the category of the
equipment or protective system they are required for or contribute to. Devices and components may
be suitable for one or more category or group of equipment.

Group I comprises equipment intended for use in the underground parts of mines, and to those parts
of surface installations of such mines, likely to become endangered by firedamp and/or combustible
dust;

Group II comprises equipment intended for use in other places likely to become endangered by
explosive atmospheres.

These Groups are sub-divided into Categories, as shown below. The way in which this
categorisation has been developed highlights one of the main distinctions of Group I and II. For
Group I, the categorisation depends on (amongst other factors) whether the product is to be de-
energised in the event of an explosive atmosphere occurring. For Group II, it depends where the
product is intended to be used in and whether a potentially explosive atmosphere, is always present,
or is likely to occur for a long or a short period of time.

4.2.1 Group I

Category M1

Products of this category are required to remain functional for safety reasons when an explosive
atmosphere is present and is characterised by integrated explosion protection measures functioning
in such a way that:

- 33 -

• in the event of failure of one integrated measure, at least a second means of protection provides
for a sufficient level of safety; or,

• in the event of two faults occurring independently of each other, a sufficient level of safety is
ensured.29

Category M2

These products are intended to be de-energised in the event of an explosive atmosphere.

It is nonetheless foreseeable that explosive atmospheres could occur during the operation of
Category M2 equipment, as the equipment might not be de-energised immediately. It is therefore
necessary to incorporate protection measures, which provide a high level of safety. The protection
measures relating to products of this category provide a sufficient level of safety during normal
operation even in the event of more severe operating conditions arising, from rough handling and
changing environmental conditions.30 This normally includes also the requirement to provide
equipment with a sufficient level of safety in the event of operating faults or in dangerous operating
conditions which normally have to be taken into account.

4.2.2 Group II

Category 1 comprises products designed to be capable of remaining within its operational
parameters, stated by the manufacturer, and ensuring a very high level of protection for its intended
use in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or
air/dusts mixtures are highly likely to occur and are present continuously, for long periods of time or
frequently.

Equipment of this category is characterised by integrated explosion protection measures functioning
in such a way that:

• in the event of a failure of one integrated measure, at least a second independent means of
protection provides for a sufficient level of safety; or,

• in the event of two faults occurring independently of each other a sufficient level of safety is
ensured31

It is also considered that equipment may be classed as Category 1, if the manufacturer provides a
combination of protective measures to prevent an ignition source becoming active under fault
conditions, and in addition an integrated protective system (see chapter 3.8) which will control the
ignition hazard from a rare malfunction of the equipment.

Category 2 comprises products designed to be capable of remaining within their operational
parameters, stated by the manufacturer, and based on a high level of protection for their intended
use, in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or
air/dust mixtures are likely to occur.

The explosion protection relating to this category must function in such a way as to provide a
sufficient level of safety even in the event of equipment with operating faults or in dangerous
operating conditions which normally have to be taken into account32.

Category 3 comprises products designed to be capable of keeping within its operational parameters,
stated by the manufacturer, and based upon a normal level of protection for its intended use,
considering areas in which explosive atmospheres caused by mixtures of air and gases, vapours,

29
Products relating to this Category must also comply with the supplementary requirements as detailed at
Annex II, paragraph 2.0.1 to Directive 94/9/EC.
30
Annex II, paragraph 2.0.2 to Directive 94/9/EC.
31
Annex II, paragraph 2.1 to Directive 94/9/EC.
32

- 34 -

mists or air/dust mixtures are unlikely to occur and if they do occur, do so infrequently and for a
short period of time only.

The design of the products of this category must provide a sufficient level of safety during normal
operation33.

4.2.3 Levels of Protection for various Categories of Equipment

The various categories of equipment must be capable of functioning in conformity with the
operational parameters established by the manufacturer to a certain level of protection.

Table 3: Levels of Protection

LEVEL OF CATEGORY PERFORMANCE OF CONDITIONS OF
PROTECTION GROUP I GROUP II PROTECTION OPERATION*

Two independent means of protection Equipment remains energised
Very High M1 or safe even when two faults occur and functioning when explosive
independently of each other. atmosphere present
Two independent means of protection Equipment remains energised
Very High 1 or safe even when two faults occur and functioning in Zones 0,1,2
independently of each other. (G) and/or 20, 21, 22 (D)
Suitable for normal operation and Equipment de-energised when
High M2 severe operating conditions. If explosive atmosphere is
applicable also suitable for frequently recognised
occurring disturbances or for faults
which are normally taken into account.
Suitable for normal operation and Equipment remains energised
High 2 frequently occurring disturbances or and functioning in Zones 1,
equipment where faults are normally 2 (G) and/or 21, 22 (D)
taken into account.
Suitable for normal operation. Equipment remains energised
Normal 3 and functioning in Zone 2 (G)
and/or 22 (D)
* Note: see as well the directives on minimum requirements for improving the safety and health protection of
workers operating in potentially explosive atmospheres, e.g. those indicated in footnote 7. The equipment in the
various categories must also comply with the relevant essential and supplementary requirements detailed in
Annex II to the Directive (Essential Health and Safety Requirements).

4.3 Risk Assessment for Products

In general it can be stated that compliance with the Essential Health and Safety Requirements of
Directive 94/9/EC is imperative in order to ensure the explosion proofing of equipment and protective
systems. The requirements are intended to take account of existing or potential hazards deriving from
the design and construction. However, following the philosophy of ATEX Directive 94/9/EC the
notion of intended use is of prime importance too. It is also essential that manufacturers supply full
information.

To meet the requirements of Directive 94/9/EC it is therefore absolutely necessary to conduct a risk
assessment process. According to Annex II, 1.0.1 manufacturers are under an obligation to design
equipment and protective systems from the point of view of integrated explosion safety. Integrated
explosion safety is conceived to prevent the formation of explosive atmospheres as well as sources of
ignition and, should an explosion nevertheless occur, to halt it immediately and / or to limit its effects.
In this connection, the manufacturer must take measures with respect to the risks of explosion.
However, in most cases he will not be in the position to understand the possible extent of the adverse
consequences of an explosion (as part of the overall explosion risk) since this is solely dependant on
the particular circumstances at the users` premises. So the manufacturer's risk assessment will in
general be restricted and be focussed to the assessment of the ignition hazard (again part of the
explosion risk) or the explosion control function for a protective system and safety devices. In
addition, as required in Annex II, 1.0.2 to the Directive, equipment and protective systems must be
33

- 35 -

designed and manufactured after due analysis of possible technical and operating faults in order as far
as possible to preclude dangerous situations.

Bearing in mind the commitments resulting from the relevant requirements of Directive 94/9/EC, a
methodology on risk assessment, i.e. here ignition hazard assessment, should not only deal with
designing and construction aspects but also provide a common format or language between designers
and users.

Methods and/or techniques that could be applied

There are many possible methods and/or techniques for risk assessment, especially for hazard
identification. They can easily be adopted for the ignition hazard assessment explained above as
follows:

A good identification technique has the following attributes:

- it is systematic, i.e. it guides the parties concerned so that all parts of the system, all phases
of use and all reasonably anticipated hazards are considered;

- it employs brainstorming.

By using more than one technique the possibility of overlooking any relevant hazard is minimised.
However, the additional time employed in using more than one technique needs to be balanced
against the increased confidence in the results. The main output from the hazard identification stage is
a numbered listing of hazardous events, which could result from the products involved as an input to
the risk estimation stage.

Hazard assessment methodology should comprise the hazard profiles including the accidental
parameters that can reasonably be anticipated. These aspects become subject to a hazard assessment
as a "series of logical steps to enable, in a systematic way, the examination of the hazards associated
with products".

In principle the hazard assessment comprises of four steps34:

a) Hazard identification: A systematic procedure for finding all of the hazards, which are
associated with the products. Once a hazard has been recognized, the design can be changed to
minimise it, whether or not the degree of risk has been estimated. Unless the hazard is
recognized it cannot be addressed in the design.

b) Hazard estimation: Determination of the Probability of occurrence of the identified hazards
(and of the levels of severity of the possible harm of the considered hazards, see as well EN
1050).

c) Hazard evaluation: Comparison of the hazards estimated with criteria in order to decide
whether the risk is acceptable or whether the product design must be modified in order to
reduce the risk.

d) Hazard reduction option analysis: The final step of hazard assessment is the process of
identifying, selecting and modifying design changes which might reduce the overall risk from
products. Although risks can always be reduced further they can seldom be reduced to zero
except by eliminating the activities.

Options, which address the hazardous events that make the greatest contributions to the total risk,
have the greatest potential to reduce risk. Effectiveness in reducing risk always starts with changes to
the design concept, i.e. inherently safe design.

34
For further information on risk assessment, see EN 1127-1 Explosive atmospheres - Explosion
prevention and protection - Part 1: Basic concepts and methodology. For worked examples see EN
13463-1 Non-electrical equipment for use in potential explosive atmospheres - Part 1: Basic methods
and requirements.

- 36 -

5 EQUIPMENT NOT IN THE SCOPE OF DIRECTIVE 94/9/EC
5.1 Exclusions based on Article 1.4 of Directive 94/9/EC

• medical devices intended for use in a medical environment;

• equipment and protective systems where the explosion hazard results exclusively from the
presence of explosive substances or unstable chemical substances;

• equipment intended for use in domestic and non-commercial environments where potentially
explosive atmospheres may only rarely be created, solely as a result of the accidental leakage of
fuel gas. The question has also been discussed as to whether this implicitly conveys the meaning
that equipment intended for use in domestic and non-commercial environments, where the
leakage is not fuel gas, are included within scope. It was agreed by the ATEX Standing
Committee as a general rule such types of equipment are excluded from Directive 94/9/EC as
they are not intended for use in a potentially explosive atmosphere;

• personal protective equipment covered by Directive 89/686/EEC35. There are occasions where
personal protective equipment with its own potential sources of ignition is intended for use in
potentially explosive atmospheres. This type of personal protective equipment should follow the
procedures laid down in Directive 94/9/EC to provide the necessary level of explosion safety (see
as well chapter 6);

• seagoing vessels and mobile offshore units together with equipment on board such vessels or
units, as they are already covered by the IMO Convention.

• means of transport i.e. vehicles and their trailers intended solely for transporting passengers by
air, road, rail or water networks, as well as means of transport in so far as such means are
designed for transporting goods by air, by public road or rail networks or by water. Means of
transport intended for use in a potentially explosive atmosphere are not excluded;

• equipment covered by Article 296 (1)(b) of the EC Treaty, i.e. designed and manufactured
specifically for use by the armed forces or in the maintenance of law and order. Dual-purpose
equipment is not excluded.

5.2 Examples for equipment not covered by Directive 94/9/EC

5.2.1 "Simple" products

For "simple" electrical products, European harmonised standards provide a good basis to assess the
effectiveness of electrical ignition source and, consequently, to determine whether or not these can
be considered effective or not.

In general, many simple mechanical products do not fall under the scope of Directive 94/9/EC as
they do not have their own source of ignition (see chapter 3.7.2). Examples without own source of
ignition are hand tools such as hammers, spanners, saws and ladders.

Other examples that in most cases have no potential ignition source are given below. However, the
manufacturer will need to consider each item in turn with respect to potential ignition hazard to
consider whether Directive 94/9/EC applies (see also chapter 3.7.3):

• Clockwork time pieces; mechanical camera shutters (metallic);

• Pressure relief valves, self-closing doors;

35
OJ L 399, 30.12.1989, amended by Directive 93/95/EEC, OJ L 276, 9.11.1993 and Directive
93/68/EEC, OJ L 220, 30.8.1993.

- 37 -

• Equipment moved only by human power, a hand operated pump, hand powered lifting
equipment, hand operated valves.

The issue of hand operated valves has also been discussed. Given that these will move slowly, with
no possibility of forming hot surfaces, as discussed in section 3.7.3 they are not in scope of the
Directive. Some designs incorporate polymeric parts, which could become charged, but this is no
different from plastic pipes. Given that it is clear that the latter is outside of the scope of Directive
94/9/EC it has been accepted that such valves do not fall within scope.

Some manufacturers have argued that their valves are specially adapted for ATEX, in that they have
either selected more conductive polymers, or taken steps to ensure that no metal parts could become
charged because they are unearthed. Other manufacturers state that all their valves meet this
requirement simply by the way they are constructed, and they see no distinction from valves used to
process non-flammable materials. To avoid confusion between those who claim correctly that their
valves have no source of ignition, and are out of scope, and those who claim that they have done
some very simple design change and wish to claim that their valves are now Category 2 or even 1, it
has been agreed that valves having characteristics as described above are out of scope. Nevertheless,
as discussed in section 3.7.3, where potentially flammable atmospheres exist, users must always
consider the electrostatic ignition risks.

5.2.2 Installations

The Directive does not regulate the process of installation. Installing such equipment will generally
be subject to legal requirements either workplace directives (see footnote 7) or the domestic
legislation of the Member States.

However, the question is frequently asked to distinguish between the responsibilities of
manufacturers, building a piece of equipment or an assembly under the ATEX Directive 94/9/EC
and those responsibilities of an end user, buying in equipment parts to build an installation. (One
might use the analogy of the difference between the manufacturing a discreet piece of equipment
which can be placed on the market, such as a television (LVD 2006/95/EC), and equipping a house
with all its utilities built into which a range of products will be installed and connected, this would
clearly be an installation and come under Workplace Directive 89/391/EEC or other directives
concerning workplace safety.)

A common situation is that pieces of already compliant equipment are placed on the market
independently by one or more manufacturer(s), and are not placed on the market by a single legal
person as a single functional unit (as described in 3.7.5.1). Combining such equipment and installing
at the user's premises is not considered as manufacturing and thus does not result in equipment; the
result of such an operation is an installation and is outside the scope of Directive 94/9/EC. The
installer has to ensure that the initially compliant pieces of equipment still comply when they are
taken into service. For that reason he has to carefully follow all installation instructions of the
manufacturers. The Directive does not regulate the process of installation. Installing such equipment
will generally be subject to legal requirements of the Member States. An example could be
instrumentation consisting of a sensor, a transmitter, a Zener barrier and a power supply if provided
by several different manufacturers installed under the responsibility of the user.

It is understood that there is not always a clear line between an installation and an assembly.

For assemblies and installations the responsibilities will either fall on the person who places the
assembly on the market, or the end-user. Each must draw up a technical file setting out how they
have complied with the relevant legislation. Much of the technical content will be the same.

The plant will usually be an installation if:

• The end user, or an installer purchases parts (including ATEX components or equipment)
from different manufacturers and they are installed under his responsibility after a full risk
assessment has been undertaken;

• The user carries out a whole series of different processes requiring the integration of mainly
ATEX compliant equipment and parts on site, and they are installed according to a unique
layout;

- 38 -

• The end-user commissions the building of parts of his installation off-site, which may be
unique, but certainly not a production run, and which is done under his direct responsibility,
or indirectly through a contractor, working under contract to him;

• Commissioning tests or adjustments are needed once the plant is built and are carried out
under the final responsibility of the end user.

- 39 -

6 APPLICATION OF DIRECTIVE 94/9/EC ALONGSIDE
OTHERS THAT MAY APPLY
In principle if a product is within the scope of other directives at the same time, all directives have to
be applied in parallel to fulfil the provisions of each directive.

6.1 Electromagnetic Compatibility 2004/108/EC (EMC)

In the case of Directive 94/9/EC and the Directive relating to Electromagnetic Compatibility
2004/108/EC (EMC), the Directive 94/9/EC has to be applied to fulfil the requirements concerning
"explosive atmospheres" safety requirements. The EMC Directive must also be applied so as to
ensure that the product does not cause electromagnetic disturbance and that its normal operation is
not affected by such disturbances. There will be some applications, where the "normal" level for
electromagnetic immunity provided by Directive 2004/108/EC might not be sufficient for granting
the necessary immunity level for safe performance under the scope of Directive 94/9/EC. In this case
the manufacturer is required to specify the electromagnetic immunity achieved by his products
according to Annex II 1.2.7 to Directive 94/9/EC. For example, protective systems where the
performance of data acquisition and data transmission may have direct influence on explosion safety.

6.2 Low Voltage 2006/95/EC (LVD)

Products for use in potentially explosive atmospheres are explicitly excluded from the scope of the
Low Voltage Directive 2006/95/EC (LVD). All "Low Voltage essential objectives" have to be
covered by the Directive 94/9/EC (see Annex II 1.2.7). The standards published in the Official
Journal of the European Union with reference to Directive 2006/95/EC may be listed in the EC
declaration of conformity to fulfil the requirements 1.2.7 of Annex II to Directive 94/9/EC. Not
excluded from the scope of the LVD are the safety, controlling and regulating devices mentioned in
Article 1(2) of the Directive 94/9/EC which are intended for use outside potentially explosive
atmospheres but required for or contributing to the safe functioning of equipment and protective
systems. In such cases both Directives shall be applied.

6.3 Machinery 2006/42/EC (MD)

The relation between Directive 94/9/EC and the Machinery Directive 2006/42/EC is different. The
Directive 94/9/EC, which is a "specific Directive" within the meaning of Article 3 of the Machinery
Directive, contains very specific and detailed requirements to avoid hazards due to potentially
explosive atmospheres, while the Machinery Directive itself contains only very general requirements
against explosion hazards (Annex I, 1.5.7 MD). With regard to explosion protection in a potentially
explosive atmosphere Directive 94/9/EC takes precedence and has to be applied. So equipment that
complies with ATEX, and which is also a machine can be assumed to comply with the specific
essential safety requirements concerning ignition risk with respect to explosive atmospheres in the
Machinery Directive. For other relevant risks concerning machines, the requirements of the
Machinery Directive also have to be applied.

See also § 4.1.2.3.

6.4 Transport of dangerous goods by road 94/55/EC and 98/91/EC (ADR)

In order to avoid possible overlapping with Directives 94/55/EC and 98/91/EC on transport of
dangerous goods by road most means of transport have been excluded from the scope of Directive
94/9/EC (Art. 1 (4)). Generally, those vehicles still included in 94/9/EC do not leave the user's
premises. Typical examples are means of transport on rails used in "gassy" mines, forklift trucks and
other mobile machinery where the internal combustion engine, braking systems and electrical
circuits may be potential sources of ignition.

It is possible for both Directives to be applied in parallel. For example, where the manufacturer
designs and constructs a means of transportation intended for transporting dangerous (in this case
flammable) goods on public roads as well as for use in areas where explosive atmospheres may exist.

- 40 -

The criteria for application of Directive 94/9/EC are that the vehicle would need to:

• be defined as an equipment, a protective system or safety device according to Article 1(2) of the
Directive;

• have its own potential source of ignition;

• be intended for use in a potentially explosive atmosphere36.

In order to determine under which intended conditions both Directives will apply the exclusion at
Article 1(4) of Directive 94/9/EC needs to be considered.

This exclusion explicitly determines that "means of transport" except those "intended for use in a
potentially explosive atmosphere shall not be excluded".

The definition of "means of transport" is given further detail at Article 2 of Directive 98/91/EC and,
in broad terms, is interpreted to be an activity on a public highway or space including unloading and
loading operations.

The ATEX Standing Committee therefore considered that, as described in the Commission guidance,
a vehicle under the scope of Directive 98/91/EC might also be covered by the ATEX Directive
94/9/EC.

Where such a vehicle is intended for use in a potentially explosive atmosphere both Directives will
apply. However, this does not include where such environments are likely to occur solely as a result
of loading and unloading operations as described in 98/91/EC. An example of this is a road tanker
transporting petrol when the loading/unloading site is such that it is not initially considered to have a
potentially explosive atmosphere because of its location with respect to the storage facility. As noted
above, if this environment becomes potentially explosive because of the loading/unloading
operation, only the requirements of Directive 98/91/EC need be applied.

In addition, it was agreed that the conformity assessment and technical requirements of 94/55/EC as
further defined by 98/91/EC may not fully align with those required for compliance to Directive
94/9/EC.

In this context the question arose whether manufacturers of internal monitoring or other devices
attached to or inside a vehicle such as a petrol tanker have to apply the ATEX Directive 94/9/EC and
to affix CE marking? The following has been concluded:

1. Based on Article 75 of the EC Treaty and transposing the ADR, Directive 94/55/EC fully
harmonises rules for the safe transport of dangerous goods by road.

2. Additionally, based on Article 95 of the EC Treaty, Directive 98/91/EC provides for full
harmonisation regarding technical requirements for the following categories of vehicles intended for
the transport of dangerous goods by road as follows:

• Category N: Motor vehicles having at least four wheels when the maximum weight exceeds 3.75
metric tons, or having three wheels when the maximum weight exceeds 1 metric ton, and used
for the carriage of goods.

• Category O: Trailers (including semi-trailers).

According to Article 4, if the requirements of the Annexes of this Directive are fulfilled for the
completed vehicle, Member States may not refuse to grant EC type approval or to grant national type
approval, or prohibit the registration, sale or entry into service of those vehicles on grounds relating
to the transport of dangerous goods.

3. Directive 98/91/EC contains, by reference to Directive 94/55/EC, requirements covering both
electrical (e.g. wiring, batteries) and non electrical equipment (e.g. heat protection of engine,

36
Unless it is a safety device as defined under Article 1(2) of Directive 94/9/EC.

- 41 -

combustion heaters) of vehicles designed for the carriage of dangerous goods, which may contribute
towards the formation of explosive atmospheres.

4. Provided that:

- Such vehicles are not intended for use in a potentially explosive atmosphere other than that caused
temporarily by loading or unloading.

• The goods, which shall be transported, are substances and articles as defined in Article 2 of
Directive 94/55/EC.

• The exemptions of Annex A, paragraph 1.1.3, of Directive 94/55/EC and the ADR agreement are
not pertinent.

Under these circumstances the exclusion at Article 1(4) of Directive 94/9/EC applies to the WHOLE
of the vehicle including ALL associated equipment necessary for the carriage of dangerous goods
(e.g. "breather valves" of manhole covers, vehicle tracking systems).

In all other cases Directive 94/9/EC may apply.

Note 1: At some sites tankers may have to access a zone (e.g. Zone 1). In this case users responsible
for that site may demand the supplier to use tankers with ATEX compliant products.

Note 2: Even if the vehicle or parts of it are intended to be permanently used in a potentially
explosive atmosphere, devices like "breather valves" of manhole covers normally would not fall
within the scope of Directive 94/9/EC. Normally these devices have no own ignition source, are no
safety devices in the sense of ATEX and are normally not provided with a protective system, such as
a flame arrester.

6.5 Personal Protective Equipment 89/686/EEC (PPE)

The equipment covered by the Personal Protective Equipment (PPE) Directive 89/686/EEC is
specifically excluded from Directive 94/9/EC. However, the manufacture of PPE for use in
explosive atmospheres is covered by Basic Health and Safety Requirement 2.6 in Annex II to the
PPE Directive. PPE intended for use in explosive atmospheres must be so designed and
manufactured that it cannot be the source of an electric, electrostatic or impact-induced arc or spark
likely to cause an explosive mixture to ignite. Following the EHSRs in Directive 94/9/EC is one way
to demonstrate compliance.

6.6 Pressure Equipment 97/23/EC (PED)

Pressure Equipment Directive (PED) 97/23/EC is a single market directive similar to Directive
94/9/EC. Relatively few items of pressure equipment have their own source of ignition. There are a
small number of examples of safety accessories which may be autonomous protective systems or,
possibly, equipment. Flame arrestors have been judged to be pressure accessories in the sense of the
PED. There are no additional requirements for the flame arrester element under the PED. PED
specifically excludes from its own scope equipment classified no higher than Category I under
Article 9 of PED but inside the scope of ATEX.

The Pressure Equipment Directive deals only with the pressure hazard and does not consider the
prevention of and protection against explosions/inflammations, which are not triggered by pressure.
In most cases it is presumed that PED equipment does not have an own ignition source when it is
properly installed according to the instructions of the manufacturer (including information about
maintenance and repair of the connecting devices, e.g. valves, flanges). If such PED equipment
shows hot surfaces occurring during operation caused by the temperature of its content solely, it is
not applicable to consider this equipment under the ATEX Directive 94/9/EC.

6.7 Simple Pressure Vessels 87/404/EEC

Simple Pressure Vessel Directive 87/404/EEC applies to a limited range of equipment for holding
air or nitrogen under pressure. ATEX equipment may incorporate a simple pressure vessel in an

- 42 -

assembly, but it is considered that there are relatively few occasions when both Directives will apply
to the same product.

6.8 Gas Appliances 90/396/EEC (GAD)

Gas Appliances Directive (GAD) 90/396/EEC applies to equipment for domestic and non
commercial use but does not apply to equipment designed for industrial processes. Most equipment
within scope of GAD is capable of igniting a surrounding explosive atmosphere and cannot comply
with ATEX.

It should also be noted that the Directive 94/9/EC contains the following exclusion:

"- equipment intended for use in domestic and non-commercial environments where potentially
explosive atmospheres may only rarely be created, solely as a result of the accidental leakage of fuel
gas;"

The question has been raised as to whether this implicitly conveys the meaning that such equipment,
where the leakage is not fuel gas, are included in the scope of ATEX Directive 94/9/EC.

It was agreed that, as a general rule, such types of equipment are excluded from the Directive as they
are not intended for use in a potentially explosive atmosphere.

6.9 Construction Products 89/106/EEC (CPD)

Besides the above Directives it is necessary to mention the relationship between Directive 94/9/EC
and the Construction Products Directive (CPD) 89/106/EEC. During the standardisation work for
both Directives it was identified that (in a few areas) the scopes of both Directives could overlap.
The areas already identified where:

• explosion protection systems and fire suppression systems using the same media;

• both areas are using common hardware for distribution systems such as pipes, pipe hangers,
nozzles, etc.

In general, it can be stated that in cases of doubt the Construction Products Directive is applicable if
the subject under discussion is fixed to a building and becomes then a part of the building or if it can
be seen as a building itself (e.g. a silo). In such instances the CPD and the ATEX Directive 94/9/EC
apply in parallel. Compliance with the EHSRs of Directive 94/9/EC will in general show compliance
with the EHSRs of the CPD regarding ignition hazards.

In this context it is important to note, that a Notified Body is only allowed to cover aspects
related to two or more directives if the Body is notified under all directives with an
appropriate scope.

6.10 Marine Equipment Directive 96/98/EC (MED)

The Marine Equipment Directive (MED) 96/98/EC is not a "New Approach" Directive, as it is
based on the principles of the "Global Approach" and does not provide for CE marking. Directive
94/9/EC specifically excludes from its scope "seagoing vessels and mobile offshore units together
with equipment on board such vessels or units", and equipment for use on board a ship is subject
only to the MED directive, excluding all others. Nevertheless, the constructional requirements for
explosion-protected equipment at sea are generally the same as onshore: this is illustrated by the
reference of the MED to the same or very similar standards, as harmonised under the ATEX
Directive. In fact, certain products (as gas detection equipment) are used offshore and onshore, thus
requiring certification per the ATEX Directive and/or by the MED, according to their intended use.

- 43 -

7 USED, REPAIRED OR MODIFIED PRODUCTS AND SPARE
PARTS 37
7.1 General

As a general rule, manufacturers need to consider whether the product is being placed onto the EU
market or taken into service for the first time, or if the modifications are such that the intention or the
result is to place a product onto the market, which has to be considered as a new product. If the
answer to either of these questions is "yes", then Directive 94/9/EC fully applies. In all other cases
the Directive 94/9/EC does not apply and the responsible person will have to ensure that any other
relevant national or EU legislation are considered as appropriate.

Within this context two points should be made:

• In the following paragraphs, these Guidelines refer only to products for which Directive
94/9/EC is potentially applicable. Products not subject to Directive 94/9/EC are therefore
excluded from these discussions.

• The application of Directive 94/9/EC to an "as new" product is without any prejudice to
intellectual property legislation.38

With regard to the information to be provided for repair of equipment, see § 10.1.3 "Documents
accompanying the product".

7.2 Definitions

Used product and second hand product: a product which has been placed on the EU market prior
to the coming into force of Directive 94/9/EC and put into service on the EU territory. This product
was in compliance with the then applicable legislation: national or EU, depending on the date. The
ATEX Directive 94/9/EC does not apply.

Used products that were on the market and used in the EU before the date of entry into force of
Directive 94/9/EC are not covered by it. These products have been marketed and used in accordance
with the regulations in force at that time. They circulate in the EU based on Articles 28/30 of the EC
Treaty unless they are modified so that health and safety characteristics have been affected.

For used products imported from a non EU country and made available for the first time in the
EU after 30 June 2003 for the purpose of distribution and/or use in the EU Directive 94/9/EC shall
apply.

7.3 Reconditioned (or refurbished39) products

These are used products which were on the market and used in the EU but whose performance has
changed over time (due to ageing, obsolescence, etc.), and which have been modified so as to be
restored. The case of products whose external appearance has been modified and improved by a
cosmetic or aesthetic operation after they have been placed on the market and put into service is a

37
The application of the ATEX Directive to "as-new equipment" is without any prejudice to intellectual
property legislation. See Directive 89/104/EEC relating to the marks and the decision of the European
Court of 11th July 1996, C427/93, 429/93, 436/93 Bristol Meyer Squibb.
38
See Directive 89/104EEC relating to the marks and the decision of the European Court of Justice of 11
July 1996 in Joined Gases C-427/93 and C-436/93 Bristol Meyer Squibb.
39
Both terms, reconditioned/refurbished, as well as reconditioning/refurbishment are used interchangeably
in this chapter.

- 44 -

particular form of refurbishment aimed at restoring the external appearance of the product40. If this
occurs with no substantial modification Directive 94/9/EC does not apply.

7.4 Reconfigured products

Reconfigured products are used products which were on the market and used in the EU but whose
configuration has been modified, by the addition (upgrading) or the removal (downgrading) of one
or more parts (components, sub-assemblies such as plug-in cards or modules, etc.). If this occurs
with no substantial modification Directive 94/9/EC does not apply.

7.5 Substantially modified products

In general, the relevant text of the "Guide to the Implementation of Directives Based on New
Approach and Global Approach" (Blue Guide)41, chapter 2.1. "Products submitted to directives"
applies. In the sense of Directive 94/9/EC it is any modification affecting one or more of the health
and safety characteristics covered by EHSRs (e.g. temperature) or the integrity of a type protection.
In this case Directive 94/9/EC has to be applied. This does not preclude the application of other
relevant directives.

The general principle is that Directive 94/9/EC re-applies to a modified product where the
modification is considered to be substantial and if it is intended to be placed again on the EU
market for distribution and/or use.

7.6 Repaired products

These are products whose functionality has been restored following a defect without adding new
features or any other modification. As this occurs after the product has been placed on the market
and the product is not to be sold as a new product:

The ATEX Directive 94/9/EC does not apply.

This does not preclude that national regulations of the Member States on the working environment
may require some kind of assessment of the repaired product as well.

7.7 Spare parts
These are items intended to replace a defective or worn out part of a product previously placed and
put into service on the EU market. A typical repair operation would be replacement by a spare part.

The manufacturer of the spare part is normally not required to comply with Directive 94/9/EC
unless the spare part represents an equipment or component as defined by the Directive. If so,
all obligations laid down in the Directive have to be fulfilled.

If the manufacturer of the original spare part offers a new, different one in its place (due to technical
progress, discontinued production of the old part, etc.), and it is used for the repair, the repaired
product (as long as no substantial modification of the repaired product takes place) does not need to
be brought into conformity at this time with Directive 94/9/EC as the repaired product is not then
placed on the market and put into service.

40
This can involve a modification of the electrostatic characteristics. The use of different materials or
different external dimensions of the product might adversely change its ATEX performances. For
example, a plastic enclosure may provide much lower electrostatic protection than a metallic enclosure.
41
http://ec.europa.eu/enterprise/policies/single-market-goods/documents/blue-guide.

- 45 -

8 CONFORMITY ASSESSMENT PROCEDURES
8.1 Products conforming to Directive 94/9/EC

Article 8 of the Directive describes the procedures whereby the manufacturer or his authorised
representative established within the EU ensures and declares that the product complies with
Directive 94/9/EC. For assemblies further guidance is given in chapter 3.7.5.

Article 8.1(a) describes the procedures in the case of equipment; autonomous protective systems; for
safety devices for such equipment or systems; and for components for such equipment, systems or
devices, under Groups I and II, Categories M1 and 1. The options are either:

i) EC-Type examination42 (Module B)43 followed by:
production quality assurance44 (Module D) or,
product verification45 (Module F);
ii) Unit verification46(Module G).
Article 8.1(b) describes the procedure in the case of equipment, for safety devices as described in
article 1(2) for such equipment and for components of such equipment or devices, under Groups I
and II, Categories M2 and 2. The options are either:

For electrical equipment and internal combustion engines of Categories M2 and 2:

i) EC-Type examination (Module B) followed by:
conformity to type47 (Module C) or,
product quality assurance48 (Module E)
ii) Unit verification (Module G).

For other equipment of Categories M2 and 2:

i) Internal control of production (Module A) and deposit the technical
documentation49 with a Notified Body50, or,


Article 8.1(c) describes the procedure in the case of equipment; for safety devices for such
equipment; and for components for such equipment and devices under Group II, Category 3. The
options are either:

i) Internal control of production (Module A) or,


42
See Annex III to the Directive.
43
See Council Decision 93/465/EEC of 22 July 1993 concerning the modules for the various phases of the
conformity assessment procedures and the rules for the affixing and use of the CE conformity marking,
which are intended to be used in the technical harmonisation directives (OJ L 220, 30.8.1993, p. 23).
44
See Annex IV to the Directive.
45
See Annex V to the Directive.
46
See Annex IX to the Directive.
47
See Annex VI to the Directive.
48
See Annex VII to the Directive.
49
See paragraph 3 of the Annex relating to the internal control of production.
50
Conditions of storage of documents shall be agreed between the Notified Body and its client.

- 46 -

For safety, controlling and regulating devices:

Safety, controlling and regulating devices have to comply with the requirements of Annex II, clause
1, especially clause 1.5.

The formal conformity assessment procedures of Article 8 apply and the safety devices are assessed
according to the equipment group and category of the system consisting of the safety device and the
equipment under control. In some cases it is necessary to perform the assessment for the
combination (e.g. inverter fed motors), but generally the assessment for a group of equipment and
the appropriate safety devices can be done separately (e.g. type "e" motor).

Example:
A type "e" motor of Category 2 is controlled by an overload protection device located outside the
explosive atmosphere. The conformity assessment procedure of equipment group II and Category 2
is applied for the safety device.

In brief, the different conformity assessment procedures are:

EC Type Examination (Annex III):
Provides a specimen of the envisaged production to a Notified Body which undertakes the necessary
evaluation to determine that the "type" meets the essential requirements of Directive 94/9/EC and
issues an EC Type Examination Certificate.

Production Quality Assurance (Annex IV):
Operates a quality system approved by a Notified Body for production, final equipment inspection
and testing and is subject to on-going surveillance.

Product verification (Annex V):
Examination and tests by a Notified Body of every product to check the conformity of the
equipment, protective system or device with the requirements of Directive 94/9/EC and draw up a
certificate of conformity.

Conformity to type (Annex VI):
Tests carried out by a manufacturer on each piece of equipment manufactured to check the explosion
protection aspects of the design. Carried out under the responsibility of a Notified Body.

Product Quality Assurance (Annex VII):
A quality system approved by a Notified Body for the final inspection and testing of equipment
subject to on-going surveillance.

Internal Control of Production (Annex VIII):
Product and quality system assessment procedure carried out by the manufacturer and retention of
documentation.

Unit verification (Annex IX):
Notified Body examines individual equipment or protective system and carry out tests as defined in
the harmonised standards, if they exist, or otherwise in European, international or national standards
or conduct equivalent tests to ensure conformity with the relevant requirements of Directive 94/9/EC
and draw up a certificate of conformity.

Internal Control of Production + Retention of documentation by a Notified Body (Article
8.1((b)(ii):
Product and quality system assessment procedure carried out by the manufacturer and retention of
documentation by a Notified Body.

A chart showing the appropriate procedure is provided overleaf:

- 47 -

Conformity Assessment Procedures

Equipment of Groups I & II
Categories M 1 and 1 * Equipment of Groups I & II Equipment of
and Autonomous Categories M 2 and 2 * Group II
Protective Systems Category 3 *

EC type Internal combustion Internal control
YES NO
Examination engine or of production
Annex III electrical equipment Annex VIII

and
EC type Internal control
Examination of production
Annex III Annex VIII

Production or Product
QA Verification and
Annex IV Annex V

and

Conformity or Product QA
to type Annex VII
Annex VI

Communicate a
technical documentation
to a Notified Body

OR
Equipment of Groups I & II *
And Autonomous Protective
Systems

Unit verification
Annex IX

(*) and their components and devices according to Art. 1(2), if separately assessed

Note: According to Article 8.4 for all equipment and protective systems of all groups and categories
conformity to 1.2.7 of Annex II of the Directive (protection against other hazards) can be
fulfilled by following the procedure of internal control of production (Annex VIII).

- 48 -

Which conformity assessment procedures have to be performed in the case of different
categories within one product, or mixes of equipment and protective systems according to
Article 1.3 b ?

If a product is made of parts which are assigned to different conformity assessment procedures it will
be up to the manufacturer to decide how these parts and the whole product shall be placed on the
market. The manufacturer can decide to realise the appropriate conformity assessment procedures for
each part or for the whole product, even if he decides to place the product as an entity on the market.
In the case of separate conformity assessment procedures for each part of the assembled equipment
(called assembly in the Guidelines to Directive 94/9/EC), the manufacturer may presume conformity
of these pieces of equipment and may restrict his own risk assessment of the assembly to those
additional ignition and other hazards, which become relevant because of the final combination. If
additional hazards are identified a further conformity assessment of the assembly regarding these
additional risks is necessary.

If the manufacturer explicitly asks a Notified Body to assess the entire product, then that conformity
assessment procedure has to be applied, which covers the highest requirements. The Notified Body
shall include into the EC-Type examination (if relevant) all aspects of the product. Existing
conformity declarations of the manufacturer for parts of the product should be given due
consideration.

The Notified Body should inform the manufacturer about the possibilities of separate conformity
assessment procedures for each part of the assembly as pointed out by the Guidelines to Directive
94/9/EC.

Any certificate issued by the Notified Body should make clear which aspects of the product
have been assessed by the NB, and which have been assessed by the manufacturer alone.

Example: Vapour recovery pump for petrol stations

(a) The pump is sucking the petrol vapour-air mixture from the atmosphere and conveying it in pipe-
work attributed to Zone 0. Accordingly it is connected at its inlet and outlet to a potentially explosive
atmosphere classified as Zone 0. The pump itself is placed in a Zone 1 environment.

With regard to the inlet and outlet connection the pump then has to comply with the requirements for
Category 1 equipment. The corresponding EC-Type examination (equipment) has to be carried out
by a Notified Body. With regard to the remaining (outer) body and integrated parts of the pump the
Notified Body includes the necessary Category 2 assessment into the certification, even if there are
only non-electrical ignition sources to be considered.

Both categories shall be indicated in the EC-Type Examination Certificate, making clear which
aspects of the product have been assessed by the Notified Body, and which have been assessed by
the manufacturer alone, and in the marking. For those Category 2 parts of the pump, which show
only non-electrical ignition sources and which are placed separately on the market, and for which the
technical documentation has been communicated to a Notified Body, an EC declaration of
conformity (for equipment) or a written attestation of conformity (for components) of the
manufacturer are sufficient.

(b) Often the pump is expected to prevent the passage of a deflagration flame from the inlet to the
outlet connection, as typical vapour recovery pumps contain flame arresters in the inlet and outlet
pipe. In this case the pump simultaneously may qualify as a protective system (in-line deflagration
arrester).

A Notified Body – after having carried out a corresponding assessment of the flame arresting
capability – may then issue a separate EC-Type Examination Certificate for the pump as a protective
system. In case that both aspects (equipment and protective system) have been assessed by the same
Notified Body, only one EC-Type Examination Certificate may be issued.

- 49 -

8.2 Exceptional derogations of the Conformity Assessment Procedures

All equipment and protective systems referred to in Article 1 (1) including components and the
devices referred to in Article 1 (2) are covered by the provisions of Article 8 (5).

This article gives the competent authority of the relevant Member State the possibility, in
exceptional circumstances, to authorise the placing on the market and putting into service products
where the Conformity Assessment Procedures have not been applied. This exception is possible:

• following a duly justified and successful request to the competent authority of the relevant
Member State; and,

• if the use of the product is in the interests of protection of health and safety, and where, for
example, such interests would be hindered by the delay associated with Conformity Assessment
Procedures; and,

• is restricted to the territory of the Member State concerned.

This provision may be applied in safety relevant cases, in which the products in question are needed
urgently and there is insufficient time to undergo the complete Conformity Assessment Procedures
(or to complete these procedures). The intention is to give Member States (in the interest of health
and safety) the possibility to allow the placing on the market and putting into service innovative
products without delay. Even in such cases the essential requirements of the Directive must be
fulfilled.

With regard to the restrictive application conditions it has to be emphasised that the use of this
clause has to remain exceptional and must not become a normal procedure. In the interests of
transparency and to assist administrative co-operation Member States are encouraged to provide the
competent Commission services with details of any use of Article 8(5).

- 50 -

9 NOTIFIED BODIES
9.1 Designation

Annex XI to Directive 94/9/EC defines the criteria that these bodies must fulfil. Bodies which are
able to provide proof of their conformity with Annex XI by presenting to their Competent
Authorities a certificate of accreditation and evidence that all additional requirements have been met
or other means of documentary proof as defined below, are considered notifiable and in this respect
they conform to Annex XI of the Directive. The appropriate (voluntary) harmonised standards
provide useful and appropriate mechanisms towards presumption of conformity to Annex XI.
However, this does not rule out the possibility that bodies not conforming to the harmonised
standards may be notified, on the grounds that compliance is obligatory only with respect to the
criteria set out in Annex XI to the Directive.

Notified Bodies provide the professional and independent judgements, which consequently enable
manufacturers or their authorised representatives to fulfil the procedures in order to presume
conformity to Directive 94/9/EC. Their intervention is required:

• for issuing of EC-Type Examination Certificates, and for inspection, verification and testing of
equipment, protective systems, devices and components before they can be placed on the market
and/or put into service;

• for the assessment of manufacturer's quality assurance system in the production phase.

The bodies responsible for undertaking the work referred to in Article 8 of the Directive must be
notified by the Member State under whose jurisdiction they fall, on their own responsibility to the
Commission and the other Member States of the EU. This notification also includes the relevant
scope of competence for which that body has been assessed as technically competent to certify
against the Essential Health and Safety Requirements as shown in the Directive. For the Member
States of the EU, this responsibility of notification involves the obligation to ensure that the Notified
Bodies permanently maintain the technical competence required by Directive 94/9/EC and that they
keep their notifying authorities informed on the performance of their tasks.

Therefore, a Member State of the EU, which does not have a technically competent body under its
jurisdiction to notify, is not required to make such a notification. This means that a Member State of
the EU which does not have such a body is not required to create one if it does not feel the need to
do so. A manufacturer always has the choice of contacting any body with the appropriate scope of
technical competence, which has been notified by a Member State.

On their own responsibility Member States reserve the right not to notify a body and to remove an
appointment. In the latter circumstance the relevant Member States shall inform the Commission and
all other Member States.

For further information concerning Notified Bodies, e.g. responsibilities, conformity assessment,
testing, inspection facilities and sub-contracting, please see the "Guide to the implementation of
Directives based on New Approach and Global Approach" (see footnote 6).

9.2 Co-ordination and Co-operation

All Notified Bodies are asked to participate in Notified Body co-ordination activities. The Group of
Notified Bodies established under Directive 94/9/EC, the so-called ExNBG, normally meets
annually and is made up of representatives of Notified Bodies with observers from the Commission,
manufacturers and users trade associations, standards making bodies and other invitees. Attendance
at each meeting is by invitation and any party wishing to be considered should contact the Chairman
of the Group either through the Commission or via a Notified Body of your country. The group is
responsible for discussing issues of a technical nature to ensure that the technical provisions of the
Directive and harmonised standards are applied in a uniform way. The group issues "Clarification

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Sheets" where ambiguities exist in technical procedures and also issues technical guidance
documents where less detailed specifications require amplification.

Clarification Sheets and guidance documents are noted by the Standing Committee and published on
the internet
(http://ec.europa.eu/enterprise/sectors/mechanical/documents/guidance/atex/clarification).

9.3 Subcontracting

It has been agreed that Notified Bodies are to keep a register of any subcontracting to allow effective
monitoring by the responsible member state in order to ensure activities are being conducted
properly. The register is to be updated systematically. The register contains information about the
name and location of the subcontractor, the nature and scope of work undertaken, the results of
regular evaluations of the subcontractor, including evidence that details of tasks are monitored as
well as evidence that the subcontractor is competent and maintains competence for the tasks
specified and evidence that a direct private law contract exists.

A Notified Body may engage experts in support of its assessment activities but the experts’ activities
are to be controlled as if the expert were directly employed by the Notified Body under the same
contractual obligations and operate within the Notified Body's own quality system.

The ExNBG has concurred that further (serial) sub-contracting by any sub-contractor is strictly
prohibited.

Although assessment can be sub-contracted including assessment against the requirements of
EHSRs, the Notified Body remains entirely responsible for the whole operation and shall safeguard
impartiality and operational integrity.

Procedures for reviewing and accepting the work of any sub-contractor will ensure that the sub-
contractor has not offered or provided consultancy or advice to the manufacturer, supplier,
authorised representative or their commercial competitor with respect to the design, construction,
marketing or maintenance of the products which are the subject of the sub-contracted task.

9.4 Retention of documentation

Under Article 8.1 (b)(ii) of the ATEX Directive 94/9/EC the manufacturer is required to undertake
the conformity procedure at Annex VIII and then:

"communicate the dossier provided for in Annex VIII, paragraph 3 to a Notified Body which shall
acknowledge receipt of it as soon as possible and shall retain it".

Bodies notified for this procedure should be so according to Article 8.1 (b)(ii) and not to Annex VIII
as this latter procedure does not involve a Notified Body.

This dossier is not returned to the manufacturer on request (but may be added to), and in general it is
retained for a period of ten years following the last placing of the product onto the market. The
intention is that market surveillance authorities in the different member states should be given access
to this dossier, in cases where there is a need to investigate the design or manufacturing details of a
particular product.

With respect to the media used, it is accepted that this dossier may be in electronic format so long as
it is legible and "readable" over the period concerned.

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9.5 Notified Bodies having knowledge of faulty products* on the market

Also a Notified Body which gets knowledge of faulty products, but is neither engaged in the module
for EC-Type examination nor in a module for surveillance of the manufacture, should take some
action.

If there is no immediate danger, if after contact with the responsible Notified Body for EC-Type
examination and with the Notified Body responsible for surveillance of the production of the faulty
product no satisfactory solution after appropriate time is reached, the Notified Body should inform
his own authorities in charge of market surveillance to initiate the adequate measures.

In the case of immediate danger, the Notified Body should inform his own authority in charge of
market surveillance, the Notified Body for EC-Type examination and the Notified Body for
surveillance of the production without delay.

____________________________

* see Note 1 of the Guidelines

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10 DOCUMENTS OF CONFORMITY
10.1 Documents issued by the manufacturer

10.1.1 EC Declaration of Conformity51

Once the manufacturer has undertaken the appropriate procedures to assure conformity with
essential requirements of the Directive it is the responsibility of the manufacturer or his authorised
representative established in the EU to affix the CE marking and to draw up a written EC
Declaration of Conformity.

The manufacturer or his authorised representative established within the EU keeps a copy of this EC
Declaration of Conformity for a period of ten years after the last equipment has been manufactured.

Where neither the manufacturer nor his authorised representative is established within the EU, the
obligation to keep the copy of the EC Declaration of Conformity available is the responsibility of the
person who places the product on the EU market.

In respect of the Notified Bodies possibly involved in the conformity assessment procedure the EC
Declaration of Conformity must contain, where appropriate, the name, identification number and
address of the Notified Body and the number of the EC-Type Examination Certificate. The name and
address of a Notified Body involved in the production phase, where relevant, is not a mandatory
requirement.

As far as assemblies of ATEX equipment are concerned, if an assembly is to be treated as a new
item of ATEX equipment the EC Declaration of Conformity needs only to identify the unit and the
related information. Details of the items of equipment making up the assembly will be included on
the technical file. However, there is a duty on all those in the supply chain to pass on the relevant
information relating to the items of equipment where these have been previously placed on the
market accompanied by their own EC Declaration of Conformity and instructions.

Annex X.B of the Directive states what the EC Declaration of Conformity must contain. Further
information can be found in section 5.4 of the "Blue Guide". As a general rule, the content of the EC
Declaration of Conformity contains the following:

a) Name or identification mark and the Straightforward, noting that the name on the product places
address of the manufacturer or his the named organisation in the position of manufacturer (or
authorised representative in the authorised representative).
European Union
b) A description of the equipment, etc. A descriptive product designation e.g. Motor Control Unit
Type ABC 123 and its intended use.
For an assembly it should list the items in the assembly that
are ATEX equipment in their own right, and which have
been separately assessed.
c) All relevant provisions fulfilled by The marking included on the product e.g. Equipment Group
the equipment, etc. II, Category 2 G (IIB T4).

continued

51
See Annex IV paragraph 1, Annex V. paragraph 2, Annex VI paragraph 1, Annex VII paragraph 1,
Annex VIII paragraph 1, Annex IX paragraph 1 of the Directive.

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continues

d) Where appropriate, the name, Name and number of the Notified Body (or Bodies)
identification number and address of conducting the EC-Type examination.
the Notified Body and the number of
In the case of Category 2 non-electrical equipment, it should
the EC-Type Examination Certificate
refer to the Notified Body holding the copy of the technical
documentation file.
Where relevant, if the body responsible for oversight of the
QA regime is not the same as the one issuing the original
certificate, it should be named separately. However, the name
and address of a Notified Body involved in the production
phase is not a mandatory requirement.
There shall be no reference to a Notified Body certificate
unless it is one coming within the scope of the Directive.
Certificates issued by bodies in their "private" capacity as
certification bodies should be included in the technical
documentation file as part of the evidence of conformity but
should not be quoted on the declaration of conformity.
e) Where appropriate, reference to the The harmonised standards quoted in the technical
harmonized standards documentation file should be listed here.
f) Where appropriate, the standards Other standards and technical specifications quoted in the
and technical specifications used technical documentation file should be listed here
g) Where appropriate, references to If this is a multi-directive declaration, it should already be
other EU Directives which have been clear from the heading which directives the product conforms
applied to.
h) Identification of the signatory who The signatory needs to be a responsible officer of the
has been empowered to enter into manufacturer or of the authorised representative.
commitments on behalf of the
manufacturer, etc.

10.1.2 Written Attestation of Conformity for components

The EC Declaration of Conformity should not be confused with the written Attestation of
Conformity for components mentioned in Article 8(3) of Directive 94/9/EC. In addition to declaring
the conformity of the components with the provisions of the Directive, the written attestation of
conformity has to state the characteristics of the components and how the components are to be
incorporated into equipment or protective systems to ensure that the finished equipment or protective
system meets the applicable Essential Health and Safety Requirements of Directive 94/9/EC.

10.1.3 Documents accompanying the product

According to Articles 4(2) and 5(1) of Directive 94/9/EC and for the purposes of market surveillance
the EC Declaration of Conformity / the written Attestation of Conformity must accompany the
information given with each single product, or each batch of identical products delivered for the
same end user.

The product is also accompanied by instructions for safe use (see EHSR 1.0.6 of Annex II to the
ATEX Directive 94/9/EC). The manufacturer shall provide to the user written instructions that
include the necessary information for repair, maintenance and/or overhaul of the equipment
concerned. The manufacturer does not have to provide the full technical file.

EHSR 1.0.6 does not specify the form of the instructions. It is generally agreed that all health and
safety related instructions must be supplied in paper form, since it cannot be assumed that the user
has access to the means of reading instructions supplied in electronic form or made available on an
Internet site. However, it is often useful for the instructions to be made available in electronic form
and on the Internet as well as in paper form, since this enables the user to download the electronic

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file if he so wishes and to recover the instructions if the paper copy has been lost. This practice also
facilitates the updating of the instructions when this is necessary.
The user takes into account the instructions issued by the manufacturer to carry out repair,
maintenance and/or overhaul on the basis of the requirements of the applicable directives (as
2009/104/EC - Use of work equipment by workers at work and 1999/92/EC - Protection of workers
potentially at risk from explosive atmospheres) and of relevant specific national legislation that
regulates the repair, maintenance and overhaul of used equipment. The instructions must contain
drawings and diagrams necessary for repair of the equipment. Applicable and technically accepted
standards can also be used, for example EN 60079-19 - Explosive atmospheres - Equipment repair,
overhaul and reclamation.

However, where necessary, the manufacturer can include in his documentation a statement that
specific repair, maintenance and/or overhaul of the equipment shall only be conducted by the
manufacturer himself, or by a repairer he has qualified or authorized.

With respect to assemblies, it is important to the safe installation, operation and maintenance of the
assembled unit that all relevant information is passed to the end user. The manufacturer of the
assembled unit should do this by including all related information in a package supplied to the end
user.

10.1.4 Retention of documentation - Quality assurance

According to Annex IV, paragraph 5 of the ATEX Directive 94/9/EC the manufacturer, or where
relevant, the authorised representative or importer) shall, for a period ending at least 10 years after
the last piece of equipment was manufactured, be able to make available to the national authorities:

• the documentation of the quality system;

• updating of the quality system;

• audit reports and certificates of the Notified Body.

Larger organisations have a certified quality management system according to the ISO 9000
standards. For these manufacturers it is recognised that it is difficult to keep all quality documents
and all changes to the quality system for such a long period. It is the opinion of the ATEX Standing
Committee that the requirements in Annex IV, paragraph 5 of the ATEX Directive 94/9/EC are
fulfilled if the manufacturer keeps at the disposal of the national authorities at least the actual quality
management system documents + the following documents which have to be kept for a period
ending at least 10 years after the last piece of equipment was manufactured:

• audit reports and certificates of the ISO 9000 certifier. This will be one or two audit reports per
year that include the actual state at that moment of the quality system with changes;

• audit reports and notifications of the Notified Body that issued the Production Quality Assurance
Notification.

The above consideration is against the background that this documentation shall always be sufficient
so as to enable surveillance authorities to determine that the relevant conformity assessment
procedure(s) was/were applied in a satisfactory manner and that the relevant obligations of the
ATEX Directive 94/9/EC were fulfilled.

10.1.5 Acceptance of test results of manufacturers by a Notified Body
Test reports can be a part of the technical documentation the manufacturer has to present to the
Notified Body and the latter may take them into consideration appropriately.

Concerning safety relevant aspects in connection with Annex III (EC-Type examination) and
Annexes V (Product verification) and IX (Unit verification) to Directive 94/9/EC, a Notified Body's
independent and transparent intervention vis-à-vis the client and all interested parties (e.g. Member
States, European Commission, manufacturers, Notified Bodies) is required legally. Therefore a
Notified Body only may accept test reports of manufacturers under certain conditions. The

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requirements included in the standard EN ISO/IEC 17025 General requirements for the competence
of testing and calibration laboratories (ISO/IEC 17025) shall be used as basis for acceptance of test
results.

The Notified Body has to state the acceptance of test results in his test report.

In any case the Notified Body remains fully responsible for accepted test results and for the EC-Type
Examination Certificate (Annex III) or Certificate of Conformity (Annexes V and IX) based on
them.

10.2 Documents issued by the Notified Body

The Notified Body issues the following documents according to the provisions of the relevant
conformity assessment procedures:

• EC-Type Examination Certificate;

• product and production quality assurance notification;

• conformity to type notification;

• product verification, certificate of conformity;

• unit verification, certificate of conformity.

These documents need not accompany the product.

It is not possible to issue an EC-Type Examination Certificate for products of Category 2
nonelectrical equipment and of Category 3, as mentioned in Article 8(1)(b)(ii) and 8(1)(c). Further, it
is also not permissible to list such goods on an EC-Type Examination Certificate issued for goods of
categories other than these. This is because an EC-Type Examination Certificate is an attestation that
the goods listed on it have undergone the necessary conformity assessment procedures that result in
the issuing of an EC-Type Examination Certificate; it is not necessary for such goods to undergo
such conformity assessment procedures.

Where a single item is covered by more than one category, it may be permissible to issue an EC-
Type Examination Certificate. Under such circumstances, these items need to comply with the
highest applicable conformity assessment requirements (see section 8.1). If this requirement results
in an EC-Type Examination Certificate being issued, these goods are permitted to be listed on an
EC-Type Examination Certificate.

A typical example of this is found in the semiconductor fabrication industry where a high vacuum
pump is used to extract hydrogen but cannot meet the physical clearances necessary to justify
Category 2. Category 3 is adequate for the process as the pump is normally filled with pure hydrogen
at low pressure, so there is no ignition risk except during the very brief transitions between operation
and non-operation.

In this case, it is only the electrical part that is truly subject to EC-Type examination but it is already
established that a mechanical part can be considered along with the electrical part if they are integral
with each other, rather than a mere assembly.

In such cases, it is not unreasonable to mention such items in the same set of documentation i.e. the
goods have an EC-Type Examination Certificate issued for them.

However, where the goods are discrete items e.g. two different type categories of a hand-held radio,
one of which is Category 2 and the other Category 3, a single EC-Type Examination Certificate
should never be issued; the Category 3 goods should be listed on a separate document that in no way
implied it was an EC-Type Examination Certificate. The same should be true for components of
items.

However, the voluntary issue of a certificate for goods that are not permitted to be listed on an EC-
Type Examination Certificate is possible. The certification body may not give an indication on the

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certificate that it is a Notified Body because it would not be acting in that capacity. Therefore, the
number of the Notified Body must not be affixed. Further, it is not permissible to affix the CE
marking to such certificates. There is no objection for the hexagon (Ex mark) to be used or to make
reference to Directive 94/9/EC.

Provision of evaluation and test results with EC-Type Examination Certificates: although being
a separate document, the report describing how the equipment fulfils the Essential Health and Safety
Requirements of the Directive is considered to be integral to the provision of a certificate. Evaluation
and test results supporting the decision to issue an EC-Type Examination Certificate should
accompany the certificate from the Notified Body to the manufacturer.

10.2.1 Minimum content of a European standardised ATEX Test and Assessment Report

The term "test report" is used in a twofold way. In fact certification in scope of 94/9/EC is based on
three levels of reports:

• test in a laboratory, for example the measurement of a temperature, following called test report;

• assessment to the requirements of harmonised standards, following called assessment report;

• assessment to the Essential Health and Safety Requirements of the Directive, following called
assessment report, too.

Having very different types of test reports issued, varying from very poor reports, hardly including
any information, to test reports with detailed test and evaluation results, a standardised ATEX
Assessment Report format enables and ensures the following goals:

1. Recognizable as an ATEX Assessment Report.

2. Specified minimum content.

3. Meeting the requirements for test reports as laid down in EN ISO/IEC 17025 and other applicable
standards.

4. Easy to use/integrate with existing formats currently used by all ATEX Notified Bodies.

5. An ATEX Assessment Report is only issued if all applicable requirements are met and if all tests
have been conducted with positive results (but still allowing waiving tests provided that the
reasoning is given in the test report).

Recognizable as ATEX Assessment Report

The ATEX Assessment Report should be easy to identify as such by manufacturers, Ex
Notified/Certification Bodies and any other party as a genuine ATEX Assessment Report. To realise
this, an identical approach could be followed as for the content and format of ATEX Annex III EC-
Type Examination Certificates; laid down in ExNB Clarification Sheet No. ExNB/09/340. Another
possibility is to just require the use of the wording "ATEX Assessment Report" (exact wording to be
agreed upon) on the cover page of the report; without the need for a standardized template for the
ATEX Assessment Report as has been done for Annex III Certificates.

Specified minimum content

The report shall contain a minimum amount of information that enables manufacturers to easily
obtain other local/regional approvals/certificates based on the information in the report and any
associated test documentation. An assessment report issued by an ATEX Notified Body that supports
the issue of an EC Type Examination shall contain:

• General information about the product, type designation, applicant, manufacturer, types of
protection, technical data.

• Technical evaluation of the construction of the equipment. For most types of protection this
can be a checklist (Yes/No/Not applicable + remarks) combined with the test documentation

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that specifies the construction; for intrinsic safety however a descriptive format is usually the
best (if not the only) useable format. A detailed assessment narrative that confirms compliance
with the standards used to support compliance with the ATEX Directive. If no standards are
used, then the assessment narrative shall confirm compliance with the Directive. Since
explosion safety standards are concept standards occasionally some interpretation is involved:
the report should make clear how the assessment has been carried out.

• Results of tests

o details of tests carried out, relevant information about the test conditions, method and results
shall be provided as part of the test report;

o details of tests that have been waived and the justification for waiving those tests (the
standard EN 60079-0 calls for a justification for waiving tests) shall be part of the
assessment report;

o details of tests that have been accepted from other organisations, test laboratories, etc. and a
justification for accepting those tests shall be part of the assessment report. If tests are being
accepted from other sources, then this should be clear, because the body that produces that
data should be scrutinised. It could easily be disguised that test data from unsuitable sources
had been used.

• Routine tests, if any: applicable to the product and agreed upon between the manufacturer and
the Notified Body (applicable standards are EN 13980 or IEC 80079-34, too).

Requirements for reporting

An ATEX Test Report shall meet all requirements for the content of test reports as

• specified in EN ISO/IEC 17025. In practice, this should not be any problem for a Notified Body
since all conduct and report testing according to EN ISO/IEC 17025;

• an ATEX Assessment Report shall meet all requirements as specified in EN 45011.

Easy to use and integrate by Notified Bodies

It should be easy to integrate the European standardized ATEX Assessment Report in the operational
procedures and documents used by a Notified Body. This requires that the format itself should not be
100% specified in detail, but only to the extent that all parties involved – issuing and receiving
Notified Bodies and manufacturers – know what to find in the test report. So the focus is on the
content of the report, not its layout, numbering, etc. This should make it easy to implement the
ATEX Assessment Report in the existing way of working of all individual Notified Bodies. It should
not cause a significant increase (if any) in the costs for the manufacturer to obtain an ATEX
Certificate.

Full report

To avoid any confusion about the expected content of an ATEX Assessment Report, such report
should only be issued when the product involved meets all applicable requirements and has passed
all applicable tests with positive results. An ATEX Assessment Report shall not be issued in case of
any negative results or in case that only a part of the applicable requirements (for example IP54
requirements) have been evaluated or tested. This does not preclude the issuance of an ATEX
Assessment Report for an Ex component, certified under a "U" certificate.

If a report with negative results or not fully assessed applicable requirements is given to the
manufacturer is must be unambiguous that this is not an ATEX Assessment Report.

10.3 EC-Type Examination Certificate and the responsibilities of stakeholders

A Type Examination Certificate attests that a specimen (including instructions, as appropriate)
representative of the production envisaged by the manufacturer fulfils the relevant applicable
provisions of the Directive, in particular the Essential Health and Safety Requirements (EHSRs).

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The question arises as to the actions that need to be taken when the "generally acknowledged state of
the art" has developed. It is clear that the original specifications applied may continue to show
fulfilment of the EHSRs and the Type Examination Certificate then remains valid.

However, over time the "generally acknowledged state of the art" can develop substantively such
that the specifications originally applied no longer ensure the type examined complies with the
EHSRs. It should be noted that the question of whether there has been substantive development of
the state of the art is not left to discretionary interpretation by the Notified Body, but has equally to
be generally acknowledged by the technical community of the stakeholders. The publication of a
revised harmonised standard would be one way to recognise a development in the state of the art: in
this case, the responsible European Standardisation Organisation (ESO) shall determine whether the
state of the art concerning the EHSRs has changed, and if so, in what respects. The ESO shall
indicate this in the foreword of each standard.

In such cases, if the specifications and evaluation criteria originally applied to a product no longer
ensure that it complies with the latest state of the art, the Type Examination Certificate is no longer
valid and further action is required. Given reasonable transition periods and knowledge of current
developments, it is expected that the manufacturer will have sufficient time to contact a Notified
Body to undertake the necessary re-evaluation so that there is a smooth transition from one set of
applied specifications to another. Notified Bodies, who are expected to maintain a good knowledge
of developments in the state of the art, should make arrangements to alert the holders of their EC-
Type Examination Certificates to the revision of harmonised standards.

It should be noted, however, that the issuing of a new Type Examination Certificate will have no
retroactive effect and, therefore, will not affect products placed on the market and/or put into service
whilst the manufacturer was in possession, where appropriate, of a valid Certificate.

It should also be re-affirmed that the overall responsibility for compliance of the product rests
with the manufacturer who, where required, must ensure that a valid Certificate is in his
possession, as well as that all relevant conformity documents correspond to the current state of the
art. In parallel, the Notified Body must provide all the relevant information for the manufacturer in
order to ensure that the existing Certificate is correct in its evaluation that the type continues to meet
the EHSRs.

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11 MARKING

11.1 CE Marking

As a general rule New Approach directives including Directive 94/9/EC provide for the affixing of
the CE marking as part of the conformity assessment procedures in the perspective of total
harmonisation. The conformity assessment procedures to be applied are described in the relevant
New Approach directives, based on the conformity assessment procedures as defined by Council
Decision 93/465/EEC. Where a product is subject to several directives, which all provide for the
affixing of CE marking, the marking indicates that the product is presumed to conform to the
provisions of all these directives. During the transitional period of a New Approach directive the
manufacturer has the choice to either meet the requirements of this directive or the previous relevant
regulations. The option chosen, and hence the extent of the conformity expression enshrined in the
CE marking, must be indicated by the manufacturer in the accompanying documents.

Any misleading marking in the sense of the any of these directives is forbidden.

As this guide has been especially drafted to facilitate the application of Directive 94/9/EC, the
following explanations refer only to this Directive. If other directives are applicable in parallel, their
provisions have to be taken into account in addition to those of Directive 94/9/EC.

CE marking is used by the manufacturer as a declaration that he considers that the product in
question has been manufactured in conformity with all applicable provisions and requirements of
Directive 94/9/EC and that the product has been the subject of the appropriate conformity
assessment procedures.

The CE marking is mandatory and must be affixed before any equipment or protective system is
placed on the market or put into service. As stated in Article 8 (3) components are excluded from
this provision. Instead of being CE marked, components have to be delivered with a written
attestation stating the conformity with the provisions of the Directive, stating their characteristics
and indicating how they must be incorporated into equipment or protective systems. This separate
statement goes along with the definition of components, which have as structural parts no
autonomous function.

In general the CE marking must be affixed during the production control phase by the manufacturer
or his authorised representative established within the European Union. In certain cases it is possible
to affix the CE marking earlier, e.g. during the production phase of a complex product (e.g. a
vehicle). It is then necessary that the manufacturer formally confirms the compliance of this product
with the requirements of the Directive in the production control phase. The CE marking must consist
of the initials "CE" taking the form described in Annex X to Directive 94/9/EC. In general the CE
marking must be affixed to the product or to its data plate. However, although it is not a requirement
in Directive 94/9/EC, it is considered reasonable to affix the CE marking to the packaging and to the
accompanying documents if it is not possible to affix it to the product because of the product's size
or nature.

It would be sensible, but it is not mandatory, to affix the CE marking to more than one place, for
example, marking the outer packaging as well as the product inside, would mean that the marking
can be ascertained without opening the package.

The CE marking shall be affixed distinctly, visibly, legibly and indelibly. It is prohibited to affix any
marks or inscriptions that are likely to mislead third parties as to the meaning and form of the CE
marking. The requirement for visibility means that the CE marking must be easily accessible for
market surveillance authorities as well as visible for customers and users. For reasons of legibility a
minimum height of 5 mm of the CE marking is required. This minimum dimension may be waived
for small-scale products. The requirement for indelibility means that the marking must not be
removed from the product without leaving traces noticeable under normal circumstances.

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Depending on the conformity assessment procedure applied, a Notified Body may be involved in the
design phase (Annex III), the production phase (Annexes IV, V, VI, VII, IX) or in both phases. The
identification number of the Notified Body only has to accompany the CE marking if the Body is
involved in the production control phase (see Article 10(1) of Directive 94/9/EC). It is necessary to
avoid any misleading information on equipment, for example the number of the Notified Body,
where this is not foreseen by the Directive. Hence, the product should not have the number of a
Notified Body affixed, if falling under Category 3 (other than Unit verification), as well as some
Category 2 equipment, and for any voluntary certification.

The CE marking and the identification number of the Notified Body do not necessarily have to be
affixed within the territory of the EU. These can be affixed in a third country if the product, for
example, is manufactured there and the Notified Body either performed tests on the product type or
assessed the quality assurance system of the manufacturer in that country. The CE marking and the
identification number can also be affixed separately, so long as the CE and body-number remain
combined. In case of components only the identification number of the Notified Body has to be
affixed.

Where equipment that has already been placed on the market is incorporated into a product (e.g. an
assembly according to 3.7.5.1), the integrated equipment must bear the CE marking and, if
appropriate, the identification number of the Notified Body.

Whilst it is recognised that sub assemblies may have CE marking affixed in their own right these
might not be visible following construction of the final product. This is acceptable as this
information can be found elsewhere. However, the final product must have a single label clearly
relating to its final assembly prior to it being placed on the market and/or taken into service. In
affixing the CE marking to the final product the manufacturer or his authorised representative
accepts full responsibility for the conformity of the final product to the applicable Essential Health
and Safety Requirements of Directive 94/9/EC and all other relevant directives.

11.2 Supplementary/Specific Marking

It is the intention of Directive 94/9/EC that the design of the specific marking of explosion
protection follows the design, as specified in Directive 84/47/EEC. Although there is no
requirement in Directive 94/9/EC it is recommended to continue to use the established design (see
Annex I to these Guidelines). This marking has to be followed by the symbol of the group and
category (on devices according to Article 1(2) of Directive 94/9/EC the category should be indicated
in brackets) and, relating to Group II, the letter ‘G’ (concerning explosive atmospheres caused by
gases, vapours or mists) and/or D (concerning explosive atmospheres caused by dust). User
instructions shall explain in detail the meaning of the marking on the product. However it is
recommended to use the format provided in the following examples, where

" .. / .. " means the product has two different categories

".. - .. " means that a part of the product is not conforming to the Directive and not intended to be
used in a potentially explosive atmosphere.

Moreover, devices according to Article 1.2 of the Directive, and separately placed on the market,
shall be marked with the category of the equipment under control in round brackets, and such
devices which contain an own potential ignition source intended for use in a potential explosive
atmosphere shall be marked as equipment according to Annex II clause 1.0.5.

- 62 -

I M2 Mining products, Group I, Category M2

Non-Mining products, Group II, Category 1 for use in gas/vapour/mist
II 1 G
atmospheres

II 1 D Non-Mining products, Group II, Category 1 for use in dust atmospheres

Protective system, for use in gas/vapour/mist/dust atmospheres

Device according to Article 1(2) of Directive 94/9/EC in the non-hazardous area
II (1) G D with intrinsically safe circuits of Category "Ex ia", which can be connected e.g. to
Category 1 equipment

Category 2 equipment for use in potentially explosive atmosphere containing
II 2 GD
gases or dust

An assembly, such as a gas detection system with more than one detection head,
that is partly Category 1 and partly Category 2 formed by a safety device and an
II (2)/2 (1)/1 G
equipment. The safety device is intended for use outside the hazardous area and
the equipment is intended for use inside hazardous area

II 2(1) G Category 2 equipment containing a safety device for a Category 1 equipment

II 2(1) GD Same equipment for gas or dust potentially explosive atmospheres

A safety device alone which ensures the safety against explosion for Category 1
II (2) G (1) G
equipment and for another Category 2 equipment

II 3/3 D A blower exhausting out of Zone 22 and to be installed in Zone 22

Examples for marking of equipment having different categories are:

II 1/2 G Level gauge installed in the tank wall between Zone 0 and Zone 1

II (2) 3 G An electrical field bus device affecting Category 2 equipment installed in Zone 2

A ventilator exhausting out of Zone 1 but to be installed outside potentially
II 2/- G explosive atmospheres. The Directive has no provisions for marking in case of
installation outside potentially explosive atmospheres.

II 2/3 G A ventilator extracting out of Zone 1 but to be installed in Zone 2

A screw conveyor conveying dust out of a Zone 22 but installed outside
II 3/- D potentially explosive atmospheres. The Directive has no provisions for marking
in case of installation outside potentially explosive atmospheres.

II -/2 D Blower conveying no explosive atmosphere but to be installed in Zone 21

All products must be marked with the name and address of the manufacturer, designation of series or
type, serial number (if any) and the year of construction. The product must be accompanied with
written information explaining the different categories and the consequences for the intended use.

Where a product is covered by more than one New Approach directive, CE marking denotes
compliance with the appropriate provisions of all relevant directives. However, where one or more
of these directives are in their transitional period and, as a consequence, allow the manufacturer to

- 63 -

choose which arrangements to apply, the CE marking indicates conformity only to those directives
where application is mandatory and others which are so applied. In the case of these latter directives
particulars must be given in the documents, notices or instructions accompanying the product or,
where appropriate, on the data plate.

11.3 Additional marking for standards

Because of the special importance for the safety of products intended for use in potentially explosive
atmospheres and in order to avoid any misunderstandings Directive 94/9/EC provides for additional
markings (see Annex II 1.0.5. Marking).

It is stated in Annex II 1.0.5 to the Directive that equipment, protective systems and components
must furthermore be marked with all necessary information essential to the safe use. According to
this requirement European standards for electrical and non-electrical products for potentially
explosive atmospheres foresee a supplementary marking. For detailed and complete information
about this marking it is necessary to use these standards.

11.4 Marking of components

The person responsible for the placing on the market and/or the putting into service of a product has
to mark it with the name and the address of the manufacturer, according to Annex II to Directive
94/9/EC, clause 1.0.5. The Directive leaves it free to choose between trademark and company name
if there is a difference. The address must be shown on the marking. This address can be simplified if
there is not really enough room on small products, as long as the responsible person can always be
identified. In any event, the address on the plaque must be sufficient for mail to reach the company.
An internet address is not sufficient but the postal address has to be given. In some countries a
unique postal code identifies an address. The use of this postal code is sufficient with the country.

The question has arisen, whether the marking of components is mandatory.

Strictly speaking, Directive 94/9/EC explicitly requires marking in Annex II, clause 1.0.5., only for
equipment and protective systems. The question, whether components should nevertheless be
marked in order to facilitate the implementation to the Directive, has particular practical relevance in
cases

• where it is difficult to recognise the difference between ATEX components and standard
components, and

• where a manufacturer who wanted to use a component might have serious problems undertaking
his risk assessment, if there is no indication about the category of the component.

Apart from the question of marking, the Directive requires an attestation of conformity for
components. The latter shall give all the necessary information stating the characteristics. This
normally occurs assigning to the component an explosion classification according to relevant
harmonised standards, which looks like a marking (e.g. Ex II 1/2 GD cb Tx or Ex II 1 GD c Tx).

For components having an own potential ignition source or which are clearly correlated (with
respect to the properties of the component) to equipment with a given category, it has been
considered that without the definition of group and category, the necessary conformity procedure of
the equipment, which the component will be incorporated to, cannot be performed.

In some cases the conformity procedure can only be performed, if the equipment, which the
component will be incorporated to, is defined, and if this incorporation is a matter of the conformity
procedure.

Therefore, it is recommended to mark components, as long as these can be assessed with respect to a
certain category and group of equipment, indicating this category and group in the marking.

Moreover, it is recommended to mark components for autonomous protective systems, which can be
assessed with respect to the characteristic properties of the latter, as far as reasonable indicating
these characteristics in the marking.

- 64 -

It has also to be considered that size is a problem impeding marking on a product. In these cases, the
information should be given in the accompanying documentation and on the packaging of the
component subject to marking.

Finally, it is recalled that, according to Directive 94/9/EC, ATEX components shall not bear the
CE-marking.

11.5 Marking of small products

In accordance with the guidance given to the CE marking of products, it is also considered
reasonable to affix all other marking to the packaging and the accompanying documents if it is not
possible to affix it to the product because of the product's size or nature.

On very small products where a reduction in the marking is unavoidable, the following information
is nevertheless required:

• CE marking (not for components),

• Ex marking,

the name or registered trade mark of the manufacturer.

11.6 Marking of assemblies

The marking of assemblies is identical to the marking of equipment, in particular equipment having
different categories. An assembly may consist of a large number of assessed and compliant items
(equipment, protective systems, safety devices) with their own specific marking, potentially of
different categories. In such cases it would not be helpful to show all of these the individual
markings in the marking of the complete assembly. Nevertheless, the marking of the assembly has to
display all relevant information required by Annex II, 1.0.5, of Directive 94/9/EC necessary for the
intended use of the assembly as a whole. The marking shall be placed in such a way – e.g. on the
outer housing of the assembly – so that there is no doubt that it shows the characteristics of the
whole assembly and not just one part.

Assemblies may consist of parts of different categories and be intended for potentially explosive
atmospheres having different physical characteristics. The marking of the assembly as a whole with
group, categories and additional information essential for the safe use of the assembly (temperature
class, etc.) may fall under one of the two following scenarios:

Case 1: The assembly as a whole is intended for use in one potentially explosive atmosphere of
one specific zone

Where the individual parts of the assembly are marked for potentially explosive atmospheres having
different characteristics, the part with the lowest level of safety defines the marking of the whole
assembly. That means that the category, temperature class, explosion group etc with the lowest
requirement for the equipment has to be used for the marking of the whole assembly.

Case 2: Parts of the assembly are intended for use in potentially explosive atmospheres having
different physical characteristics and/or different zones

If it is essential for that intended use, the marking of the assembly shall contain all groups, categories
and additional markings (temperature class, etc.) necessary for the intended atmospheres. In this
case, the instructions for use, installation etc. will indicate the different atmospheres/zones intended
(and/or provided by constructional measures) in or around different parts of the equipment.

Examples (only categories and additional markings essential for safe use are given in these
examples):

Examples for case 1:

- 65 -

• An assembly consisting of parts marked with T3 and other parts with T6 shall be marked T3 to
indicate, that it is, as a whole, intended for use in T3 atmospheres.

• A pump unit consisting of a liquid pump (non flammable liquid) and driving electric motor. The
pump is marked II 2 G T6, the motor II 2 G IIB T4. The whole assembly shall be marked
II 2 G IIB T4, as the motor is the part that meets the lower requirements.

• A similar pump unit with a pump conveying hot liquid (non flammable). The pump is marked
II 2 G T3, the motor II 2G IIB T4. In this case the assembly shall be marked II 2 G IIB T3.

Examples for case 2:

• A fan conveying a IIA T3 explosive atmosphere (Zone 1), the fan fitted with an electric motor
and some control devices placed in a Zone 2, the fan accordingly marked II 2/3 G IIA T3. The
motor is marked II 3 G T3, the intrinsic safe control device II 2 G IIC T6. As the intrinsic safe
control device is placed in the same atmosphere as the motor, the part meeting the lower
requirements (in this case the motor) is the decisive item. Accordingly the marking of the whole
assembly is II 2/3 G IIA T3.

• A similar fan assembly, but with the motor placed outside the hazardous area. The marking of the
whole assembly is II 2/3/- G IIA T3.

- 66 -

12 SAFEGUARD CLAUSE52 AND PROCEDURE
The safeguard clause referred to in Article 7 of the Directive is the EU procedure whereby any
measure taken by a Member State, on the grounds of non-compliance with the Essential Health and
Safety Requirements and where it is deemed that equipment is liable to endanger persons,
animals or property for the purpose of withdrawing from the market, prohibiting the placing on the
market or restricting the free movement of equipment accompanied by one of the means of
attestation provided for in the Directive and therefore bearing the CE marking, must be immediately
notified to the Commission by the Member State which has taken it.

In considering whether the safeguard clause should be triggered, Member States and the respective
enforcement authorities will need to consider whether the non-compliance is substantial or can be
considered a non-substantial non-compliance to be resolved without recourse to the procedures
enabled via the safeguard mechanism.

For example, a non-substantial non-compliance could consist of illegibility of the CE marking. In
such cases, the Member State could issue a compliance notice to the manufacturer or authorised
representative or take other actions allowed by national legislation to encourage the responsible
person(s) to take appropriate corrective action.

Member States will need to consider in each case whether the non-compliance is liable to endanger
persons, animals or property and if the safeguard clause is the most effective means of ensuring the
safety of persons, animals or property, which remains paramount under this section of the Directive.

Any notification, which fulfils the criteria of invoking the safeguard clause, is followed by a process
of consultation between the Commission and the "parties concerned". The "parties concerned"
primarily means all Member States of the EU, the manufacturer or his authorised representative
established within the EU or, failing them, the person who placed the product on the EU market.

The consultation procedure enables the Commission, on the basis of the above reasons, to assess
whether the restrictive measure is justified. This means that the measures notified to the Commission
must be accompanied by detailed information specifying in particular the reasons why the Essential
Health and Safety Requirements laid down in the Directive have not been complied with by the
product concerned.

Where the Commission finds, following such consultation, that the measures are justified, it
immediately informs the Member State which took the initiative and the other Member States. In the
Commission's view, the objective of informing the other Member States is to prompt these Member
States to take appropriate measures in accordance with Article 3 of the Directive.

Where the Commission finds that the measures, adopted by the Member State are not justified, it
will ask that Member State to withdraw its measures and immediately to take the appropriate action
to re-establish the free movement of the products in question on its territory. If a Member State
refuses to follow the Commission's position the Commission reserves the right to proceed under
Article 226 of the EC Treaty.53

In order to ensure transparency and the proper uniform application of the safeguard clause, Article
7.4 states that "the Commission shall ensure that the Member States are kept informed of the
progress and outcome of this procedure".

In addition to this provision the Directive foresees in Article 6 (1) a specific Standards Safeguard
Clause. Where a Member State or the Commission considers that a harmonised standard does not

52
For a detailed analysis of the "Safeguard clause", see the "Guide to implementation of the Community
harmonisation Directives based on the New Approach and the Global Approach", sheet I/E, Chapters 2,
3, 4.
53
Article 226 of the EC Treaty: if the Commission considers that a Member State has failed to fulfil an
obligation under this Treaty, it shall deliver a reasoned opinion on the matter after giving the State
concerned the opportunity to submit its observations. If the State concerned does not comply with the
opinion within the period laid down by the Commission, the latter may bring the matter before the Court
of Justice.

- 67 -

fully meet the Essential Health and Safety Requirements of the Directive they shall bring the matter
before a special Committee set up under Directive 98/34/EC54. The Committee shall examine the
case and deliver an opinion to the Commission. In the light of this opinion the Commission shall
inform Member States whether or not it is necessary to withdraw the references to those standards
from the published information.

54
Directive 98/34/EC of the European Parliament and the Council laying down a procedure for the
provision of information in the field of technical standards and regulations; OJ L 204, 21.7.1998, p. 37,
as amended by Directive 98/48/EC.

- 68 -

13 EUROPEAN HARMONISED STANDARDS55
Directive 94/9/EC provides manufacturers with the option of complying with its requirements by
designing and manufacturing directly in accordance with the Essential Health and Safety
Requirements, or to harmonised standards which are developed specifically to allow a presumption
of conformity with those requirements. In other words, in the case of a challenge, the responsible
national authorities will have to prove that the equipment is not in conformity with the Essential
Health and Safety Requirements of the Directive.

The presumption of conformity is conferred, in regulatory terms, only by the use of the national
standards transposing a harmonised standard the reference of which is published in the OJEU.
Where the relevant national standardisation body has not transposed the standard, use of the original
harmonised standard or of a transposed standard in another Member of the EU confers the same
presumption of conformity. However, such transposition must have taken place into the national
standards collection of at least one of the Member States of the European Union.

Industry and many Notified Bodies are involved in the development of these standards and it is
likely that these standards will be the preferred option for demonstrating compliance once they
become available.

Voluntary harmonised standards are the only documents the application of which provides for
presumption of conformity. Manufacturers may also decide to use existing European, national and
other technical standards and specifications regarded as important or relevant to cover the relevant
essential health and safety requirements, together with additional controls addressing those other
requirements not already covered.

Standards are amended and updated in response to new technical knowledge. During the process of
updating, a manufacturer may continue to use a current harmonised standard to claim full
compliance with the Directive, even though it is clear that the standard will change in time.

13.1 European Harmonised Standards published in the Official Journal

By way of information, a reference list of European Harmonised Standards can be found on the
European Commission's website56.

European standards for ATEX are available from the European Standardisation Organisations:

- European Committee for Standardization (CEN): avenue Marnix 17, 1000 Brussels,
Belgium; tel. (32-2) 550 08 11; fax (32-2) 550 08 19 (http://www.cen.eu)

- European Committee for Electrotechnical Standardization (CENELEC): avenue Marnix 17,
1000 Brussels, Belgium; tel. (32-2) 519 68 71; fax (32-2) 519 69 19
(http://www.cenelec.eu).

National transpositions of Harmonised Standards are available from the national standardisation
bodies.

13.2 Standardisation Programme

Two standardisation programmes addressed to the European standardisation bodies. Each one is the
subject of a standardisation mandate drawn up by the European Commission.

55
See also http://ec.europa.eu/enterprise/policies/single-market-goods/documents/blue-guide ("Blue
Guide").
56
http://ec.europa.eu/enterprise/policies/european-standards/harmonised-standards/index_en.htm.

- 69 -

The European Commission has granted a mandate to CEN/CENELEC to produce European
standards. The mandate covers the standardisation work necessary for the optimum functioning of
the Directive in both the electrical and mechanical field.

The mandate requires intensive co-operation between CEN and CENELEC to carry out the
following work:

1. to review and, where appropriate, modify existing standards with a view to aligning
them with the Essential Health and Safety Requirements of the Directive;

2. to establish the new standards required, giving priority to horizontal standards, which
apply to broad ranges of products, rather than to specific products, with the need for
them to be demonstrated on a case-by-case basis.

To carry out their mandate CEN established a technical committee CEN/TC 305 "Potentially
explosive atmospheres - Explosion prevention and protection". Several working groups carry out the
detailed work.

To carry out their mandate CENELEC allocated the work to TC 31 "Electrical apparatus for
potentially explosive atmospheres", and its sub-committees. These Committees have been working
in the potentially explosive atmosphere field for a considerable number of years and have produced a
series of Standards under the Old Approach directive.

CEN and CENELEC are responsible for the preparation of standards of the electrical and non-
electrical sectors of industry respectively. They have the responsibility to ensure that:

there is uniform interpretation of the New Approach directive for potentially explosive
atmospheres, and other relevant directives;

safety requirements for the electrical and non-electrical sectors are compatible where
they overlap, and the levels of safety sought are equivalent;

The preparation of standards in the future by one of the organisations satisfactorily
reflects the needs of the other, and vice versa.

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14 USEFUL WEBSITES
European Commission's website on EUROPA on Equipment and protective systems for Potentially
Explosive Atmospheres - ATEX:
http://ec.europa.eu/enterprise/sectors/mechanical/atex

Directive 94/9/EC:
http://ec.europa.eu/enterprise/sectors/mechanical/documents/legislation/atex/index_en.htm

ATEX - Management of the Directive:
http://ec.europa.eu/enterprise/sectors/mechanical/atex/directive-management/index_en.htm

Guidance documents:
http://ec.europa.eu/enterprise/sectors/mechanical/documents/guidance/atex/index_en.htm

Considerations papers by the ATEX Standing Committee:
http://ec.europa.eu/enterprise/sectors/mechanical/documents/guidance/atex/standing-committee

Transposition into national law:
http://ec.europa.eu/enterprise/sectors/mechanical/documents/legislation/atex/transposition/index_en.
htm

ATEX competent authorities for Market Surveillance:
http://ec.europa.eu/enterprise/sectors/mechanical/files/atex/atex-ca_en.pdf

ATEX contact points in Member States, candidate and EEA countries:
http://ec.europa.eu/enterprise/sectors/mechanical/files/atex/atex-cp_en.pdf

Notified Bodies:
http://ec.europa.eu/enterprise/sectors/mechanical/documents/legislation/atex/notified-
bodies/index_en.htm

CE Marking for professionals - Equipment and protective systems intended for use in potentially
explosive atmospheres:
http://ec.europa.eu/enterprise/policies/single-market-
goods/cemarking/professionals/manufacturers/directives/index_en.htm?filter=6

European standards - Equipment for explosive atmospheres (ATEX):
http://ec.europa.eu/enterprise/policies/european-standards/harmonised-standards/equipment-
explosive-atmosphere/index_en.htm

CEN Technical Committee 305 Potentially explosive atmospheres - Explosion prevention and
protection:
http://www.cen.eu/cen/Sectors/TechnicalCommitteesWorkshops/CENTechnicalCommittees/Pages/d
efault.aspx?param=6286&title=CEN/TC+305

CENELEC Technical Committee 31 Electrical apparatus for potentially explosive atmospheres:
http://www.cenelec.eu/dyn/www/f?p=104:7:2623002190173595::::FSP_ORG_ID:66

Industry associations and international organisations:
http://ec.europa.eu/enterprise/sectors/mechanical/links

ATEX Directive interest group on CIRCABC:
https://circabc.europa.eu/w/browse/0cb52e92-2074-480c-8235-a4cac539d591

ATEX Administrative Co-operation (AdCo) interest group on CIRCABC:
https://circabc.europa.eu/w/browse/95700477-ba5c-4b52-9552-2375dc1a808d

ATEX group of Notified Bodies (ExNBG) interest group on CIRCABC:
https://circabc.europa.eu/w/browse/33b0bed8-1c65-4d9e-b857-1f34d2d91c04

- 71 -

ANNEX I: SPECIFIC MARKING OF EXPLOSION
PROTECTION (εx) DRAWN FROM DIRECTIVE 84/47/EEC57

All values related to ‘a’

57
Commission Directive 84/47/EEC of 16 January 1984 adapting to technical progress Council Directive
79/196/EEC on the approximation of the laws of the Member States concerning electrical equipment for
use in potentially explosive atmospheres employing certain types of protection (OJ L 31, 2.2.1984, p.
19).

- 73 -

ANNEX II: BORDERLINE LIST - ATEX PRODUCTS

BORDERLINE LIST - ATEX PRODUCTS
The List has been confirmed during the Directive 94/9/EC ATEX Working Group meeting on 12 July 2012

Note that the list is not complete, it only clarifies some common inquires and provide examples of
products within or outside the scope of the ATEX Directive 94/9/EC. The List does not replace the vital
risk assessment of each product and in addition ignition sources and explosion hazards related to the use
of all the products shall also always be considered.

Scope of
Examples of
Products 94/9/EC Comments
products
(El. = Electrical)

Equipment
Automatic lubrication systems Yes (El.) Yes: if it is a battery supplied system and has one or more
electrical battery cells above the values specified in Simple
Apparatus clause of EN 60079-11 and if the other criteria for
simple apparatus are not met.
Clockworks - See 5.2.1 in ATEX Guidelines ("Simple" products).
Computers Yes (El.)
Simple earthing clamps with and without No "Simple Earth Clamps" are clamps with a single earth
cord connection. The clamp shall provide evidence that it is actually
making contact. No own source of ignition, and for additional
considerations, See note 2.
Complex earthing clamps with and Yes (El.) The clamp shall provide evidence that it is actually making
without cord contact. Potential ignition sources cannot be excluded according
to the ignition hazard assessment.
Electrical motors Yes (El.) El. equipment with potential ignition sources like heat and
sparks of electrical origin (e.g. windings, connections) and
mechanical origin (e.g. bearings).
Electrical pump with integrated electrical Yes (El.) El. equipment with potential ignition sources like heat and
motor (e.g. canned or split tube motor sparks of electrical origin (e.g. motor circuit) and mechanical
pump, petrol pump/dispensers for petrol origin (e.g. pump impeller).
filling) Static discharge may occur while pumping/filling in progress.
Electrical fan with integrated electrical Yes (El.) El. equipment with potential ignition sources like heat and
motor (e.g. electrical axial fan) sparks of electrical origin (e.g. motor circuit) and mechanical
origin (e.g. fan blades).
Non-electrical fan with integrated air Yes (Non El.) Non-el. equipment with potential ignition sources like frictional
motor (e.g. non-electrical axial fan) heat and sparks of mechanical origin (e.g. bearings, fan
blades).
Hand operated valves No See 5.2.1 in ATEX-Guidelines ("Simple" products).
Heating cables Yes (El.) Heating cables transform electricity into heat while cables
"only" transports electricity. Heating cables may also be
components, e.g. heating cables for controlled design
applications as part of trace heating systems.
Mechanical brakes Yes (Non El.) Non-el. equipment with potential ignition sources like frictional
heat of mechanical origin.
Mechanical gears Yes (Non El.) Non-el. equipment with potential ignition sources like frictional
heat and sparks of mechanical origin.
Phones and similar equipment e.g. Yes (El.) El. equipment with potential ignition sources like heat and
walkie-talkies, head phones etc. sparks of electrical origin.
Plugs and socket outlets Yes (El.) El. equipment with potential ignition sources like sparks of
electrical origin (e.g. when connected or disconnected).
Note that all countries have special requirements on plugs and
socket outlets for domestic use.
Rotary valve Yes (Non El.) Only intended to be used as dosing equipment and NOT to stop
the propagation of an explosion as explosion isolation system.
Has to be explosion protected with respects to its ignition
sources.

- 74 -

Scope of
Examples of
products
(El. = Electrical)

Switches for fixed electrical installations Yes (El.) El. equipment with potential ignition sources like sparks of
electrical origin (e.g. when switched on or off).

Torch Yes (El.) El. equipment with potential ignition sources like heat and
sparks of electrical origin (e.g. sparks from a switch or heat in a
bulb or battery).
Protective Systems
Fire extinguisher No Intended to be used after an explosion.

Flame arrestors Yes Intended to be used to stop the propagation of an explosion.
Flame arrestors are used for example on vapour recovery lines
on petrol stations to prevent the propagation of an explosion to
the underground storage tank or the vehicle.
PT 100 sensor No / Yes No when used in an intrinsic safe system together with e.g. a
barrier.
In all other situations is it to be decided on a case by case
assessment.

Rotary valve Yes Intended to be used not only as dosing equipment but also as
explosion isolation system to stop the propagation of an
explosion. Has to be explosion protected with respects to its
ignition sources and shall fulfil the requirements for protective
systems with respect to propagation of an explosion.
Vent panels (for explosion pressure Yes Intended to be used to limit the effects of an explosion.
relief)
Ex Components
Empty enclosures Yes (El.) Intended to be used for electrical equipment with potential
ignition sources.
Sight glasses No No own source of ignition.
However, sight glasses may form part of the enclosure of Ex
equipment and be required to fulfil relevant requirements such
as for a window in Ex d equipment or impact resistance in Ex o
and Ex 'k' equipment.
Spark arrestor Yes Intended to prevent an explosion; not to limit it. It is an ATEX
component if intended to be built into ATEX equipment or
protective systems.
Magnetic catches for doors etc. No No autonomous function; not essential to safe functioning of
ATEX equipment or protective system.

Safety, Controlling or Regulating
devices
Devices controlling the regular safety No Shall be protected as potential ignition sources themselves if
limits of an industrial process handling placed inside hazards areas, but safety devices with respect to
flammables, like pressure, level and risks other than ignition hazards + monitoring devices providing
temperature transmitters only an alarm signal, but without direct control function, are
outside scope of the directive (with respect to reliability and
functional requirements according to the ESHR, clauses 1.5.
and 1.6.).
Overload or temperature protective Yes (El.) Both categories of devices are within 94/9/EC article 1.2., with
devices, inhibiting ignition sources from respect to functional and reliability requirements according to
becoming active (e.g. current-dependent the ESHR, clauses 1.5. and 1.6.
device for Exe motor)
+ Initiator devices for explosion
protective equipment systems, i.e.
suppression systems (trigging)
Other products
Cables No No autonomous function; not essential to safe functioning of

- 75 -

Scope of
Examples of
products
(El. = Electrical)

Cable ladder and chain/handler systems No No autonomous function; not essential to safe functioning of
ATEX equipment or protective system. No own source of
ignition, and for additional considerations, see Note 2.
Conduits/pipes: e.g. Fume extraction No No autonomous function; not essential to safe functioning of
arms and conduits for electrical ATEX equipment or protective system.
installations
(Except for conduits intended to be used
between the flameproof enclosures and
the conduit sealing devices)
Cable lugs/shoes with and without cord No No autonomous function; not essential to safe functioning of

Electro Static Discharge (ESD) - No No autonomous function; not essential to safe functioning of
Protections: E.g. wrestles, shoes, ATEX equipment or protective system.
standing mats, antistatic bags
Doors No No: none automatic doors are considered as a part of the fixed
walls and are not operated in the presence of explosive
atmospheres. For additional considerations, see Note 2.
Ladders, irrespective of the material No No own source of ignition.
Paint No No own source of ignition.
Tank No No own source of ignition.
Tools: e.g. hammers, tongs No No own source of ignition.

Note 1: Additional information can be obtained in the ATEX Guidelines and Standing Committee Considerations to Directive 94/9/EC but
also in the Non-binding Guide to Directive 1999/92/EC.

Note 2: Equipment, protective systems, Ex components, safety, controlling, regulating devices and/or other products indicated as not
falling within the scope of ATEX 94/9/EC, ignition sources and explosion hazards related to the use shall be considered. Friction impacts
and abrasion processes involving rust and light metals (e.g. aluminium and magnesium) and their alloys may initiate an aluminothermic
(thermite) reaction, which can give rise to particularly incendive sparking.

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