C.s specs

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DOCUMENT NO. : WMEP/MITPS/6000
MANUFACTURING INSPECTION TESTING MITPS NO. : MITPS/DONG HO/001 (Rev. 0)
PROCEDURE SPECIFICATION PAGE NO : 1 OF 17
WELSPUN MIDDLE EAST PIPES LLC
PLANT : SPM-1/SPM-2/SPM-3

CLIENT : M/s DONG HO Korean Saudi Limited Company

PROJECT : RIYADH STRATEGIC WATER SUPPLY SCHEME
PIPE GRADE : API – 5L, Grade X52M PSL2
OFFER REFERANCE / P.O NUMBER : General MITPS
PROJECT SPECIFICATION : Specification M01 ( steel pipe for main lines ) QC10-H-041 Rev- 02, [M01] Dated 05.08.2010

ITEM CLASS PIPE SPECIFIEDOUTSIDE WALL THICKNESS Grade QTY.
NO. DIAMETER

INCH(MM) INCH MM METERS

1 1 72” ( 1828.8 ) 0.375” 9.53 X52M As per PO
PIPE SIZE
2 1 56” (1422.4) 0.375” 9.53 X52M As per PO

3 1 64”(1625.6) 0.375” 9.53 X52M

4 1 96” ( 2438.4 ) 0.5” 12.70 X52M As per PO

Note: 96” Pipe shall not be provided with API Monogram

Helical Seam Submerged Arc Welded (SAWH) Line Pipes As Per
PIPE MANUFACTURING SPECIFICATION :
Customer Specification(M01) QC 10-H-041 Rev 2, Dated 05.08.2010 & API 5L 44th Edition and Addendum 3 effective from Jan 2012

Revision Record
Revision Description Date Prepared By Checked Approved
0 Issued for Approval 07-03-2012 Waleed.M.Abdellah C.Veerapandian K.Seshagiri Rao Client

Sr. Ref. Standard / Inspection Stage
Work Description Testing Frequency Acceptance Criteria Documents
No. Specification WMEP TPI

Client Specification M01 Carbon steel SAW spiral seam, class 1, Non sour pipes as per
(A) Scope -------- -------- -------- --------
clause 1 & API 5L clause 1 API 5L & Customer Specification M01

Client Specification M01
API 5L Grade X52M PSL-2 coils as per clause no. 8.3 of
1.0 Steel (Coils) Clause 4.1 & API 5L 100% coils Coil Mill TC R R
API 5L.
clause 8.3

Coil Procurement &
1.1 API 5L clause 8.3.4 Each coil As per RMTDS & API 5L clause 8.3.4 Mill report H M
Inspection

Each longitudinal edge max 10.0 mm each side & root
1.2 Edge milling Std. Procedure / WPS Each coil Insp. report H M
and bevel as per approved WPS

As per mill procedure, forming angle shall be confirmed
1.3 Pipe forming API 5L Table 2 Each pipe Mill report H M
at the time of PQT.

Client Spec.M01 clause As per approved welding procedures
Welding including skelp 4.2.3 & 4.2.5 & API 5L
2.0 Each coil A separate welding procedure shall be qualified for skelp Prod. Report H M
end joints clause 8.10.2 & 8.10.4 &
ASME SEC. IX end welds.

ASME SEC IX & API ASME SEC. IX / API 5L Annex – C & D. Weld
3.0 WPS/PQR/WPQ Each wall thickness WPS/PQR/ WPQ H W/R
5L. procedure for SAW & repair weld as per approved WPS.

Automatic submerged arc ASME section IX & API Current, voltage, speed, wire & flux. Shall be controlled
3.1 Each pipe Welding report H M
welding 5L clause 8.6 & 8.10 & monitored as per approved PQR

Continuous tack welding ASME section IX & API
3.2 Each pipe As per approved WPS & as per clause no 8.4 of API 5L. Welding report H M
(if done) 5L clause 8.4


Client Spec.M01 clause
Visual inspection All pipes shall be visually examined both externally and
5.2 & (Clause 10.2.7 &
3.3 Each pipe internally and shall be free of defects. Acceptance as per Pre- visual report H RW
(Preliminary) 9.10.7of API 5L.)
API 5L

Fluoroscopy (Internal) As per API 5L. Clause. E.4.5, clause. E.4.6 & as per
4.0 Clause E.4 of API 5L. Each Pipe ----- H -----
approved WI for X-Ray

Pipe shall be tested at following test pressures & the
holding time shall be 10 seconds

Item Sr. Pipe OD WT (mm) Grade Pressure (min)
No. (Inch)
BAR

1 72” 9.53 X52M 36
(1828.8 )
Graph chart
5.0 Hydrostatic test As per client showing pressure
specification M01 clause Each pipe 2 56” X52M 46 & holding time H RW
9.53
(95% OF SMYS) 5.3.2 A(2) (1422.4) for each pipe and
3 64” X52M 40
test report
9.53
(1625.6)
4 96” 12.70 X52M 36
( 2438.4 )

Calibration of the pressure gauges shall be carried out at
start of production further to a frequency of at least once
per week.

Non destructive Testing


Clause E.3.2.2 of API 5L &
As per client specification
M01 Clause 5.3.2 A.3 & As per API 5L clause. E.4.5, clause. E.4.6 & as per WI for X- X-Ray report &
6.0 X-Ray Inspection 5.3.2 A.5 Each Pipe Ends H R
Ray radiographs

Clause E.3.2.2 of API 5L &
Each pipe both ends up to 250 Both ends of pipe up to a distance of 250 mm, acceptance as per X-Ray report &
6.1 As per client specification Each Pipe ends H R
mm clause no. E 4.5 & E 4.6 of API 5L. radiographs
M01 Clause 5.3.2 A.4.

All restart spots shall be x-ray checked, acceptance as per clause X-Ray report &
6.2 RSO / RSI ----- If any H R
no. E 4.5 & E 4.6 of API 5L radiographs

Clause E.3.1.1 of API 5L,
Table E1 & As per client All T-Joints of skelp end welds with extent of 150 mm in each X-Ray report &
6.3 T-joints of skelp ends If any H R
specification M01 clause direction of “T” Joint shall be inspected by X-ray radiographs
5.3.2 A.5

Twice per operating
UT calibration standard shift, with second
7.0 Clause E.5.3.2 of API 5L. As per clause no. E.5.2 & E.5.3 of API 5L. Cal. Report / graph H RW
calibration at interval of
4 hrs.

Clause E.3.1 Table E1 & 100% weld seam of All indications producing signals higher than the acceptance
Weld Seam Ultrasonic Testing 3.2.3 of API 5L limits of reference standard & API 5L shall be MUT checked.
8.1 each pipe (except UT report H RW
(AUTO UT) Lack of Penetration Not Accepted >100 mm in weld.
untested length)
Acceptance as per API 5L & WI for Auto UT.


Body Ultrasonic Testing As per client Each Pipe and For Body: <16400 mm² per 1000 mm of strip/plate length
(AUTO UT) specification M01 clause Plate/strip edge over or average of 8200 mm² per meter in total length with
4.1.1 & ISO 12094 a minimum width of max. individual size of 1800 mm² Body UT report
50 mm
& Min. width of 12 mm. For edge: 10 mm < Length < (or)
20mm, area = 250 mm² & Max. population density of 3 [
(or) 10 mm < Length < 20mm] per 1meter length of edge
8.2 H RW
Complete circumference of the pipe ends over band of at
least 50 mm width shall be ultrasonically tested for
lamination .
As per client Coil UT report
Coil UT specification M0 1 Each Pipe For Body: Acceptance Level B1 of ISO 12094
Clause 4.1.1 For edge: Acceptance Level Annex 3.2.3 of API 5L

Clause E.3.2.1 of API 5L
Manual ultrasonic testing & As per client As per client specification M01 & API 5L Acceptance as
8.3 Each Pipe MUT report H RW
for weld & body specification M01 clause per API 5L & WI for MUT
5.3.2 A.3

a) Each pipe End untested RW
weld length from Auto UT API 5L clause E.3.2.1 Each Pipe Acceptance as per API 5 L & WI for MUT. MUT report H
& Auto UT indications

MUT of 25 mm from the As per client
In accordance with Annex E.3.2.3 & Approved WI for
b) beveled ends of pipe specification M01 clause Each Pipe ends UT report H RW
MUT.
circumference A.3

The complete strip end weld shall be subjected to manual
Clause E.3.1.1 of API ultrasonic testing.
c) Skelp Joint Skelp weld 100% MUT report H RW
5L Table E1
Acceptance as per API 5L.


Clause E. 3.2.2 of API All indication from MUT shall be confirmed by X-ray,
9.0 Indication from MUT If any X-Ray report H R
5L. acceptance as per clause no. E 4.5 & E 4.6 of API 5L.

Clause C.4.6 of API 5L
& As per client All weld repaired areas shall be inspected by UT and X-
9.1 Weld Repair areas If any X-Ray report H R
specification M01 clause ray
5.4.2

Residual Magnetism Each end of pipe
Clause E.7 & E.7.6 of The average of the four reading shall not exceed 30 gauss
10.0 selected once per 4 Test Report H RW
(if MPI is carried out) API 5L. and no one reading shall not exceed 35 gauss
hours

Workmanship, Visual
11.0 Inspection and Repair of
Defects

Clause 10.2.7 of API 5L
& As per client Visual &
Each pipe inside &
11.1 Visual Inspection specification M01 Clause Pipe shall be visually inspected from ID and OD dimensional H RW
outside
no.5.3.3 (Visual Report
Inspection )

As per client Dents shall not exceed 6mm, nor shall they extent in any
Visual &
specification M01 Clause direction over a distance longer than ¼ of pipe Diameter.
11.2 Dents If any dimensional H RW
no. 5.3.3. Visual Dent containing creases, sharp edged imperfections or
Report
Inspection Point 5 gouges shall be considered as Defects.

As per client
Visual &
specification M01 Clause Each pipe & maintain 10% of the specified Wall Thickness but up to Max.
11.3 Radial Offset of edges dimensional H RW
5.3.3 Visual Inspection record 3 pipe /shift 1.6mm
Report
Point 3


As per client
specification M01 Clause One per heat/50 pipes H
Misalignment of weld Distance between centre line of internal & external weld
11.4 5.3.3 Visual Inspection Macro Reports RW
beads in weld macro section.
Point 2 & Table 14 Of
API 5L

Clause 9.10.2 of API 5L
11.5 & As per client
Height of weld bead Each pipe & record Visual &
specification M01 Clause Maximum 3.0 mm at ID & OD H RW
(inside & outside) 3pipes/shift dimensional report
5.3.3 Visual Inspection
Point 7

All pipes shall be free from defects in the finished
Clause 9.10.2 of API 5L condition.
& As per client
11.6 Cracks & leaks specification M01 Clause If any All pipes shall be free from cracks and leaks. Cracks shall ------- H RW
5.3.3 Visual Inspection not be repaired.
Point 4 The acceptance criteria for imperfections found by NDI
shall be in accordance with annex E of API 5L
Undercuts that have a depth < 0.4 mm are acceptable
regardless of length, and shall be treated in accordance
with clause C.1 of API 5L
Undercuts shall not exceed 0.5 mm in depth and 25 mm
Clause 9.10.2 of API 5L in length.
& As per client Visual &
11.7 Undercuts specification M01 Clause If any 1. there are no more than two such undercuts in dimensional H RW
5.3.3 Visual Inspection any 300 mm length of weld, and report
Point 5 2. All such undercuts are treated in accordance
with clause C.2 API 5L.
The undercuts that exceed the limits specified in item b)
shall be classified as defects and shall be treated in
accordance with clause C.3 of API 5L.


Clause 9.13.2.2 of API
Inside & outside weld Visual &
5L & per client Weld reinforcement shall be removed Up to 150mm
11.8 bead grinding (End Each pipe dimensional H RW
specification M01 clause externally & 150mm internally at both ends of the pipe.
flushing) report
5.3.3.9

Any hard spot having dimension greater than 50 mm in
Clause 9.10.6 & 10.2.4.8 any direction & hardness greater than 345 HV10 shall be
11.9 Hard spots(if any) If any Visual report H RW
of API 5L rejected. Pipes containing such defects shall be treated in
accordance with Clause no. C.3b) or C.3c) of API 5L.

As per client
specification M01 clause No Lamination accepted within 25 mm circumference of
11.10 Laminations If any Visual report H RW
5.3.3.non destructive test pipe ends.
clause 1.

Arc burns shall be treated in accordance with Clause-C.2,
C.3(b) OR C.3(c) except that they may be removed by
chipping or machining, provided that the resultant cavity
11.11 Arc burns Clause 9.10.3 of API 5L If any Visual report H RW
is thoroughly cleaned and checked for complete removal
of damage material by etching with 10% solution of
ammonium per sulfate or a 5%solution of natal.

Other defects (Geometric API 5L clause 9.10.5,
11.12 If any Other Geometric deviations as per API 5L clause 9.10.5.1 Visual report H RW
Deviations & Scratch Mark) 9.10.7

API 5L 8.10 or As per For finished helical seam pipes the junction of the strip Visual &
Skelp end welds in finished
11.13 client specification M01 If any end welds and helical-seam welds shall be at least 500 dimensional H RW
pipes
clause 4.2.3 mm from the pipe ends. report

API 5L clause 9.10.5.1 &
Visual &
As per client spec. M01
11.14 Peaking If any Max 1.5mm dimensional H RW
clause 5.3.3(Visual
report
Inspection 6)


DIMENSIONS,
12
WEIGHTS & LENGTHS

As per client - 0.5mm & + 1.5 mm of nominal wall thickness Visual &
12.1 Wall thickness specification M01 Clause Each pipe If Grounded areas the wall thickness measured shall be dimensional H RW
5.3.3.6 & 5.4.1 within ± 0.1times of nominal WT. Report

Item # 1,#2,#3 shall be supplied in following length
• Min Length – 12.00 meters
• Max Length – 18.00 meters
As per client Visual &
12.2 Pipe length specification M01 Clause Each pipe • Min AVG Length – 15.00 meters dimensional H RW
5.3.3.7 For Item #4 Report
• Min. Length – 10.00( upto 5% of the order
quantity)
• Max. Length – 12.2 meters

Each pipe Total deviation from straight line for all pipes shall not Visual &
Clause 9.11.3.4 of API
12.3 Straightness exceed 0.2% of the pipe length & 4.0 mm max for a dimensional H RW
5L
distance of 1000 mm from the extreme pipe ends. Report

API 5L Clause 9.11.3.1 SWCC Spec M01, Cl 5.3.3.2, specifies. Inside Diameter
Outside diameter at the Table-10 , Clause - Each pipe measurement at ends and the ID Tolerance of same are Visual &
12.4 pipe end over a length of 10.2.8.3 & As per client given in this MITPS sr no 12.6. ( This alternate dimensional H RW
100 mm specification M01 Clause measurement is permitted by API 5L Table 10 Note c & Report
5.3.3.1 clause 10.2.8.3)

12.5 Outside diameter at pipe As per client Visual &
body (measured with pie specification M01 Cause Each pipe OD = + 3.00 mm max. dimensional H RW
tape & recorded) 5.3.3 of 3 Report


Inside diameter at the pipe
end over a length of 100
12.6 specification M01 Cause Each Pipe ID = + 1.6 mm max. dimensional H RW
mm (measured with pie
5.3.3.2 Report
tape & recorded)

As per client
Visual &
specification M01 Cause
12.7 Out of roundness Each Pipe As per Sr.No. 12.7.1 & 12.7.2 dimensional H RW
5.3.3.4 & API 5L Table
Report
10

Visual &
Each pipe & record 3
12.7.1 At Pipe Ends As Agreed 1% of pipe Nom Diameters dimensional H RW
pipes/ shift
Report

Visual &
Each pipe & record 3
12.7.2 At other than ends (Body) As Agreed 1.5% of pipe Nom Diameters dimensional H RW
pipes/ shift
Report

Visual &
12.8 Weight Clause 9.14.1 of API 5L Each pipe + 10% & - 3.5 % of nominal weight dimensional H M
Report

Pipe Ends & End
12.9
Protectors

As per client Bevel angle. 30° (+5°, -0°) Visual &
12.9.1 Bevel angle & root face specification M01 Clause Each pipe dimensional H RW
5.3.3.9 Root face 1.6 mm (± 0.8 mm) Report

At least 3 pipes per
12.9.2 End Squareness specification M01 Clause Squareness ≤1.6 mm dimensional H RW
shift
5.3.3.9 Report

Metallic bevel end protector shall be provided at both
13 Bevel protectors ------- Each pipe ------- H M
ends.


Repair prohibition &
14
procedure

As per client
Approved WPS &
14.1 Repair procedure specification M01 clause If any As per approved WPS & PQR H H
PQR
5.4.2 & API 5L

Following requirements shall also be complied with for repair
welding
• The total length of repaired zone on each pipe weld
shall be < 4% of the total length of weld.
• Weld defect separated by less than 100 mm shall be
repaired as a continuous single repair.
• Each single repair shall be carried out with a
minimum of two layers/passes over a length of at
least 50 mm.
• If Repaired after Hydro Testing the pipe shall be re-
hydro tested after repair.
API 5L & As per client Rectification
• Weld repair shall be performed using a qualified
14.2 Repair Prohibition specification M01 clause If any WPS.
report / approved H RW
5.4.2 • After weld repair, the total area of the repair shall be WPS & PQR
radiographically& ultrasonically inspected in
accordance with Annex E of API 5L.
• Through thickness & Crack repair is not allowed.
• LOP >100 mm is not acceptable. It is Subject to
Rejection.
• Repeated repair at the same spot are not allowed.
• Repair by welding on base material is not
Permitted.
Repair By Grinding may be applied as per API 5L provided
the remaining wall thickness is not less than 0.1 of the
nominal wall thickness.
Test report & Insp. & test
15.0 API 5L clause 13 Each pipe All documents as per API 5L H R
certification of pipes reports


Marking shall be on the inside surface of the pipe, starting of a
point at least 150 mm from one of the pipe ends and include the
following information, as applicable.

1. Name or mark of the manufacturer.

2. Specified outside diameter.

3. Specified wall thickness.

4. Pipe steel grade.

5. Product specification level designation.
clause 11.2.1 of API 5L & 6. Type of pipes. (Table 2 of API 5L )
16.0 Marking on finished pipe As per client specification Each pipe one End ------- H M
M01 clause 6.2.2 7. Mark of customer’s inspection representative if
applicable.

8. An identification number which permits the
correlation of the product or delivery unit with the
related inspection documents, if applicable.

9. For specified outside diameter marking in USG or SI
unit, it is not necessary to include the ending zero
digit to the right of the decimal sing.

The area of the pipe to be marked shall be clean and dry The size
of the lettering shall be 20 mm. Pipe number shall be stamped on
bevel

(B) PRODUCTION TESTS

Chemical analysis (Product Table 18 of API 5L 2 pipes / heat All elements as per Annexure – A of this MITPS Chemical test
B.1 – Base Metal) 10.2.4.1 report H H

B.2 Mechanical Tests


For PSL 2 pipe, the tensile properties shall be given in
Table 7.
The tensile test shall be carried out in accordance with
ISO 6892 or ASTM A370.
API 5L clause 9.3.2, For pipe body tests, the yield strength, the yield ratio and
10.2.3.2, 10.2.4.2, Table the percentage elongation after fracture shall be
Transverse tensile test 1 pipe/ heat & 1 per determined.
B.2.1 7 &18 and As per client Mech. Test report H H
(Base Metal) test unit
specification M01 clause The percentage elongation after fracture shall be reported
5.3.2 B.1 with reference to a gauge length of 50 mm (2 in.). For test
pieces having a gauge length less than 50 mm (2 in.), the
measured elongation after fracture shall be converted to a
elongation in 50 mm (2 in.) in accordance with ISO 2566
or ASTM A 370.
Test pieces for tensile test as per clause 10.2.3.2.
(The samples shall be taken in such a way that
API 5L or As per client
Transverse tensile test - 1 pipe/heat/ & 1 per the testing frequencies of API including weekly
B.2.2 (a) specification M01 5.3.2 Mech. Test report H H
Helical Weld Seam test unit weld tensile test per welding line is
B.2
complied)

One face and one root face bend weld test shall be made
Guided bend test Helical API 5L or As per client on samples cut from pipe.
B.2.3 (a) 1pipe / per test unit Mech. Test report
Weld Seam specification M01 5.3.2 The dimension ‘A’ in guided bend test shall not be H H
B.3 exceed 4 times of the specimen thickness
Acceptance criteria shall be as per API 5L

API 5L or As per client Sub size specimen as applicable shall be used.
CVN Impact
B.2.4 specification M01 5.3.2 1 pipe / per test unit Acceptance for full size specimen shall be : Test Report H H
Helical Weld Seam B.4
As per API 5L table 8

Hardness test API 5L or As per client
B.2.5 specification M01 5.3.2 1 pipe / per test unit Max.300 HB Test report H H
Helical Weld Seam D


Metallographic
examination (macro 1 pipe / shift / 50 The alignment of internal and external seams shall be
B.2.6 etching) Clause 10.2.5 of API 5L Test report H H
Pipes from same heat verified.
Helical Weld Seam

Skelp Weld – API 5L clause 9.3.2,
Tensile,Charpy,bend,hardn 10.2.3.2, 10.2.4.2, Table Once per Lot of 50
B 2.7 Refer B 2.2,2.3,2.4,2.5 & 2.6 acceptance criteria Test report H H
ess & macro 7 &18 and As per client skelp weld pipes
specification M01

As per client
specification clause no
Retesting & rejection 5.3.2.C & API 5L Annex
B.3 If any As per clause 10.2.12.1 of API 5L & Annex N Test report H RW
criteria N

C FIRST DAY PRODUCTION TEST (ONE PIPE OF COMPLETELY FINISHED PIPE OF FIRST DAY’S PRODUCTION ) As per client specification M01 4.2.4 & 4.2.5

As per client
C.1 Hydrostatic test specification M01 clause PQT pipe As per clause. 5 of this MITPS MPQT report H H
5.3.2 A(2)

Clause E.3.1 & Table E1
Automatic & manual MPQT report
of API 5L & As per Complete weld length shall be UT tested as per clause.
C.2 Ultrasonic testing (Weld PQT pipe H H
client specification M01 8.0 A, 8.0 B & 8.1 OF this MITPS
and Body)
clause 4.1.1

As per Client PQT Pipe –
Radiographic testing of
C.3 specification M01 Clause Fluoroscopy Entire As per clause 6.1 of this MITPS MPQT report H R
weld seam
5.3.2 A3 weld length


API 5L & As per client Pipe shall be examined visually for dimensional tolerance H H
Visual & dimensional
C.4 specification M01 Clause PQT pipe and apparent surface defects As per clause 11.0 & 12.0 of MPQT report
examination
5.3.1 this MITPS

Chemical analysis PQT pipe (1 samples/ All elements as per Annex. A of this MITPS for Base and H R
C.5 API 5L as per approved WPS for Weld MPQT report
(Product-Base & Weld) pipe)

ALI 5L & As per client
C.6 Mechanical test specification M01 Clause MPQT report
5.3.1

C.6.1 Transverse Base Tensile API 5L PQT pipe MPQT report H H

C.6.2 Transverse Weld Tensile API 5L MPQT report H H

In accordance with clause no. 10.2.4.6, 10.2.3.6 & table
C.6.3 Guided bend test API 5L PQT pipe 23 of API 5L. MPQT report H H
Acceptance as per Clause 9.7.1 of API 5L

CVN impact for base, weld and HAZ at Test
Temperature, Zero Degree C shall be done and the
acceptance for full size specimen shall be as per API 5L
API 5L As per client Table 8.
CVN Impact
C.6.4 specification M01 Clause PQT pipe Additionally Transition curve shall be established by MPQT report H H
Pipe Body, Weld & HAZ 5.3.1.5 testing at following Test temperatures, -40°C,-20°C, 0°C,
20°C & 60° C, for Each Location. The transition curve
will be plotted. This is for information only and no
acceptance criterion is stated.


Test temperature =0°C
CVN Impact of Skelp end
C.6.5 API 5L PQT PIPE Acceptance for full size specimen shall be : Test Report H W
welds (Weld and HAZ)

Guided bend test of In accordance with clause no. 10.2.4.6, 10.2.3.6 & table H
1 set from skelp Mech. Test report
C.6.6 API 5L 23 of API 5L. W
Strip end weld (Root &
face) Acceptance as per Clause 9.7.1 of API 5L

Transverse tensile test As per API 5L table 7 H
C.6.7 API 5L 1 skelp end weld Mech. Test report W
(Strip end weld)

Metallographic
examination(macro The alignment of internal and external seams shall be
C.6.8 API 5L PQT pipe MPQT report H W
etching)Helical & Skelp verified.
end welds

Hardness test Helical & W
C.6.9 API 5L PQT pipe 318 HV 10 as per clause 5.3.2.D of cust. spec MPQT report H
Skelp end welds

LEGENDS: H- HOLD, W- WITNESS, M- MONITER, R- REVIEW, RW = RANDOM WITNESS, TPI-THIRD PARTY INSPECTION AGENCY, FDPT – FIRST DAY PRODUCTION TEST,WI-WORK INSTRUCTION


ANNEXTURE – A
MAX. % ALLOWED MAX. % ALLOWED
ELEMENT ELEMENT
X52M X52M
C 0.20 CE(IIW) 0.43%
Notes:
Mn 1.40 1) For each reduction of 0.01% below the specified maximum for
Si 0.45 carbon, an increase of 0.05% above the specified maximum for
manganese is permissible, up to a maximum of 1.65% for X 52
P 0.025 Grade.
S 0.010 2) CE (Pcm)= C + Si/30 + (Mn+Cu+Cr) / 20 + Ni/60 +Mo/15+ V/10
+5B
Cr 0.30
3) CE (IIW)= C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15,
0.50 d) The sum of the niobium, vanadium and titanium concentration
Co
shall be ≤ 0.15%.
Mo 0.15

Ni 0.30

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