The Design Secrets of Slide Plates

Editor's Notes

• #2: Display this slide before the presentation begins, while viewers are joining…. Do not say what is on slide…. Switch to next slide before welcoming
• #4: For those of you who are unfamiliar with us, I want to quickly go over some background information. If you would like to know more, please visit our “About Us” section at www.pipingtech.com. Our parent company, Piping Technology & Products, Inc., also known as PT&P, has been… in business since 1975, PT&P and its wholly owned subsidiaries, US Bellows, Sweco Fab, Pipe Shields, and Anchor Darling, offer a wide range of engineered products and services for various industries and applications. Our product line is extensive… from engineered pipe supports, expansion joints, pre-insulated pipe supports, and miscellaneous fabrication to various engineering and technical services, PT&P has decades of experience providing products and services for all your engineering and construction needs. DO NOT go over certifications—they are on the next slide…
• #5: We have achieved various certifications in the past 30 years: PT&P is a member of MSS, SPED, and APFA. We are also a Minority Business Enterprise, as well as, a member of the Houston Minority Business Council. Our U.S. Bellows division is a member of the Expansion Joint Manufacturers’ Association We have the ASME U-Stamp, R-Stamp and N-Stamp for our Sweco Fab division Pipe Shields is ISO 9001-2000 certified for the manufacture of hot and cold supports And we are ASME Nuclear Qualified in our Fronek Anchor Darling division Manufacturing Facility This photo shows an aerial view of our headquarters here in Houston, Texas Our facility is located on a thirty-five (35) acre property including additional room for future expansion We are just miles away from the Port of Houston which allows us to quickly and conveniently ship to a variety of countries throughout the worl
• #6: Milestones
• #7: PT&P offers a wide range of products and services which are listed here in no particular order. We will quickly go over the full product line towards the end of the presentation; however, you can view all of our products and services online at www.pipingtech.com.
• #8: Coefficient of Friction -Motion of supported element in relation to the supporting element -Effort to reduce coefficient of friction Rollers: (Coefficient of Friction .01 to .1) Larger loads, hanging support, load carrying member Slide Plates: (Coefficient of Friction .07 to .15) Limited space, not capable of taking full load (used in combination with another support), large temperature range Silver roller picture: W:\\digital_camera\\2005\\Oct2005\\job84370_roller
• #9: Hanger Type Roller (standard pipe size range is 2 1/2-20") (standard load range is 225-1600 lb.) Material: Cast iron roll; carbon steel yoke, roll rod, and hex nuts. Service: For suspension of pipe from a single rod where horizontal movement may occur because of expansion or contraction. Base Mounted Roller Chair: (standard pipe size range is 2-24") (standard load range is 600-6160 lb.) Material: Cast iron roll and sockets, steel roll rod, continuous thread rods and hex nuts Service: For support of pipe where horizontal movement due to expansion and contraction will occur and where vertical adjustment up to 6 inches may be necessary Trapeze Roller Hanger: (standard pipe size range is 1-30") (standard load range is 600-7290 lb.) Material: Cast iron roll and sockets, steel roll rod Service: For suspension of pipe from two rods where longitudinal movement due to expansion or contraction may occur
• #10: Pipe Rollers with a Red Oxide Primer Finish Maximum Load: 5000 lb. 18" modified figure 210 (Roller Chair) W:\\digital_camera\\2005\\April05\\rollers_81643
• #11: 24" pipe; non-conductive Polyurethane Pipe Rollers for a Gas Plant in California; Pre-tested for an operation of load of 6100 lb.; Will be used to support gas piping where a non-conductive support is required; Made from a square block of Polyurethane (hand-made) http://www.pipingtech.com/news/arc_pw_2005/sacs2005_04.htm W:\\digital_camera\\2004\\May\\polyurethaneRoller_050704
• #12: 72" and 60" Heavy Duty Roller Stands for a Cooling Tower Support load up to 60,000 lb. while allowing the pipe axial movement during temperature fluctuation Rollers are fabricated from machined carbon steel and A-36 carbon steel plate for the round bar http://www.pipingtech.com/news/arc_pw_2003/sacs2003_05.htm X:\\Graphics\\FEA
• #13: 8 Roller Stands for a Company that Manufactures "Fired Heaters" in Oklahoma Roller stands are used to support pipelines that expand and contract longitudinally in the axial direction and where vertical adjustment is not necessary. Stainless steel and designed for a 26" pipe. They weigh 160 lb. and are capable of supporting 7,500 lb. Load testing at 1,000°F was completed for performance assurance. http://www.pipingtech.com/news/arc_pw_2005/sacs2005_05.htm W:\\digital_camera\\2005\\July05\\job82668_roller
• #14: Big ton springs equipped with special rollers to accommodate a moving apparatus and support piping at a refinery in India.  The specially designed big tons were made to support loads ranging from 55,000 lb. to 114,000 lb. with no more than 5/16" upward movement. Its composition comprises of A-36 carbon steel, built to a maximum height of 23-5/8". The special rollers installed on the top of the load flange, keeps the aforementioned loads moving smoothly under all kinds of conditions. To further assure their quality, each of the big ton spring assemblies underwent load testing and afterward were hot dipped galvanized to prevent against corrosion. POTW: http://www.pipingtech.com/news/arc_pw_2002/engps2002_12.htm FEA Image: K:\\EdBackup\\FEA\\Studies\\PTP Figure Data\\BigTon\\64481
• #15: F-type variable springs with rollers to be used in a refinery in Kansas. Fabricated from carbon steel with a stainless steel clamp-on shoe that attaches to the load column. 23" in height and upward travel is 3" Operating load: 1,000 lb.; Installed load: 1,300 lb. The function of this custom designed variable spring is to allow large axial movement along the axis of the pipe centerline. The load column is modified to accommodate the special clamp-on shoe. The customized wheels allow for movement of the entire spring assembly in conjunction with the pipe. http://www.pipingtech.com/news/arc_pw_2008/engps2008_01.htm
• #16: This constant utilizes sealed cam follower roller bearings in place of slide plates that are generally used between the moving table and stationary frame. The rollers help to reduce the friction on the table, reduce residual loads which improve constant deviation, and help to restrict table movement in horizontal directions. These U-Type constants are fabricated from A36 carbon steel with dimensions of 28"H x 37"L x 17"W. The boxing, bolting patterns and loading table location are custom designed per customer specifications. The design also includes a graphite plate bonded to the top of the load flange to reduce the friction between the constant load flange and the saddle support above it. The supports are designed to carry 3015 lb. of piping load with an upward travel of 6". The constants underwent standard load and travel testing before being shipped to an energy plant. http://www.pipingtech.com/news/arc_pw_2009/engps2009_04.htm
• #17: For this Webinar, we are going to mainly concentrate on slide plates. Slide plates are a very cost-effective way to allow for movement of mechanical systems for very high temperatures and cryogenic temperatures as well. They are also suited for both high and low loads. We supply slide plates for a variety of applications including support of piping, heavy equipments such as pressure vessels, and structural members. The plates provide a surface with a low coefficient of friction which can be attached to a supporting structure This combination provides support while simultaneously allowing an object to move or slide freely along the supporting structure. Shown here are the five main materials used, which are: PTFE, 25% Glass Filled, Bronzphite ®, Marinite, Graphite and Stainless Steel.
• #18: Most designers use the “sandwich” concept, which is simply two slide plates one on top of another. Each slide plate is composed of two components: 1) metal backing plate, which is the “bun” of the sandwich and two 2.) a low coefficient friction material which is bonded to the metal backing plate The illustration to right shows a slide plate that is welded on top of one steel beam supporting another steal beam. When the top beam moves, it slides across the surface of the plate without contacting the supporting beam. The top half of the “sandwich” is bonded to the sliding beam, bottom half of “sandwich” to the supporting beam. Permits ease of installation
• #19: DO NOT, DO NOT, DO NOT….. DO NOT SAY TEFLON…. !!!!! The first material we will discuss is: PTFE, 25% glass filled slide plates are primarily used in low heat and high velocity conditions; however, this material can be used in high heat applications in conjunction with other materials. We also use this type of slide plate where there is high wear resistance, no surface treatments necessary or is unaffected by weather conditions. The slide plates you see in the background are used for cable trays that are located on a floating structure. They are used to reduce friction between the cable trays and the structural steel it is resting on. They are bonded to stainless steel backing plates that are bolted to this structure. Listed here are common applications for PTFE, 25% glass filled slide plates. DO NOT, DO NOT, DO NOT….. DO NOT SAY TEFLON…. !!!!! If you need it…. NOTE: PTFE, 25% Glass Filled: PTFE is the abbreviation for Polytetrafluoroethylene. PT&P uses PTFE filled with 25% Glass Fibers (by weight). Fillers improve the strength and durability.
• #20: We use our standard assembly for welding to mating surfaces, which is two units 3/32 " PTFE, 25% glass filled bonded to 1/8 " carbon steel with a 1/2 " lip for field tack welding. For higher load capacities, we use a full weld assembly, which is two units of 3/32 " PTFE, 25% glass filled bonded to indicated backing material with ½ " lip all around for full welding.
• #21: Starting from the left, you see F-Type variable spring supports that have PTFE, 25% glass filled slide plates welded to the top of the load flange. The slide plates will allow for translational movement. Next is 43 " angled pipe shoes with a slide plate welded to a carbon steel plate, then welded onto the shoe to allow movement of the pipe during expansion and contraction. And lastly, you see a 200 U-Type constant spring support with a slide plate welded to the load flange to reduce the friction between the constant load flange and the structure above the support. This constant also includes slide plates between the table and the frame of the constant to reduce the friction on the table and improve constant deviation.
• #22: 8 ' long big ton variable spring assembly fabricated from carbon steel components with a painted finish designed for a local area refinery. The top of the load flange has 3 PTFE, 25% glass filled, slide plates. The base is 96 " by 18 " and the installed height is 24 " . This big ton will be utilized to support heavy loads where a standard variable spring would be undersized. The big ton spring design includes an array of parallel coils within one frame to produce large load carrying capacity while maintaining the same spring rate. The assembly is designed to withstand an operating load of 76,800 lb. and has a downward travel of 0.894". Prior to fabrication, each of the coils were individually tested to insure correct spring rate and load capacity. After fabrication, the entire assembly was tested throughout the entire load and travel range.
• #23: Here we show slide plates in conjunction with hold downs: The top right picture shows a hold down clamp with a PTFE, 25% glass filled lining and wedge supports for a 42 " pipe. The hold down and wedge supports are fabricated from A26 carbon steel and include a fabric pad which is exceptionally suited for vibration impact and declination The lower-left picture shows HD-2 hold down clamps that will be used to fit a 16 " pipe at an oil refinery in Michigan. This particular design is generally used on pipelines where there is a high temperature and great thermal movement requirements. Hold downs allow for axial movement while restraining lateral movement. The clamp and base plate are fabricated from carbon steel with PTFE, 25% glass filled, material bonded to the radius and plate. The palette of hold downs pictured here are designed to fit 6 " to 8 " pipes at a chemical refinery in Louisiana. These particular clamps are fabricated from carbon steel with 3/32 " PTFE, 25% glass filled, bonded to the radius.
• #24: The coefficient of Friction of PTFE, 25% Glass Filled slide plates has been variously reported to be from point-zero-one to point-two (0.01 to 0.2). This depends on the surface preparation, loading, velocity, and the duration of the test. Bonding PTFE, 25% glass filled to metal increases the load capabilities in excess of two-thousand PSI (2000 PSI). This table shows the coefficient of friction due to the load applied. A conservative coefficient of 0.1 can be used in PTFE, 25% glass filled slide bearing designs without considering sliding speed, temperature, or maintenance. The advantages of using this material are: 1. no setting problems, 2. low coefficient of friction, 3. no surface treatments, grouting or expensive mechanical attachment necessary, 4. chemically inert, 5. unaffected by weather conditions, 6. ability to absorb dirt and grit within itself and 7. self-aligning when used in conjunction with elastomeric backing pads.
• #25: Graphite can be used at higher operating temperatures and may be mechanically bonded or screwed where applicable. Bolted affords extra degree of holding strength, in the case of extremely high temperatures, the glue may weaken. The advantages of using this material are: 1. high operating temperature, 2. ease of installation, 3. no setting problems, 4. low coefficient of friction, 5. no surface treatments, grouting or expensive mechanical attachment necessary, 6. chemically inert, 7. unaffected by weather conditions, 8. has the ability to absorb dirt and grit within itself and 9. self-aligning when used in conjunction with elastomeric backing pads.
• #26: In our standard assembly, we use two units of Graphite bonded to 1/8 " thick carbon steel. ¼ " thick lip for field track welding. For full weld assembly, we use two units of Graphite bonded to indicated backing material with ½ " lip all around for full welding. Graphite slide plates typically handle loads of up to 2,000 PSI. and are designed for high operating temperatures of up to +1,000ºF. Picture of Graphite Maybe: W:\\digital_camera\\2005\\Oct2005\\job83967
• #27: We designed 18 Graphite slide plates that will be tack welded on top of big ton spring supports in a refinery to minimize frictional effects. The Graphite sheets are 6 mm and 12 mm thick and the overall dimensions are 3/8 " x 19-11/16 " x 19-11/16 " and 3/8 " x 61 " x 61 " .
• #28: Top sheet of graphite measures ½ " x 11 ½ " x 115 ½ " Includes a bottom sheet of graphite with the same dimensions but only ¼ " Each individual graphite sheet is bonded to a hot dipped galvanized backing plate A ½ " lip all around for full welding Designed for 1,000 ºF 9 ½' long
• #29: Bronzphite is best suited for high loads, low velocity applications and in places where the use of oil or grease is undesirable or unfeasible. The area that is utilized can reach temperatures up to 500 ° F. Bronzphite is maintenance free and self lubricating where the lubrication does not deteriorate with wear; therefore, it has a high wear resistance; as well as, prevents accumulation of dust and debris. Advantages include: self-lubricating components and maintenance free Explain the circular design of the graphite
• #30: The Bronzphite® slide plates shown here are constructed from graphite and phosphorus bronze There were designed for up to 500ºF temperatures and a total travel of up to 30 " The dimensions rang from 3" x 3" to 6" x 36 " Framework is fabbed to encompass…
• #31: Here you see a project we completed that included 75 Pipe Shoe and Bronzphite® Slide assemblies for an oil refinery in Texas. Each assembly consists of two pipe clamps, a base plate and a 3" x 3" Bronzphite® slide plate with graphite impregnated bronze. The shoes ranged in sizes from 18" -24" and are fabricated from A387 alloy steel. The are designed for 965ºF and 2" of horizontal travel. W:\\digital_camera\\2004\\Feb\\73993_shoes_73985
• #32: Marinite is a higher density insulation formed from Calcium Silicate, which is light weight, has a low bulk density, a low thermal conductivity, a high temperature and chemical resistance. We generally provide Marinite as a rectangular slide plate assembly consisting of a Marinite insulator block sandwiched between a stainless steel top and bottom plate Benefits Include: - Facilitates use of PTFE, 25% glass filled material on high-temperature lines. - Marinite being a high load bearing insulation material is ideal for the dynamic loading conditions.
• #33: Marinite allows for the use of PTFE, 25% glass filled, as the sliding surface for lines with high operating temperatures and high dynamic loading. It protects the PTFE, 25% glass filled material by acting as a barrier to heat transfer. It has so far been used for power plants in high energy systems like SHP and SIP. It could potentially be used wherever there are top, bottom or lateral movements the point support. Compact configuration providing sliding and insulation properties
• #34: Marinite assemblies using 2 ¾ " thick Marinite blocks Used to reduce heat transfer between the duct work supports and the supplementary steel shown The slide plate assemblies were fabricated from a combination of stainless steel for the low-friction sliding surface and 2-3/4" Marinite insulation to isolate the higher temperatures. A fabric reinforced isolator pad was placed between the slide plate and the I-beam for vibration control. The slide plates were tested for both load and heat transfer and will be utilized in a chemical plant.
• #35: Test of thermal conductivity Heat probes used to record the temperature gradient Used to verify applicability of Marinite sections W:\\digital_camera\\2006\\04 Apr\\SlidePlateTempTesting
• #36: Test to confirm compressive strength of Marinite and the enclosure Very high load rating was achieved Optimization of enclosure material
• #37: Stainless steel is used in extremely corrosive environments and/or extreme temperature conditions Used in applications where extreme durability is required Eliminates the need for separate backing plate Can readily be affixed to contours (curves, corners, angles, etc.) Overall combination: Thinnest of Available slide plate assemblies Can be modified in the field to suit Available in variety of surface finishes
• #38: Big ton springs for a chemical processing plant Fabricated from carbon steel with hot dipped galvanize finish Include stainless steel slide plates
• #39: I:\\Davidb\\SRP Project\\SRP Project
• #40: Permali Block and PTFE, 25% Glass Filled Slide Plate
• #41: Combination slide plate materials, including stainless steel and phosphorus bronze used to support vessels The carbon steel base plate will be securely anchored to a foundation Instead of welding, the lower slide plate will be affixed to the carbon steel base by countersunk attachment bolts The upper slide plate is fabricated from a phosphorus bronze plate with machined grooves on the underside The grooves allow lubrication between the contact surfaces of the upper and lower slide plates
• #42: The grease is replenished through the grease fitting pictured here The stainless steel is polished to achieve a low coefficient of friction Countersunk bolts are used to avoid interference The hole you see to the right of the slide plate is the access point for pouring the grout after installation
• #44: Our engineering and design department is involved in the following processes: -Piping, Pipe Support and Structural Design -3D Modeling Technology -Pipe Stress Analysis, in which we use Caesar II -For Structural Analysis, we use STAAD II -Our engineering and design department uses Finite Element Analysis for many projects: -FEA is used for Special Stress and/or Thermal Problems -It is used in 3D Part Design -They use ANSYS for Mesh Generation and Analysis and Results Analysis -Our Engineering and Design department is also involved in Field Testing.
• #46: PT&P offers on-site installation guidance, inspection and/or maintenance of pipe supports and snubber inspection. We carry a system of stock standard items and have an “on-call” engineering team available 24x7.
• #48: Since we don’t have much time this evening, you may want to check out our website; there you will find a plethora of technical information, including different Tests we carry out, FEA Analysis, and much more.
• #49: That concludes our Webinar on Slide Plates and Pipe Rollers…. I hope everyone enjoyed the presentation and as a reminder, we have a staff of experts for each product category standing by to answer any questions you may have. You can just chat them now while in session until the end of the hour, you can also send them to us by e-mail at info@pipingtech.com