Engineered Spring Supports Webinar - September


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  • Note: This particular spring can has a cut-away view for demonstration purposes
  • Note: We use double-point suspension instead of single-point suspension
  • Note: Other vendors supports—not PT&P
  • Note: Other vendors supports—not PT&P
  • Note: Other vendors supports—not PT&P
  • Note: Other vendors supports—not PT&P
  • Note: In the case you want to use your existing spring support
  • Engineered Spring Supports Webinar - September

    1. 1. Piping Technology & Products, Inc. Engineered Spring Supports Presents
    2. 2. Who is PT&P <ul><li>Pipe Shields, INC. </li></ul><ul><li>Insulated Pipe Support </li></ul><ul><li>Commercial & Light industrial </li></ul><ul><li>Heavy Industrial - based on Mounted, Anchors </li></ul><ul><li>Pipe Riser Clamps </li></ul><ul><li>Fronek A/D E. </li></ul><ul><li>Hydraulic Snubbers </li></ul><ul><ul><li>Short strut </li></ul></ul><ul><ul><li>Adjustable strut </li></ul></ul><ul><li>Mechanical Snubbers </li></ul><ul><li>dynA/Damp Compensating Strut </li></ul><ul><li>ASME Nuclear Qualified </li></ul><ul><li>SWECO FAB, INC. </li></ul><ul><li>Pressure Vessels </li></ul><ul><li>Pig Launchers/Receivers </li></ul><ul><li>Spectacle/Line Blinds </li></ul><ul><li>Instrument Supports </li></ul><ul><li>ASME/Misc. Fabrication </li></ul><ul><li>ASME U-Stamp </li></ul><ul><li>U.S. Bellows, INC. </li></ul><ul><li>Metallic Expansion Joints </li></ul><ul><li>Thin-wall, Thick-wall </li></ul><ul><li>Rectangular Expansion Joints </li></ul><ul><li>Fabric Expansion Joints </li></ul><ul><li>Slip-type </li></ul><ul><li>Member of EJMA </li></ul><ul><li>PIPING TECHNOLOGY & PRODUCTS, INC. </li></ul><ul><li>Engineered Pipe Supports </li></ul><ul><ul><li>Variable, Constants, Big-tons </li></ul></ul><ul><ul><li>Vibration Control Devices – Snubbers, Sway Struts </li></ul></ul><ul><ul><li>Support Assembly Components – Clamps, misc. hardware </li></ul></ul><ul><ul><li>Pre-insulated Pipe Supports – Cryogenic/cold & Hot Applications </li></ul></ul><ul><ul><li>Fabricated Pipe Shoes, Guides & Anchors </li></ul></ul><ul><li>Slide Bearing Plates </li></ul><ul><li>Anchor Bolts, Embed Plates </li></ul><ul><li>Member of MSS, SPED, APFA </li></ul>
    3. 3. Engineered Spring Supports Introduction
    4. 4. Engineered Spring Supports Introduction <ul><li>A device designed to support a specified load - weight of the pipe, commodity, flanges, valves, refractory & insulation through the install to operating thermal deflection cycle. </li></ul>
    5. 5. Engineered Spring Supports Types <ul><li>Variable spring support </li></ul><ul><li>Variable hanger </li></ul><ul><li>Constant load hanger </li></ul><ul><li>Counterweight </li></ul>
    6. 6. Variable Spring Supports <ul><li>Variables use coiled springs to support a load and allow movement </li></ul><ul><li>The resistance of the coil to a load changes during compression, which is why these devices are called “variables” </li></ul><ul><li>There are many different designs for variable supports and a particular nomenclature used to identify them </li></ul>
    7. 7. Variable Spring Supports Type A <ul><li>Type A </li></ul><ul><li>Furnished with a threaded bushing in the top plate, providing for a simple rod attachment for the upper connection </li></ul>
    8. 8. Variable Spring Supports Type B & C <ul><li>Type B & C </li></ul><ul><li>Furnished with one or two lugs welded to the top cap plate of the casting </li></ul>Type B Type C
    9. 9. Variable Spring Supports Type D <ul><li>Type D </li></ul><ul><li>Permits adjustment from the top, by turning the nuts on the hanger rod against a piece of tubing </li></ul><ul><li>Tubing is securely welded to the spring cap </li></ul><ul><li>Spring is set above the supporting steel </li></ul>
    10. 10. Variable Spring Supports Type E <ul><li>Type E </li></ul><ul><li>Permits rod adjustment from either above or below the spring </li></ul><ul><li>Spring is set above the supporting steel or can be welded directly to the supporting steel from below </li></ul>
    11. 11. Variable Spring Supports Type F <ul><li>Type F </li></ul><ul><li>Designed to support piping from below, directly from the floor or supporting steel </li></ul><ul><li>Adjustment is made by inserting a bar into holes in the load column and turning the load column as a jack screw </li></ul><ul><li>Base plate is bolted to the case and has four holes for fastening </li></ul>Custom Designed Type F Variables
    12. 12. Variable Spring Supports Type G <ul><li>Type G </li></ul><ul><li>spring support assembly is formed by welding two standard spring assemblies to the ends of a pair of channels. </li></ul><ul><li>can accommodate unusually heavy loads </li></ul><ul><li>adaptable for avoiding interference in spaces where headroom is limited. </li></ul><ul><li>can be furnished with center-to-center dimensions </li></ul>
    13. 13. Spring Loading/Assembly Check Hot & Cold Loads Compress Spring to Solid and Release 3 Times Zero out Load Cell Compress Spring to Cold Load Mark Cold Location on Can Measure for Travel Stop Length Compress Spring to Hot Load
    14. 14. Spring Loading/Assembly Mark Hot Location on Can Measure Distance Between Loads Should Match Desired Travel Compress Spring to Cold Load & Place in Travel Stops Release Load and Check Travel Stops Remove Spring & Move to Table Using Hoist
    15. 15. Spring Loading/Assembly Add Name Tag and Straps Drill & Hammer Rivets into Place Measure the Remaining Slot for Hydro-Test Stops Put Stops in Place & Strap Them Down Last Step: Measure and Adjust Load Flange Height if Necessary
    16. 16. Constant Spring Supports Introduction <ul><li>Used when large amounts of thermal deflections are involved (2” or more) and around sensitive rotating equipment where a load variation could be harmful. </li></ul>
    17. 17. Constant Spring Supports Horizontal <ul><li>Horizontal Constants </li></ul><ul><li>Spring can aligns horizontally </li></ul><ul><li>Permits movements vertically </li></ul>
    18. 18. Constant Spring Supports Vertical <ul><li>Vertical Constants </li></ul><ul><li>Spring can aligns vertically </li></ul><ul><li>Permits movement vertically </li></ul>Vertical Constant in the Field
    19. 19. Constant Spring Supports Upthrust <ul><li>Upthrust Constants </li></ul><ul><li>Permits vertical movement only </li></ul><ul><li>Spring can aligns vertically or horizontally </li></ul>
    20. 20. Big Ton Spring Supports <ul><li>Custom designed to meet load & travel requirements using a multiple coil system </li></ul><ul><li>Custom designed height, width and length to meet space requirements </li></ul><ul><li>Used for very large loads </li></ul><ul><li>Usually a base-mounted support that can be designed with slide plates for lateral pipe movement </li></ul>
    21. 21. Design <ul><li>Longitudinal weight stress in the piping system without creating additional stresses </li></ul><ul><li>Piping system loads on equipment without limiting or reducing static loads </li></ul><ul><li>Hanger loads on building structure </li></ul><ul><li>Physical clearances of hanger components with piping and structure </li></ul>Pipe Hangers are designed to control:
    22. 22. Basic Steps in Hanger Design <ul><li>Determine hanger locations </li></ul><ul><li>Calculate hanger loads due to piping weight </li></ul><ul><li>Calculate the thermal movement of the piping at each hanger location </li></ul><ul><li>Select hanger type </li></ul><ul><li>Check clearances </li></ul>
    23. 23. Installation Guidelines <ul><li>Securely attach the spring to the existing structure per the spring support design </li></ul>
    24. 24. Installation Guidelines <ul><li>If required, attach hanger rod to the fabricated load column/turnbuckle </li></ul>
    25. 25. Installation Guidelines <ul><li>Attach other related hardware </li></ul><ul><li>constant in the field with rod, turnbuckle, and </li></ul><ul><li>weldless eye nut  </li></ul>
    26. 26. Installation Guidelines <ul><li>After hydro-testing (if applicable), then remove travel stops </li></ul><ul><li>Variable in the field with </li></ul><ul><li>the travel stops removed  </li></ul>
    27. 27. Installation Guidelines <ul><li>Set the load indicator to the desired setting (cold/hot load) </li></ul>
    28. 28. Useful Life of a Spring Hanger <ul><li>Unprotected spring hanger </li></ul><ul><li>= 15 to 20 years </li></ul><ul><li>Galvanized hardware </li></ul><ul><li>= 15 to 30 years </li></ul><ul><li>Neoprene coated springs </li></ul><ul><li>= 15 to 30 years </li></ul>Average life expectancy of: Corrosion and fatigue are the main factors that contribute to the deterioration of the spring coil
    29. 29. Maintenance <ul><li>Leaking flanges </li></ul><ul><li>Continued pump & turbine problems related to bearings, seals and misalignment. </li></ul><ul><li>Sagging lines and liquid trapped in low sections </li></ul><ul><li>Increased system stresses resulting in potential piping failures. </li></ul>Due to inadequate support of a piping system, static loads can cause problems, such as:
    30. 30. Inspection Criteria <ul><li>Visually inspect each spring hanger in accordance with the ten point operational integrity check </li></ul><ul><li>Tag each spring hanger as good, adjust, or replace </li></ul><ul><li>Issue a field summary report </li></ul><ul><li>Ten Point Operational Integrity Check: </li></ul><ul><li>Beam attachment </li></ul><ul><li>Beam attachment pin </li></ul><ul><li>Spring hanger attachment </li></ul><ul><li>Load flange movement </li></ul><ul><li>Spring coil corrosion </li></ul><ul><li>Check load indication for hot load </li></ul><ul><li>Note load deviations </li></ul><ul><li>Turnbuckle/locknuts </li></ul><ul><li>Threaded rod/weldless eye, hex nuts </li></ul><ul><li>Pipe clamp attachment pin </li></ul>
    31. 31. Field Examples/Tips No load indicator
    32. 32. Field Examples/Tips 2 x 4 still under pipe Not Set correctly
    33. 33. Field Examples/Tips Slide plate not attached to load flange Out of adjustment Still has a travel stop
    34. 34. Field Examples Corroded cans should be replaced Cans are not supporting load
    35. 35. Replacement Criteria <ul><li>Replacement: </li></ul><ul><li>Spring hanger has no useful life remaining due to corrosion and fatigue </li></ul><ul><li>Rust damage makes it necessary to replace threaded rods, bolts, pipe attachments, etc.. </li></ul><ul><li>Equipment to be supported has been modified/changed from its original design </li></ul>
    36. 36. Re-calibration Criteria <ul><li>Re-calibration: </li></ul><ul><li>Spring hanger missing a name plate </li></ul><ul><li>Operating load range > 15,000 lb. </li></ul><ul><li>Constant spring support </li></ul><ul><li>Spring is in good operating condition </li></ul><ul><li>Cost of field time & equipment required is less than the cost of new spring hanger </li></ul>
    37. 37. Adjustments After Inspection <ul><li>Spring hangers can be set to desired position by turning the turnbuckles/load column </li></ul><ul><li>When nameplates are present indicating design hot load, adjustments can be made during operation </li></ul><ul><li>When nameplates are present indicating design cold load, adjustments can be made during shutdown (provide supported load has not changed) </li></ul>
    38. 38. Shutdown/Isolation Procedures <ul><li>Lines/equipment must have a temporary support while repairs are made </li></ul><ul><li>Re-install travel stops when the line is taken out of operation (shutdown) to prevent line/equipment movement and possible readjustment of the springs </li></ul><ul><li>If re-calibration is recommended and name plate is missing, the variable spring should be stenciled at the proper installed and operating positions or provide these loads </li></ul><ul><li>Remove spring hanger assembly </li></ul>
    39. 39. Conclusion <ul><li>Remember: When selecting springs, determine the location of the hanger, calculate the hanger load and the thermal movement of the piping at the location </li></ul><ul><li>For optimum performance, follow the installation guidelines from attaching the spring to the existing structure to setting the load indicator </li></ul><ul><li>When inspecting springs: Utilize the 10 Point Operational Integrity Check to make sure your springs are in good working order </li></ul><ul><li>* Call a PT&P field services representative if you need </li></ul><ul><li> assistance! </li></ul><ul><li>Plan now to replace damaged and/or improperly sized springs that could ultimately lead to catastrophic failure </li></ul>
    40. 40. Thank You for joining PT&P’s Engineered Pipe Support Webinar Please forward any additional questions or inquiries to us at or visit our website at