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Constant Spring Supports Installation & Applications


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Learn about the special features available, in addition to the design of a constant support. View how the different cam/coil configurations produce a unique response to an applied load. Discover the step by step process used to size a spring for your application. Learn about the different attachments, testing, and installation and maintenance procedures. View examples of failed supports provided by our Field Service Division and learn why they failed and how to prevent it. Gain knowledge of the valuable tips used when deciding to adjust or replace a constant spring support, as well as shutdown and isolation procedures.

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Constant Spring Supports Installation & Applications

  1. 1. Attention all Attendees… <ul><li>Welcome! </li></ul><ul><ul><li>To listen to the audio portion: 1.) Make sure your speakers or headset are on and turned up. </li></ul></ul><ul><ul><li>OR </li></ul></ul><ul><ul><li>2.) Dial the phone number listed in your confirmation e-mail: </li></ul></ul><ul><ul><li>Thank you for attending. We will be starting shortly. </li></ul></ul><ul><li>10:00 am Time Slot </li></ul><ul><li>U.S. #: (1) 516-453-0014 </li></ul><ul><li>Access Code: 625-532-412 </li></ul><ul><li>2:00 pm Time Slot </li></ul><ul><li>U.S. #: (1) 323-417-4600 </li></ul><ul><li>Access Code: 334-292-855 </li></ul>* If you are located outside the U.S., please refer to your confirmation e-mail for a list of phone numbers to call for your area.
  2. 2. Piping Technology & Products, Inc. Constant Spring Supports Webinar and wholly owned subsidiaries: US Bellows Sweco Fab Pipe Shields Anchor/Darling Ent. Presents: Constant Spring Supports Webinar
  3. 3. PT&P and Subsidiaries U.S. Bellows, Inc.  Metallic Expansion Joints  Thin-Wall and Thick-Wall  Rectangular Expansion Joints  Fabric Expansion Joints  Slip-Type Expansion Joints PIPING TECHNOLOGY & PRODUCTS, INC. - Engineered Pipe Supports - Variable, Constants, Big-tons - Vibration Control Devices – Snubbers, Sway Struts - Support Assembly Components – Clamps, misc. Hardware - Pre-insulated Pipe Supports – Cryogenic/cold & Hot Applications - Fabricated Pipe Shoes, Guides & Anchors - Slide Bearing Plates - Anchor Bolts, Embed Plates IAS Certified, Member of MSS, SPED, APFA Member of EJMA SWECO Fab, Inc.  Pressure Vessels  Pig Launchers/Receivers  Spectacle/Line Blinds  Instrument Supports  ASME/Misc. Fabrication ASME U-Stamp & R-Stamp Pipe Shields, Inc. Insulated Pipe Supports  Commercial & Light Industrial  Heavy Industrial – Base Mounted Types, Anchors  Pipe Riser Clamps ISO 9001-2000 Certified Fronek A/D Ent., Inc.  Hydraulic Snubbers - Short & Adjustable Strut  Mechanical Snubbers  dynA/Damp Compensating Strut ASME Nuclear Certified
  4. 4. Spring Hanger Design Calculate hanger loads due to piping weight Calculate thermal movement of piping at each hanger location Determine hanger locations Select hanger type Check clearances 1 2 3 4 5  Basic Steps in Design
  5. 5. Constant Characteristics 1.) Large thermal movements, with standard designs up to 14&quot; and custom designs 36&quot; or greater 2.) No difference in the supported load from the installed to the operating condition
  6. 6. <ul><li>Maximum Variation: 6% </li></ul><ul><li>Available Load Adjustment: +/- 10% </li></ul><ul><li>Supported Load Always Remains Steady </li></ul>Constant Spring Supports Working Principle
  7. 7. Constant Design Parameters <ul><li>Configuration </li></ul><ul><ul><li>PTP-100 (Vertical) </li></ul></ul><ul><ul><li>PTP-200 (Horizontal) </li></ul></ul><ul><li>Size </li></ul><ul><ul><li>1-100+ </li></ul></ul><ul><li>Type </li></ul><ul><ul><li>PTP-100 </li></ul></ul><ul><ul><ul><li>Types: A, B, C, D, E, F, G, U </li></ul></ul></ul><ul><ul><li>PTP-200 </li></ul></ul><ul><ul><ul><li>Types: A, B, C, D, E, F, U </li></ul></ul></ul>
  8. 8. Constant Information Sheet
  9. 9. Constant Configuration PTP-100 Constant PTP-200 Constant PTP-100 vs. PTP-200 <ul><li>Vertical orientation </li></ul><ul><li>Compact design </li></ul><ul><li>Less rotation inertia </li></ul><ul><li>Horizontal orientation </li></ul><ul><li>Easier placement & adjustment </li></ul><ul><li>High degree of flexibility </li></ul>
  10. 10. Spring Size & Load Capacity Height O.D. Wire Dia. Pitch
  11. 11. Frame Size & Load Capacity The cam/coil combination determines the load carrying capability.
  12. 12. 100-A 200-A PTP-100 vs. PTP-200 Type A
  13. 13. 100-B 200-B PTP-100 vs. PTP-200 Type B
  14. 14. 100-C 200-C PTP-100 vs. PTP-200 Type C
  15. 15. 100-D 200-D PTP-100 vs. PTP-200 Type D
  16. 16. 100-E 200-E PTP-100 vs. PTP-200 Type E
  17. 17. 100-F (Layout A) 200-F 100-F (Layout B) PTP-100 vs. PTP-200 Type F
  18. 18. 100-U 200-U PTP-100 vs. PTP-200 Type U
  19. 19. 100-G PTP-100 vs. PTP-200 Type G
  20. 20. Given the Following Design Parameters: a.) Operating Load: 3000 lb. b.) Actual Travel: 4 ⅜“ up Step 1: Determine Total Travel: Rounded up to nearest ½&quot; a.) When Actual Travel is < 5&quot; Total Travel = Actual Travel + 1&quot; b.) When Actual Travel is ≥ 5&quot; Total Travel = Actual Travel + 20% Rounded up to nearest ½&quot; Example: Total Travel = 4 ⅜&quot; + 1&quot; = 5 ⅜&quot; 5 ½&quot; Constant Spring Supports Spring Sizing
  21. 21. Step 2: Review Load and Travel Table Chart Final Answer: Size 41 Constant Spring Supports Spring Sizing
  22. 22. Constant Information Sheet
  23. 23. Test Procedure: Constant Effort Hangers Constant fitted to press Installation Position Travel Stop Removal
  24. 24. Test Procedure: Constant Effort Hangers Stage #1 Installed Position Midpoint of Travel Operating Position
  25. 25. Test Procedure: Constant Effort Hangers Stage #5 Ascending Midpoint Ascending Installed
  26. 26. Test Procedure: Constant Effort Hangers Load Adjustment Tagging
  27. 27. <ul><li>Load Flange </li></ul><ul><li>Load Tag: Both Hot (red) and Cold (white) Movement </li></ul><ul><li>Installation Instructions </li></ul><ul><li>Travel Stops </li></ul><ul><li>Hot-Dipped Galvanized </li></ul><ul><li>Adjustable Load Column (F-Can) </li></ul><ul><li>Pre-Loaded </li></ul><ul><li>+/- 10% Load Adjustment </li></ul>Constant Spring Supports Standard Features
  28. 28. Attachments Travel Stops “ Big Ton” Custom Constants Coating & Mobility
  29. 29. Installation - Constants Structural Attachment
  30. 30. Installation - Constants Installation of Assembly Components
  31. 31. Installation - Constants Remove or Disengage Travel Stops
  32. 32. Installation - Constants Adjustment: Load change is less than +/- 10%
  33. 33. Average life expectancy of: 10 years 20 years 30 years Unprotected Spring Hanger Galvanized Hardware Neoprene Coated Springs Useful Life of a Spring Hanger Maintenance – Life Expectancy
  34. 34. <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: Maintenance Static Loads
  35. 35. <ul><li>Visually inspect each Constant hanger: </li></ul><ul><ul><li>Search for signs of visual cracks, fractures, and corrosion of the spring casing and the following: </li></ul></ul><ul><ul><ul><li>(1) beam attachment </li></ul></ul></ul><ul><ul><ul><li>(2) pin </li></ul></ul></ul><ul><ul><ul><li>(3) constant hanger attachment </li></ul></ul></ul><ul><ul><ul><li>(4) pipe clamp attachment </li></ul></ul></ul><ul><ul><ul><li>(5) weldless eye nut </li></ul></ul></ul><ul><ul><ul><li>(6) threaded rod </li></ul></ul></ul><ul><ul><ul><li>(9) spring coil </li></ul></ul></ul><ul><ul><ul><li>(10) Check to see if Travel Stops are removed </li></ul></ul></ul><ul><ul><li>Check (7) turnbuckle (if present), lock nuts (8) and other threaded items to ensure they are secured and fastened </li></ul></ul><ul><ul><li>Compare the position of the (10) coil with the hot/cold load indicator and operating range of the spring </li></ul></ul><ul><ul><li>Check the mobility of the (11) load column </li></ul></ul>Before and After Picture of Constant Load Support that Was Resized Maintenance - Inspection
  36. 36. <ul><li>Re-calibration : </li></ul><ul><ul><li>Spring hanger missing a name plate </li></ul></ul><ul><ul><li>Operating load range > 15,000 lb. </li></ul></ul><ul><ul><li>Spring is in good operating condition </li></ul></ul><ul><ul><li>Cost of field time & equipment required is less than the cost of new spring hanger </li></ul></ul>Re-calibration Criteria
  37. 37. Maintenance <ul><li>Regulation Criteria </li></ul><ul><ul><li>If within total travel range </li></ul></ul><ul><ul><li>The hanger can be adjusted to the hot/operating load position </li></ul></ul><ul><ul><li>Consider the position of rod (swing angle also) </li></ul></ul><ul><ul><li>Consider adjustment of load (+/- 10%) </li></ul></ul>
  38. 38. On-Site Survey & Inspection – Constant Spring <ul><li>Replacement Criteria: </li></ul><ul><ul><li>Signs of excessive corrosion or fatigue </li></ul></ul><ul><ul><li>Rust damage of entire unit </li></ul></ul><ul><ul><li>Modifications to operating conditions </li></ul></ul><ul><ul><li>Consider condition of components (cam mechanisms, bearings, etc.) </li></ul></ul>
  39. 39. <ul><li>Field Examples </li></ul>Maintenance - Replace
  40. 40. <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>Shutdown/Isolation Procedures
  41. 41. Value-Added Services <ul><ul><li>Piping, pipe support and structural design </li></ul></ul><ul><ul><li>3D modeling technology </li></ul></ul><ul><ul><li>Pipe Stress Analysis </li></ul></ul><ul><ul><ul><li>ANSYS </li></ul></ul></ul><ul><ul><li>Finite Element Analysis </li></ul></ul><ul><ul><ul><li>Special stress/thermal problems </li></ul></ul></ul><ul><ul><ul><li>Pro/E for 3-D Part Design </li></ul></ul></ul><ul><ul><ul><li>ANSYS for Mesh Generation + Analysis + Results Analysis </li></ul></ul></ul><ul><ul><li>Field Testing </li></ul></ul> Engineering & Design Department
  42. 42. Value-Added Services <ul><li>On-site installation guidance </li></ul><ul><li>On-site inspection/maintenance of pipe supports </li></ul><ul><li>On-site snubber inspection </li></ul><ul><li>A system of stock standard Items </li></ul><ul><li>“ On-call” engineering team </li></ul><ul><li>Available 24x7 </li></ul>PT&P’s “On-call” engineering team guarantees a response time of 30 minutes  Field Services & Emergency Services
  43. 43. Friday, 5:30pm Saturday Sunday Value-Added Services 24x7 Emergency Service for a 48&quot; Expansion Joint
  44. 44. Cold Shoe Testing Constant Testing Marinite Slide Plate Testing Spring Load Testing Anchor Shoe Testing Value-Added Services Product Testing
  45. 45. <ul><li>> 30,000 spring coils </li></ul><ul><li>> 1 million Lb. of standard items </li></ul><ul><li>Full year supply of beam, angle, plates, rods…etc. </li></ul>At Piping Technology & Products, we stock: Value-Added Services Inventory & Stocking Capabilities
  46. 46. Fatigue Testing Pressure Balanced Expansion Joints FEA: Plate Thickness and Pipe Stress Inspection and Maintenance of Supports “ Over 450 Project Examples” Value-Added Services Technical Literature Online
  47. 47. PT&P Webinar: Constant Supports Thank You for Attending… Please send any additional questions or inquiries to: [email_address] We invite you to visit our Discussion Forum and follow us on Twitter at