![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 Attention Attendees : to listen to the audio portion, check that your speakers or headset are on and turned up OR dial the number and use the access code listed in your confirmation email. Attention P.E.’s : this Webinar is worth 1 PDH credit for TX P.E.’s (send request to [email_address] )](https://image.slidesharecdn.com/ptpconstants1-21-2010-110429081520-phpapp01/75/Constant-Spring-Supports-Webinar-1-2048.jpg)
![Thank You for Attending… PT&P Webinar: Constant Spring Supports Please send any additional questions or inquiries to [email_address] Useful Links: Online Quote: www.pipingtech.com/quote Online Catalog: www.pipingtech.com/catalog Technical Webinars: www.pipingtech.com/webinar Blog: www.pipesupportsblog.com](https://image.slidesharecdn.com/ptpconstants1-21-2010-110429081520-phpapp01/75/Constant-Spring-Supports-Webinar-46-2048.jpg)
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Constant Spring Supports Webinar
- 1. 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 Attention Attendees : to listen to the audio portion, check that your speakers or headset are on and turned up OR dial the number and use the access code listed in your confirmation email. Attention P.E.’s : this Webinar is worth 1 PDH credit for TX P.E.’s (send request to [email_address] )
- 2. PT&P and SubsidiariesU.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
- 3. Spring Hanger DesignCalculate 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
- 4. Constant Characteristics 1.)Large thermal movements, with standard designs up to 14" and custom designs 36" or greater 2.) No difference in the supported load from the installed to the operating condition
- 5. Maximum Variation: 6%Available Load Adjustment: +/- 10% Supported Load Always Remains Steady Constant Spring Supports Working Principle
- 6. Constant Design ParametersConfiguration PTP-100 (Vertical) PTP-200 (Horizontal) Size 1-100+ Type PTP-100 Types: A, B, C, D, E, F, G, U PTP-200 Types: A, B, C, D, E, F, U
- 7.
- 8. Constant Configuration PTP-100Constant PTP-200 Constant PTP-100 vs. PTP-200 Vertical orientation Compact design Less rotation inertia Horizontal orientation Easier placement & adjustment High degree of flexibility
- 9. Spring Size &Load Capacity Height O.D. Wire Dia. Pitch
- 10. Frame Size &Load Capacity The cam/coil combination determines the load carrying capability.
- 11. 100-A 200-A PTP-100vs. PTP-200 Type A
- 12. 100-B 200-B PTP-100vs. PTP-200 Type B
- 13. 100-C 200-C PTP-100vs. PTP-200 Type C
- 14. 100-D 200-D PTP-100vs. PTP-200 Type D
- 15. 100-E 200-E PTP-100vs. PTP-200 Type E
- 16. 100-F (Layout A)200-F 100-F (Layout B) PTP-100 vs. PTP-200 Type F
- 17. 100-U 200-U PTP-100 vs. PTP-200 Type U
- 18. 100-G PTP-100 vs.PTP-200 Type G
- 19. Given the FollowingDesign Parameters: a.) Operating Load: 3000 lb. b.) Actual Travel: 4 ⅜“ up Step 1: Determine Total Travel: Rounded up to nearest ½" a.) When Actual Travel is < 5" Total Travel = Actual Travel + 1" b.) When Actual Travel is ≥ 5" Total Travel = Actual Travel + 20% Rounded up to nearest ½" Example: Total Travel = 4 ⅜" + 1" = 5 ⅜" 5 ½" Constant Spring Supports Spring Sizing
- 20. Step 2: ReviewLoad and Travel Table Chart Final Answer: Size 41 Constant Spring Supports Spring Sizing
- 21.
- 22. Test Procedure: ConstantEffort Hangers Constant fitted to press Installation Position Travel Stop Removal
- 23. Test Procedure: ConstantEffort Hangers Stage #1 Installed Position Midpoint of Travel Operating Position
- 24. Test Procedure: ConstantEffort Hangers Stage #5 Ascending Midpoint Ascending Installed
- 25. Test Procedure: ConstantEffort Hangers Load Adjustment Tagging
- 26. Load Flange LoadTag: Both Hot (red) and Cold (white) Movement Installation Instructions Travel Stops Hot-Dipped Galvanized Adjustable Load Column (F-Can) Pre-Loaded +/- 10% Load Adjustment Constant Spring Supports Standard Features
- 27. Attachments Travel Stops“ Big Ton” Custom Constants Coating & Mobility
- 28. Installation - Constants Structural Attachment
- 29. Installation - ConstantsInstallation of Assembly Components
- 30. Installation - ConstantsRemove or Disengage Travel Stops
- 31. Installation - ConstantsAdjustment: Load change is less than +/- 10%
- 32. Average life expectancyof: 10 years 20 years 30 years Unprotected Spring Hanger Galvanized Hardware Neoprene Coated Springs Useful Life of a Spring Hanger Maintenance – Life Expectancy
- 33. Leaking flanges Continuedpump & turbine problems related to bearings, seals and misalignment. Sagging lines and liquid trapped in low sections Increased system stresses resulting in potential piping failures. Due to inadequate support of a piping system, static loads can cause problems, such as: Maintenance Static Loads
- 34. Visually inspect eachConstant hanger: Search for signs of visual cracks, fractures, and corrosion of the spring casing and the following: (1) beam attachment (2) pin (3) constant hanger attachment (4) pipe clamp attachment (5) weldless eye nut (6) threaded rod (9) spring coil (10) Check to see if Travel Stops are removed Check (7) turnbuckle (if present), lock nuts (8) and other threaded items to ensure they are secured and fastened Compare the position of the (10) coil with the hot/cold load indicator and operating range of the spring Check the mobility of the (11) load column Before and After Picture of Constant Load Support that Was Resized Maintenance - Inspection
- 35. Re-calibration : Springhanger missing a name plate Operating load range > 15,000 lb. Spring is in good operating condition Cost of field time & equipment required is less than the cost of new spring hanger Re-calibration Criteria
- 36. Maintenance Regulation CriteriaIf within total travel range The hanger can be adjusted to the hot/operating load position Consider the position of rod (swing angle also) Consider adjustment of load (+/- 10%)
- 37. On-Site Survey &Inspection – Constant Spring Replacement Criteria: Signs of excessive corrosion or fatigue Rust damage of entire unit Modifications to operating conditions Consider condition of components (cam mechanisms, bearings, etc.)
- 38. Field Examples Maintenance- Replace
- 39. Lines/equipment must havea temporary support while repairs are made Re-install travel stops when the line is taken out of operation (shutdown) to prevent line/equipment movement and possible readjustment of the springs 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 Remove spring hanger assembly Shutdown/Isolation Procedures
- 40. Value-Added Services Piping,pipe support and structural design 3D modeling technology Pipe Stress Analysis ANSYS Finite Element Analysis Special stress/thermal problems Pro/E for 3-D Part Design ANSYS for Mesh Generation + Analysis + Results Analysis Field Testing Engineering & Design Department
- 41. Value-Added Services On-siteinstallation guidance On-site inspection/maintenance of pipe supports On-site snubber inspection A system of stock standard Items “ On-call” engineering team Available 24x7 PT&P’s “On-call” engineering team guarantees a response time of 30 minutes Field Services & Emergency Services
- 42. Friday, 5:30pm SaturdaySunday Value-Added Services 24x7 Emergency Service for a 48" Expansion Joint
- 43. Cold Shoe TestingConstant Testing Marinite Slide Plate Testing Spring Load Testing Anchor Shoe Testing Value-Added Services Product Testing
- 44. > 30,000 springcoils > 1 million Lb. of standard items Full year supply of beam, angle, plates, rods…etc. At Piping Technology & Products, we stock: Value-Added Services Inventory & Stocking Capabilities
- 45. www.pipingtech.com Fatigue TestingPressure Balanced Expansion Joints FEA: Plate Thickness and Pipe Stress Inspection and Maintenance of Supports “ Over 450 Project Examples” Value-Added Services Technical Literature Online
- 46. Thank You forAttending… PT&P Webinar: Constant Spring Supports Please send any additional questions or inquiries to [email_address] Useful Links: Online Quote: www.pipingtech.com/quote Online Catalog: www.pipingtech.com/catalog Technical Webinars: www.pipingtech.com/webinar Blog: www.pipesupportsblog.com
Editor's Notes
- #2 Hello everyone, I would like to welcome you to our Webinar on Constant Spring Supports. The Webinar today is hosted by Piping Technology & Products. I am __________________________ and I will be your presenter. Optional: Your normal presenter, Jerry Godina is on a field service call and could not make it today to present, so I will be standing in for him. Also, if you have a question, please feel free to chat it to us during the presentation in the text box you see to the right of the presentation or if you prefer, you can ask questions after the presentation during our “Questions and Answers Session.”
- #3 For those of you who are unfamiliar with PT&P, I want to quickly go over some background information. If you would like to know more, please visit our “About Us” section at pipingtech.com. Our parent company, Piping Technology & Products, Inc., also known as PT&P, is a member of MSS, SPED, and APFA In business since 1975, Piping Technology & Products, Inc. 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.
- #4 Pipe Hangers are designed to control: Longitudinal weight stress in the piping system without creating additional stresses Piping system loads on equipment without limiting or reducing static loads Hanger loads on building structure And physical clearances of hanger components with piping and structure Let’s look at the basic steps in the hanger design: Step 1 is to determine the location of all the hangers Then calculate the hanger loads due to the piping weight Next calculate the thermal movement of the piping at each hangers location Step 4 is to select the hanger type and finally check all clearances
- #6 Constant hangers are principally used to support pipes and equipment subjected to vertical movement due to thermal expansion at locations where transfer to stress and other supports or equipment can be critical. The maximum recommended variation according to MSS standard from the operating load is 25% for variable spring hangers. If the variation exceeds 25%, a constant support hanger should be used. The constant resistance to a load is achieved by combining a spring coil with a cam which rotates about a main pivot point. The cam is designed such that the distances from the main pivot changes to compensate for the variable resistance during compression of the coil. The MSS standard provides for a tolerance of 6% in the constant load through the travel range. Our constant support hangers are designed per MSS, ANSI, and ASME standards.
- #7 3 major design parameters Size – function of both travel & load Configuration Type – explains physical orientation, attachment, and position
- #20 Example: Given the Following Design Parameters: a.) Operating Load: 3000 b.) Actual Travel: 4 ⅜&quot; Step 1: Determine Total Travel: a.) When Actual Travel is < 5&quot; Total Travel = Actual Travel + 1&quot; Rounded up to nearest ½&quot; Total Travel = 4 ⅜&quot; + 1&quot; = 5 ⅜&quot; 5 ½&quot; (EXAMPLE) b.) When Actual Travel is ≥ 5&quot; Total Travel = Actual Travel + 20% Rounded up to nearest ½&quot;
- #21 Step 2: Review Load and Travel Table Chart Final Answer: Size 41
- #27 Special Features can be provided if required: --lifting lugs can be helpful for installing large hangers --Upper and lower limit stops --Collars --Special Paint --Guided load columns --Extended load columns --Chained travel stops --Jacking Bolts --Type F PTFE, 25% glass filled
- #29 Attachment to structures / travel stops
- #31 Travel Stops
- #32 Back of a Can, Horizontal with Rod and Hex nuts Coil Adjustment
- #33 Let’s look at the average life expectancy of a spring hanger: An unprotected spring hanger will last anywhere between fifteen (15) and twenty (20) years. If the hardware is galvanized, which is PT&P’s standard, the spring hanger will last between fifteen (15) and thirty (30) years. And if the springs are coated with Neoprene, it will last fifteen (15) to thirty (30) years. Corrosion and fatigue are the main factors that contribute to the deterioration of a spring hanger assembly.
- #34 If the piping system has inadequate support, static loads can cause multiple problems, like: Leaking flanges Pump and turbine problems, mainly concerning the bearings, seals and misalignment of flanges Sagging lines and/or liquid trapped in low sections And an increase in system stresses can result in piping failures as well
- #36 In the case you want to use your existing spring support, re-calibration is an option as long as the support is a constant spring support, in good operating condition, has an operating load range greater than fifteen thousand (15,000) pounds and the cost of field time and equipment is less than the cost of a new spring hanger.
- #38 LEFT PIC: Constant Support in Jamaica-Travel Pin is Rusted and Decayed
- #40 A few thoughts during shutdown: Are the lines and equipment temporarily supported while repairs are being made? To prevent having to readjust the spring, I need to re-install the travel stops. If the name plate is missing, stencil the proper installed and operating positions or provide loads for re-calibration.
- #43 Remove this slide… does not flow when talking about services and then stopping and switching to an example
- #46 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.
- #47 That concludes our Webinar on Constant Spring Supports…. I hope everyone enjoyed the presentation and as a reminder, we have a staff of experts 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