Influences on Pipe Support Design - Restraints


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Focuses on restraint devices used for transient loading, different components and functions, selecting appropriate restraint devices, and guidelines on standardization

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  • Hello everyone, I would like to welcome you to our Webinar featuring pipe clamps. The Webinar today is hosted by Piping Technology & Products. I am Jerry Godina and I will be your presenter. If you would like to join in on the audio portion of the presentation, please make sure you select speakers/headphones in the audio choice box and double check that your volume is turned up. You can also listen to us by telephone, for the United States, just dial: (1) 516-453-0014, for countries other than the US, please refer to the list of numbers in your confirmation e-mail. The access code for this presentation is 143-086-073 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.”
  • 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 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—that is on the next slide
  • ASME Code B31.3 Clause 321.1.1
  • 3D Model of Multiple Pipe Support Configurations
  • Thank You for Joining Our Webinar on Expansion Joints… We are open to take your questions; however, if you have any additional questions or inquiries, you can send us an email at
  • Influences on Pipe Support Design - Restraints

    1. 1. Webinar SeriesOverview of How Piping Design & Analysis InfluencesPipe Support Selection & Design Influences on Pipe Support Design Restraints Webinar Session # 8 August 29, 2012 By Piping Technology & Products
    2. 2. Je rry G odina L ead Pipe Support DesignerIf you have any questions, comments orsuggestions, please email us atenews@pipingtech.comTo request a PDH certificate, email
    3. 3. PT&P Structure PIPING TECHNOLOGY & PRODUCTS, INC. • Engineered Pipe Supports • Variables, 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 ISO 9001:2008 Certified ICBO Certified, Member of MSS, SPED, APFAU.S. Bellows, INC. SWECO FAB, INC. Pipe Shields, INC. Fronek A/D E.• Metallic Expansion Joints • Insulated Pipe Support • Hydraulic Snubbers • Pressure Vessels• Thin-wall, Thick-wall • Commercial & Light  Short strut • Pig Launchers & industrial• Fabric Expansion Joints Receivers Adjustable strut • Heavy Industrial -• Rectangular Expansion • Spectacle/Line Blinds based on Mounted, • Mechanical SnubbersJoints • Instrument Supports Anchors • DynA/Damp• Slip-type • Pipe Riser Clamps Compensating Strut • ASME/Misc. FabricationMember of EJMA ASME U-Stamp ASME Nuclear Qualified
    4. 4. Webinar Series: Overview of How Piping Design & AnalysisInfluences Pipe Support Selection & DesignTopic Session / DateIntroduction I. Overview of Piping (completed)Preliminary I. Piping System II. The Total SystemPiping Design Components (completed) (completed)Basic Concepts I. Flexibility Analysis II. Design Basesof Stress (completed) (completed)AnalysisInfluences on I. Rigid Supports II. Spring Supports III. RestraintsPipe Support (completed) (completed) August 29, 2012Design
    5. 5. Introduction Why Pipe Supports ?  Support piping system loads  Restrain or guide our piping system elements  Permit movement of our piping system  Transmit pipe loads to structural members  Prevent heat transfer to the surrounding structure
    6. 6. Introduction Key Pipe Support Requirements All pipe supports should be designed to:  Limit piping stresses to acceptable Code standards  Prevent leakage at pipe joints  Limit excessive thrusts and moments on connected equipment  Limit excessive stresses in supporting or restraining elements  Eliminate resonance with imposed or fluid-induced vibrations  Eliminate interference with thermal expansion and contraction in the piping system  Maintain engagement during all phases of operation  Reduce excessive piping sag in piping requiring drainage slope  Minimize excessive distortion or sag of piping subject to creep under conditions of repeated thermal cycling  Limit excessive heat flow, exposing supporting elements to temperature extremes outside their design limits
    7. 7. Introduction Other Pipe Support Standards  ASME B31.1 Power Piping  ASME B31.3 Process Piping  MSS SP-58 Pipe Hangers and Supports – Materials, Design, and Manufacture  MSS SP-69 ANSI/MSS Edition Pipe Hangers and Supports  MSS SP-77 Guidelines for Pipe Support Contractual Relationships  MSS SP-89 Pipe Hangers and Supports – Fabrication and Installation Practices  MSS SP-90 Guidelines on Terminology for Pipe Hangers and Supports
    8. 8. Introduction Major factors which impact the overall design and cost of supports include:  Operating Conditions  Loads  Movements  Temperatures  Standard vs. Custom  Material  Dimensions / Sizing  Adjustability  Built-in  As added feature
    9. 9. Introduction Designers Pipe Support Integration Designers Designers Structural PipingEffective coordination between designers of multipledisciplines is necessary during the planning stages. Flow Chart Product of that coordination will be seen during erection and subsequently throughout the plant operation.
    10. 10. General Support Styles Typical Design Parameters DeflectionSpace Requirements Restraint Force Attachment Point
    11. 11. General Support Styles Snubber Types  Mechanical  Hydraulic Rigid Strut
    12. 12. Support Styles & FunctionsGuidelines to Consider:  Primary support function  Support location  Dependent upon existing steel / foundation  Location of critical equipment (valves, fittings, instrumentation)  Available pipe attachment points (straight-run preferred)  Necessity for supplementary function  Ability to utilize supports during inspections, maintenance and shut-downs  Need for adjustability
    13. 13. Support Styles & Functions General Restraints – Snubbers Characteristics • Passive element that permits pipe deflection under normal operating conditions • Allows movement in tension and compression • Activated during unwarranted dynamic events • Acts as a restraint device when activated • Load rating references maximum restraint force when activated • Can utilize hydraulic or mechanical means to generate restraint loads
    14. 14. Support Design Influences Snubbers – Load 140,700 lb. Load Hydraulic Snubbers 225,000 lb. Hydraulic Snubber Load CapacityDeveloped by Diameter of Main Cylinder
    15. 15. Support Design Influences Snubbers – Movement Design Deflection Minimum Stroke Specified Must Accommodate Design Deflection
    16. 16. Support Design Influences Snubbers – Available Attachment Points
    17. 17. Support Design Influences Snubbers – Space Constraints / Adjustability Adjustability Obtained via Threaded Load Column C-C Established in Design Specifications
    18. 18. Support Styles & Functions General Restraints – Sway Struts Characteristics • Designed to accommodate limited deflection in two directions • Produces restraint force in either compression or tension mode • Different sizes available to accommodate load ranges • Restraint load must act along the pin-to-pin access of the strut
    19. 19. Support Design Influences Sway Struts – Load Various Sized Sway Struts
    20. 20. Support Design Influences Sway Struts – Available Attachment Points
    21. 21. Support Design Influences Sway Struts – MovementMaximum 5 Degree Lateral Deflection Axial Deflection
    22. 22. Support Design Influences Sway Struts – Space Constraints / Adjustability C-C Established in Design Specifications Adjustability Obtained via L/H-R/H Threaded Extension Pipe
    23. 23. Support Design Influences Sway Struts – Material3-Layer Paint Application Stainless Steel Structural Attachments for a High Temperature Application
    24. 24. Support Styles & Functions General Auxiliary Steel Characteristics • Provides attachment location • Primarily attached to existing structural members or foundation elements • Comprised of structural steel shapes (W-beams, channels, angles, etc.)
    25. 25. Overall Pipe Support Assembly Guidelines 1. Use Standard Supports if Possible 2. Provide Minimum Field Fabrication 3. Utilize Adjustability to Accommodate Site Conditions 4. Incorporate Maintenance or Accessibility After Installation
    26. 26. Support Styles & Functions Major Support Categories Rigid Supports Spring Supports Restraints Auxiliary Steel • Anchors • Variables • Hydraulic Snubbers • Cantilever • Guides • Constants • Mechanical Snubbers • Braces • Load Bearing • Sway Braces • Sway Struts • Frames
    27. 27. Overall Pipe Support Assembly Guidelines Develop Standardized Supports Customer Drawing Completed Pipe SupportsDetailed PT&P Fabrication Drawing
    28. 28. Overall Pipe Support Assembly Guidelines Provide Minimum Field Fabrication Field Weld Locations Structural Beam Fabricated Along with Variables
    29. 29. Overall Pipe Support Assembly Guidelines Provide Minimum Field Fabrication Structural Pedestal Fabricated Along with Clamp
    30. 30. Overall Pipe Support Assembly Guidelines Provide Minimum Field Fabrication 1520 PTP-2 and PTP-4 Variable Spring and Riser Clamp Assemblies for a Furnace Application
    31. 31. Overall Pipe Support Assembly Guidelines Adjustability to Accommodate Site ConditionsCritical Elevation Established via Built-in Adjustability of Variable Spring Assemblies
    32. 32. Overall Pipe Support Assembly Guidelines Incorporate Maintenance or Accessibility After Installation
    33. 33. End of Webinar SeriesThank you for joining our Webinar Series, Overview of HowPiping Design & Analysis Influences Pipe Support Selection &Design.If you missed any sessions and would like to view the recording,please visit you have any questions, comments or suggestions, or would like torequest your PDH certificate, please email us