Piping Anchor Force due to Thermal Expansion

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SUMMARY

This discussion focuses on calculating the anchor forces due to thermal expansion in an 8" schedule 40 pipe carrying 140°F Heating Hot Water. The user, Matt, is utilizing the ASHRAE and MechE Handbook of Calculation methods but is encountering discrepancies in the force calculations. Key specifications include a 200 ft straight run and guides located 20 ft from an elbow, with the system filled with 50°F water during summer. Matt seeks assistance in identifying more accurate equations or potential errors in his calculations.

PREREQUISITES
  • Understanding of thermal expansion principles in piping systems
  • Familiarity with ASHRAE and MechE Handbook calculation methods
  • Knowledge of pipe specifications, specifically schedule 40
  • Basic structural engineering coordination for piping systems
NEXT STEPS
  • Research the thermal expansion coefficients for various pipe materials
  • Learn about the calculation of reaction forces in piping systems
  • Explore the use of software tools for piping stress analysis
  • Review the Anvil Pipe Hanger Design Engineering Catalog for design guidelines
USEFUL FOR

This discussion is beneficial for mechanical engineers, piping designers, and structural engineers involved in the design and analysis of piping systems subject to thermal expansion.

robinso5
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Hey guys,

I've got an L-bend of pipe carrying hot water that I'm trying to analyze. I've been using the ASHRAE and MechE Handbook of Calculation methods to determine the forces on the anchors due to thermal expansion, but I'm arriving at very different numbers.

Here are my specs:
An 8" schedule 40 pipe contains 140°F Heating Hot Water. The system is filled with 50°F water during the summer. Guides are located 20 ft from an elbow. The pipe has a 200 ft long straight run into one side ofthe "L Bend", which is anchored at the opposite end. Determine any reacdon forces on the guide and anchor to be coordinated with the structural engineer.

I was wondering if anyone with piping experience would be able to give me some better equations or possibly figure out where I'm going wrong.

Thanks
 
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Just follow the procedure outlined here.

http://www.anvilintl.com/DesignInfo/default.aspx

Thanks
Matt

Sorry this is the link you will want to use.

http://www.anvilintl.com/SharedContent/Pdf/Literature_Catalog/PipeHanger_DesignEngineering_Catalog.pdf

Matt
 

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