Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Problem: I understand the value for the allowable displacement stress range within ASME b31.3 to be sa = f(1.25sc + 0.25sh). if my piping has the same high temperature 640c everywhere, and the same ambient temperature 20c everywhere, why is the computed allowable displacement stress range (allowable expansion stress value) different along the pipe? Answer: There are 2 things that would control the displacement stress allowable: A. Tools> Model Options> Results> Sustain Margin (Y/N/E) note: See AutoPIPE online help for information on this feature. OR B. Different material properties - confirm same material properties are being used for piping to have the same allowable calculation. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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