Wiki Page: 01. How to calculate the allowable expansion stress for ASME B31.4 Ed. 2012 in AutoPIPE?

Applies To Product(s): AutoPIPE Version(s): 2004, XM, V8i Environment: N/A Area: Calculations Subarea: Original Author: Bentley Technical Support Group Date Logged & Current Version Aug. 2015 09.06.02.06 Problem: How to calculate the allowable expansion stress for ASME B31.4 Ed. 2012 in AutoPIPE? Answer: For B31.4 (2009 and higher) AutoPIPE does calculate the unrestrained expansion allowable as per clause 403.3.2 explained below for AutoPIPE: SA=f[1.25(Sc+Sh)- SL] Where: SA = Allowable expansion stress f = Fatigue factor (defined as "Range reduction factor" on Result Model Options dialog) Sc = 2/3 * Sy (Sy is the minimum yield defined on Pipe Properties dialog) Sh = 2/3 * Syt (Syt is the yield value at each temperature case, updated on pressure and temperature dialog) SL = Sustained stress for unrestrained lines 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!