Applies To Product(s): AutoPIPE Version(s): 2004, XM, V8i Environment: N/A Area: Results Subarea: Original Author: Bentley Technical Support Group Date Logged & Current Version Aug. 2015 09.06.02.06 Problem: What is the reasoning for taking only gravity and thermal expansion bending moments into account for Equiv2 and not pressure? If you have thermal expansion you have pressure as well. You can't just have thermal expansion without pressure. In your competitor's program they are taking bending moments from all cases into account (pressure, gravity and thermal). Answer: Pressure cases contain pressure extension/elongation forces and moments, which piping codes do not clearly require to be included in calculations. Longitudinal Pressure Stress component (P*Ap/As) is always included regardless of Pressure case being a part of the combination or not. Note: As = Cross sectional area of pipe, in2 Ap = Pressure area of pipe, in2 P = Design internal pressure, psi 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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