• Pipe stress and axial force

    Hello everyone, I have two questions about pipe stress and axial force in the model after interpretation the results from model. I've attached the file to this post. Why is the force at A41 to A06 in the model the same? Should it be…
  • Hoop stress

    Hello, I have some questions regarding the hoop stress calculation by AutoPIPE. I've tried to calculate the hoop stress myself compared to AutoPIPE Result. The result will be shown below. The hoop stress is 33.16 MPa according to ASME B31.4 code…
  • AutoPIPE Flange Check - ASME III Appendix XI - Code Edition

    I'm calculating a piping system with ASME III ND, 2017 Edition. However, when I run the Flange Check analysis using ASME III App. XI, it uses the 2010 edition. Can I choose which edition is used?
  • How to model branch connection with ASME B31J.

    Hi, when using B31J, I am confusing about modeling branch, for flexibility, B31J provide three method to modeling, which are show on figure C-2-3, Figure C-2-4 and Figure C-2-5. So my question is which method is used in Autopipe? And can the branch…
  • Fitting dimensions to use with ASME B31J?

    I'm looking for at least nominal values for welding tee crotch thickness and crotch radius, along with reducer alpha angle and flat length for use in calculating SIF's per ASME B31J. Does anyone have a reference that provides these values? I'm looking…
  • Cumulative Damage

    How may the cumulative fatigue damage at each point in a piping system be calculated using AutoPIPE and B31.3 Equation 1d?
  • Allowable stesses on NS materials

    "Karl Johan Watne" wrote: Since SuperDuplex ASTM A790 Grade S32750 is not part of the material library AUTOB313, I have added this as a NS material and entered the material properties. For some reason AutoPIPE reports different allowable stresses for…
  • S_h with two Temp Conditions

    "Steven Perry" wrote: I have noticed that AutoPIPE will apply to all occasional cases the lower strength/higher temperature S_h from B31.3 when two temperature cases are defined even when the occasional cases use the lower temperature as the base case…
  • RE: ASME 31E seismic load calculations

    Fergus, Kevin, Some very good comments and a nice procedure from Fergus. I would generally agree with the procedure which Fergus detailed, and which also helped me figure out a couple of mistakes I was making. I have tried to come up with a visual representation…