• B31J SIFs causes E801-1: FATAL ERROR

    Hello, Ever since we started using B31J I've been getting E801-1 errors when trying to run the analysis. This has happened more than once unfortunately. I've read the Q&A about E801-1 and it doesn't seem to refer to this issue, other then mentioning…
  • Siphonic PVC pipe system

    Good afternoon We are making a stress analysis on a storm siphonic system with PVC 1120, and we found this article about modeling PVC on AutoPIPE: Model Plastic Pipe in AutoPIPE - PlantFLOW Files - AutoPIPE - Bentley Communities We think the simplest…
  • B31.3 Appendix S S301

    Has anyone ever made the S301 example of B31.3 2020 appendix S in SI units? The axial force results are quite different from the results of the standard, however the horizontal displacements are correct. The examples provided by the autopipe software…
  • Fluid Transients in AutoPIPE

    Hi all, it seems the fluid transient module in AutoPIPE works by calculating the differential pressure in each pipe leg and applying the resulting force in a single direction at the point which experiences the higher pressure first. If you're manually…
  • How to design clamp support in vertical pipe?

    Hi Everyone, I have a query regarding a clamp support in vertical pipe. I am sharing a picture showing the support type. The clamp is sitting on the grating. I need expert suggestion on this kind of support. Thank you Rasel
  • B31.3 LATEST CODE COMPLIANCE (September 2019)

    It is September 2019. I understand that ASME B31.3:2018 was released some time ago? My version of Autopipe is still giving a Code compliance statement to the 2016 version of the above Code. As far as I can tell, this version of Autopipe Advanced is…
  • Modelling Branch Connection - Modified 2-Point Method

    Hi, I am using the following approach to model a branch connection and was wondering if this is appropriate. A 45 deg lateral is shown in the diagram for clarity (all segments are in the XY-plane) but I am proposing to be able to use this for any…
  • B31.3 2016 stress equations on tees are non-conservative?

    Saw this article that states the formulas for the bending stress in tee's can be non-conservative - does B31J need to used instead? Did the formulas change from 2014-2018? http://www.whatispiping.com/asme-b31-3-issue (pasted below) About Author…
  • 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…
  • How to put value"soil reaction coefficient" on soil properties?

    I'm beginner Autopipe. I am modeling underground pipeline and i wound like to input soil information but i don' know how to put "soil reaction coefficient". Additionaly,i also don't know what are k1,k2 and p1. Please let me know those problems.
  • Allowable Stress Difference in Tee Connections

    Hello, I am working on a model in v11.2 with the AUTOPIPE library, B31.3 Process Piping Code, B313-16 Material, A269-TP316L Pipe Material, & wall thickness is 2 mm. When I run the code stresses in thermal expansion, I am getting different values for…
  • B31.3 material stress allowables

    Im using AP v 11.02.00.10 for a pipe stress analysis. The analysis under consideration is a piping system designed to B31.3 2016. Im using the AUTODIN library (since I need to model EN 1092-1 flanges), and material lib B313-16. Piping material is SA312…
  • 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…
  • SIF

    "khodayar" wrote: hello, in a gas project,we are dealing with large bore pipes.in many cases the ratio of D/t is greater than 100.so the B31.3 SIFs are not valid. first I want to know if Auto pipe is a suitable software to dealing with this large bore…
  • Elevated Temperature Fluid Service & appendix V for B31.3 piping systems

    I was reviewing B31.3 para 302.2.4, which deals with the option to allow a piping system to undergo pressure and/or temperatures variations that are above the design pressure and design temperature. Most of the calculations involved need to be done by…
  • Incorporation of B31J-2017 into AutoPIPE

    Hi, when will the latest revision of B31J (the 2017 edition ) be included in AutoPIPE? As with the latest release, a 2015 draft version is included;
  • Flange Analysis Glitch?

    I am performing a flange analysis on a piping system with a large number of flanges of multiple types (lapjoint, slip-on, etc.). I have entered all the data required, run the analysis but when I go back to review the results, data I have input has changed…
  • Does AutoPIPE calculate the effective section modulus at tee junctions?

    According to B31.3 section 319.4.4.(c) in the flexibility calculations the bending stress at the branch of a tee is calculated using the effective section modulus. Does AutoPIPE automatically calculate the effective section modulus for all branches…
  • B31.3 2014 - Include axial force option

    Since ASME B31.3 2012 Edition, stresses due to axial forces have been added to both Sustained and Displacement(Thermal) stresses formula's, does checking or unchecking this option change anything in the result?
  • Extracting (or separating) steel model out of AutoPIPE V8i Select back to STAAD

    Hello all, I have a unique situation and wonder if the software has a solution. We have a linked AutoPIPE V8i Select / STAAD PRO file. Sometime after the STAAD steel model was integrated in to the AutoPIPE model, the original STAAD model was lost. Is…
  • Bend forces in Autopipe

    Dear All, I am a University student, working with Autopipe for one of our project. I was asked one question during the project review that how does Autopipe calculates the bend forces (as we do not define the velocity or flow in the pipeline) ?? …
  • Warning message (W726-10: User SIF required at junction at point )

    Dear All, I am facing the problem with branch connection, as the main run is of dia. 400mm and two branch connections are of 150mm placed in opposite direction. I tried to specify the SIF's but still m not getting rid of this warning and doesnt autopipe…
  • AutoPIPE

    Does AutoPIPE comply with the requirements of ASME B31.3 with regards to the crotch radius rx of tees, also the thickness of of the tee at the crotch radius Tc.