• Autopipe Code Stress for DNVGL-ST-F101:2017

    For the ASD output using DNVGL-ST-F101 design code, I've the following two queries. I’m using Autopipe version 12.05. Query-1: In the output screen shot below, for the yellow highlighted gravity case (GR_ASD), Autopipe presents code stress (Longitudinal…
  • What was changed in how Restrained-Expansion is calculated using ASME B31.4 code for the bend arc between version 11.04.00.01 and version 12.01.00.09?

    I was investigating discrepancies between a model run in version 11.04.00.10 and in version 12.01.00.09 using ASME B31.4 code. When a model created in v11 was opened in v12, total stress levels were observed to be 1-2% higher than in v11, with no changes…
  • Modeling Soil as Flowable Fill

    What is the best way to model flowable fill in Autopipe? I model direct buried piping systems all the time in sandy soil, but I'm looking for some advice as to how to best model flowable fill. The properties of flowable fill can vary greatly, but below…
  • Please explain me the what is the general stress calculation and what is the code compliance calculation, Is these the separate concepts? And which concept is usually used for analyzing stress?

    Difference between general stress and code compliance
  • Hi all, Can Autopipe imposed displacement in degree ? i would like to impose a 5 degree displacement at the end point of pipe.

    Hi all, Can Autopipe imposed displacement in degree ? i would like to impose a 5 degree displacement at the end point of pipe.
  • Nonlinear vibration

    Hello, I have a question regarding the frequency and then transient analysis of a piping system with nonlinear supports and joints (such as cubic stiffness or by linear springs): How does the Autopipe handle the solution? Is it a direct solution…
  • V-Stop vs Line Stop in Vertical Pipe?

    I want to know what is the difference between using a line stop and a v-stop in a vertical pipe? If a v-stop is used with gaps 0mm, does it mean same as line stop with gap 0mm? In which condition of vertical pipe should we use line stop or v-stop…
  • Purpose of selecting joint end type in valve data input

    I want to know why there is an option to select valves joint end type as Weldneck and Slip-on. In my opinion, the joint end connection like this is associated with flanges to pipe connection only, so what purpose does it serves to select weldneck or…
  • Autopipe mistake in ASD stress checking according to DNV-2012 (Urgent)

    Please be informed that we are struggling with Autopipe ASD stress checking according to DNV-2012 design code. I made an Autopipe model to do a code stress checking according to DNV. Unfortunately, during verification of Autopipe results I discovered…
  • SUPPORT FRICTION COEFFICIENT INPUT

    I am currently analyzing a high-pressure steam header line. The steam header has 3 legs, two sliding and a fixed leg at the centre. The legs are welded around the bottom circumference of the header and to a plate at the bottom. And those plates are bolted…
  • Lift-off check analysis feature : Do occasional load cases take into account the hot sustained stress

    I understand that the expansion stress and sustained stress calculated by auto-pipe take into account the pipe lifting off supports during operating case (as each operating case is defined in separate analysis set as per 31.3 option). But what about occasional…
  • Modeling Glass Lined Piping in Autopipe

    Hi All, As I am having Glass lined Piping with me for analysis but don't know how to model and do analysis in Autopipe. Your help is appreciated Thanks
  • .tti units

    I am using AutoPipe Nuclear Version 10.00.00.10 When creating a .tti file is there any way to change the units? AutoPipe produces a .tti file in imperial units. I have played about with the General Model Options units and the .tti file is always in…
  • not able to access technical support

    Hi, when i click Technical support tag, it says access denied. Whats the reason? Please help.
  • How to appropriately model effect of new piping connection to existing, energized piping?

    I am trying to model an extension to an existing steam piping network, and its effect on the existing piping. The steam system operates at 750 F and 400 psig. The new piping will be hot-tapped to the existing line while it is active, so the existing system…
  • Displacement Calculations

    How does AutoPIPE calculate displacement of various points throughout a given model? I have been unable to find anything concrete online or in the help files. I am modeling a scenario for a colleague and his calculations using standard beam deflection…
  • Pump modeling - Overstress at the tee

    I am new for Piping Stress analysis, hope to get your help. I created three pumps in a piping system, I set an anchor at the suction part, and another anchor at the discharge part. The discharge pipe is connected to another line via a TEE. The analysis…
  • Friction Scale Factor

    I am new to use AutoPipe. Currently I am modeling a 48" steam line with DP: 70 psi, and DT: 377F. Could you let me know what is the proper friction scale factor in this case. Thanks,
  • E801-24: Number of MSRS groups is inconsistent with SAM case

    How to fix this kind of error message? "E801-24: Number of MSRS groups is inconsistent with SAM case"
  • How to find worst case of concentrated forces?

    Hi, I am modelling a pipe system where concentrated forces and moments are applied (in Gravity case) at the interface connection points. Is there a way to check which sign combination that gives the worst result regarding stresses and restraint forces…
  • Fatigue Usage Factor

    I'm running a Class 1 NB fatigue analysis. I've specified 4 temp cases, along with the number of cycles. Within the output report, it shows autopipe going thru the iterations, however, at the end, for the summary of usage factor, it only shows the usage…
  • Resultant Forces in Axially Rotated Model

    Hello, The problem that I am having is that my model at some point shifts off of the AutoPIPE X,Y,Z axis. Here is a picture of a section of my current model: As you can see, the model shifts (lets assume 45 degrees negative to the +Z axis for simplicity…
  • How to copy from Excel back into AutoPIPE?

    I thought a lot of people might have this issue, but I couldn't find anything about it in the forums, so here goes: I have a bunch of concentrated forces (a few hundred), all of the same magnitude, throughout my piping system, as a sort of a simplified…
  • Multiple cases simultaneously for Time history vs. several independent

    Hello, When modelling and analyzing a fluid transient, during the Time History Analysis is there a difference between analyzing each branch/segment one at a time versus having multiple segments per load case and multiple load cases? I am a new user and…
  • AutoPIPE Insider Skills - Special Interest Group FREE Seminar!

    Join us this Thursday for our AutoPIPE Insider Skills Seminar! FREE Live Seminars to sharpen your skills. The Insider Skills - Special Interest Group series is offered weekly and AutoPIPE is featured on week 2 of each month . When: Thursday, July…