Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Attention: Please see the following AutoPIPE help section: Help Contents Contents Tab Modeling Approaches Modeling Approaches This help has been provided in order to give users ideas for modeling typical piping arrangements. The steps shown in each example should not be taken as the only method available to create models. In addition, the intent of the examples is to present ways to create adequate models of specific piping components for analytical purposes. Anchors Bends Cuts Flexible Joints Frames Hangers Nozzles Pipes Reducers Rotating Equipment Supports Tees Valves Vessels Questions and Answers: Item #1: How does AutoPIPE calculate the weight of a typical pipe fittings (i.e. Tee, elbow, reducer, etc..)? Answer: AutoPIPE fittings are made up of equivalent center-line length of straight pipe with assigned pipe properties. Change the pipe properties used to construct a fitting in order to account for different fitting weights. Reducer are the only exception, (from online help): Over the length of the reducer, AutoPIPE assumes an average of the connecting pipes for the outside diameter (Do), wall thickness (t). This affects the reducer weight, pipe contents weight, and section properties. Material properties (E, a, and allowable stresses) from the pipe at the near end of the reducer are extended to the far end of the reducer. Item #2: How to model branch fitting (i.e. tee, weldolet, sockolet,etc..) on strait pipe using one of 3 methods: Single Point Method, 2-Point Method, or 3-Point Method. Answer: See the attached file for details . Item #3: How to model a branch (elbolet, weldolet, sockolet, etc...) fitting on an elbow? Answer: Please see the following AutoPIPE help section: Help Contents Contents Tab Modeling Approaches Modeling Approaches Bends Base Supported Elbow Model 5: Modeling a "dummy leg" as a pipe. Referring to the example and related node numbers, model exactly as shown in this example with the added steps. Step #10, at node B01 (weld location of fitting to the pipe) Insert Xtra Data Joint Type and user SIF, specify the correct SIF. Step #11, select Node B01, Insert Run B03, length = length of fitting (location where branch piping is welded to the fitting). Step #12, select Node B03, Insert Xtra Data Joint Type and user SIF, specify the correct SIF. Step #13, optional if you believe the fitting is rigid, click on the pipe between B01 and B03 to select this pipe (highlighted Red) then select Insert Rigid Options Over Range with Include Weight = yes, Include Thermal Expansion = Yes (shown as purple). Item #4: How to model a flanged cross pipe fitting? Answer: Creating a flanged cross in AutoPIPE is indeed possible. A. Insert a run equal in length to the distance from the face of the cross to it's center-line. B. At that center-line go to Modify Convert Point To/Tee C. Go to Modify Tee and a dialog box will appear. In that dialog box, using the drop down arrows, change "Tee Component" from Tee to Cross. Also change "Type of Tee" from Welding to Other. D. New boxes will open for In Plane and Out Of Plane SIF. These will have to be input manually as they are generally specific to the cross manufacturer. E. Select OK F. Now continue to code in the balance of the cross (header first and then the 2 branches) with the lengths equal to the distance from the center-line of the cross to the faces of the header and branches. G. Insert Flange (and specify required flange data) at each of the 4 faces of the cross. Please note that in your model consistency check you will see a warning similar to the following: * * * W A R N I N G - MODEL * * * W726-10: User SIF required at junction at point A02 Note: Even if you have input the SIFs for the cross, this warning will continue to appear. It is not an error and will not prevent the program from running. It is there to remind clients that a user SIF value is required for that point. 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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