PVC Pipe and Fittings Library: Difference between revisions
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Probably the problem was caused by having many common or coplanar faces of the parts. See [https://www.freecadweb.org/tracker/view.php?id=2831]. | Probably the problem was caused by having many common or coplanar faces of the parts. See [https://www.freecadweb.org/tracker/view.php?id=2831]. | ||
==90° - | ==90° - degree elbow== | ||
Described by 3 dimensions: | Described by 3 dimensions: | ||
size, G,H,M. Other dimensions are derived from NPS pipe-dimensions. | size, G,H,M. Other dimensions are derived from NPS pipe-dimensions. | ||
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=Notes= | =Notes= | ||
"O.D." = "Average I.D."+2"Min. Wall" | "O.D." = "Average I.D."+2"Min. Wall" | ||
=Tees= | |||
Described by | |||
G, G1, H, H1, L, M, Some other dimensions are taken from the pipe dimensions. | |||
=Gallery= | =Gallery= | ||
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File:pvc-pipe-nps-sch40-1d8.png |'''SCH40 1/8" PVC pipe''' - size:5kb - FreeCAD -[[File:pvc-pipe-nps-sch40-1d8.fcstd]], | File:pvc-pipe-nps-sch40-1d8.png |'''SCH40 1/8" PVC pipe''' - size:5kb - FreeCAD -[[File:pvc-pipe-nps-sch40-1d8.fcstd]], | ||
File:thumbnail-pvc-elbow-60deg.png |'''Elbow test file''' - size:5kb - FreeCAD -[[File:pvc-elbow-test-60deg.fcstd]] | File:thumbnail-pvc-elbow-60deg.png |'''Elbow test file''' - size:5kb - FreeCAD -[[File:pvc-elbow-test-60deg.fcstd]] | ||
File:pvc-tee-cad-sceenshot.png |'''Tee test file''' - size:24kb - FreeCAD -[[File:pvc-tee-test.fcstd]] | |||
</gallery> | </gallery> | ||
=Macros= | =Macros= | ||
Macros are now in a git repository [https://github.com/rkrenzler/ose-piping-library]. | |||
== Pipes == | == Pipes == | ||
To create Pipes 40 and 80 Schedule PVC pipes [[File:pvc-pipe-nps.fcmacro]] | To create Pipes 40 and 80 Schedule PVC pipes [[File:pvc-pipe-nps.fcmacro]] | ||
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[[File:90-deg-elbow-screenshot.png|thumb]] | [[File:90-deg-elbow-screenshot.png|thumb]] | ||
== Tee == | |||
Run [[File:create-tee.fcmacro]] and select a part from the table | |||
[[File:pvc-tee-gui-screenshot.png|thumb]] | |||
[[File:pvc-tee-cad-screenshot.png|thumb]] | |||
= How to create a pipe macro = | = How to create a pipe macro = | ||
Revision as of 22:32, 16 December 2017
Pipes
The dimensions of the PVC pipes can be found here PVC_Pipe. Wikipedia on Nominal Pipe Size (NPS) [1],
We will use following guide line for position of a pipe: put one end (base) of the pipe onto the x-y plane. The center of the base has coordinate (0,0,0). The other end points to the positive direction of the z-axis.
Rationale: This is the same way FreeCAD places a new cylinder. We mimic the FreeCAD behavior for UI consistancy.
The default pipe length is 1ft. This is an arbitrary choice. When I use a macro, it will store the last length used by the user.
Elbows
Useful links: [2]
Simple general elbows
This is an intermediate solution. Here I do not follow particular NPT-Standards. Later I will translate the NPT-Parameters in these general dimensions.
To create general elbow with 6 Parameters:
- alpha - angle of the elbow.
- R1 - inner radius of the bending part.
- R2 - inner radius of the elbow.
- R3 - outer radius of the elbow parts.
- L1 - length of one part part of the elbow.
- L2 - length of the another part of the elbow.
I had problems to join all parts of the elbow in FreeCAD. The solution was to make the bent part a little bit smaller. Probably the problem was caused by having many common or coplanar faces of the parts. See [3].
90° - degree elbow
Described by 3 dimensions: size, G,H,M. Other dimensions are derived from NPS pipe-dimensions.
Notations
- O.D. - outer diameter.
- Average I.D. - average inner diameter (why average?). This dimension determines the size of the pipe.
- Min. Wall - thickness of the pipe wall.
- Schedule - determines (indirectly) the thickness of the wall.
Notes
"O.D." = "Average I.D."+2"Min. Wall"
Tees
Described by
G, G1, H, H1, L, M, Some other dimensions are taken from the pipe dimensions.
Gallery
SCH40 1/8" PVC pipe - size:5kb - FreeCAD -File:Pvc-pipe-nps-sch40-1d8.fcstd,
Elbow test file - size:5kb - FreeCAD -File:Pvc-elbow-test-60deg.fcstd
- Pvc-tee-cad-sceenshot.png
Tee test file - size:24kb - FreeCAD -File:Pvc-tee-test.fcstd
Macros
Macros are now in a git repository [4].
Pipes
To create Pipes 40 and 80 Schedule PVC pipes File:Pvc-pipe-nps.fcmacro
Ellbows
(Experimental) Run File:Create-elbow.fcmacro with parameters G, H and M from a table.
Tee
Run File:Create-tee.fcmacro and select a part from the table
How to create a pipe macro
Steps to create GUI: The original instruction are taken from [[5]] but I (Ruslan) have problems with them. I adjusted them to FreeCAD.
- Create with QT Designer a Dialog based on QDialog class. Save the name for example add-nps-pvc-pipe-dialog.ui
- Convert add-nps-pvc-pipe-dialog.ui to python code running
- pyside-uic add-nps-pvc-pipe-dialog.ui -o pipe-dialog.py
- or call
- pyside-uic --indent=0 add-nps-pvc-pipe-dialog.ui -o pipe-dialog.py
- to use tabs as indention.
- If you use the FreeCAD macro editor, pay attention that the indention of pyside-uic and of the editor are the same.
- Insert content of the methods setupUi(self, Dialog) and retranslateUi(self, Dialog) from pipe-dialog.py (How can I insert here a block of python code?) into your macro file.