Author Topic: Pipe Cutting in the shop vs CAD/Revit  (Read 49 times)

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Offline Darren YoungTopic starter

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Pipe Cutting in the shop vs CAD/Revit
« on: Dec 04, 2019, 11:57:41 PM »
Question for the group…

Likely applicable to anyone with any pipe cutter, but specifically more applicable to the Watts/PypeServer.

2 situations our shop asked about with regard to CAD/Revit and I’m curious how other shops handle them.

1)   After we cut beveled end pipe, the end of the bevel is ground flat slightly. This shortens the pipe.
2)   After we groove pipe (specifically, 14” and larger AGS) it can grow 1/8” per end.

In CAD/BIM, we typically draw and have our systems configured to show the desired weld gap (Buttweld) and or end separation (grooved). This is typically the length we communicate to the shop or that shows up in a PC3.

However, in the shop, the length changes. Grinding the bevel shortens the pipe, grooving the pipe lengthens it.

Now, we “could” configure our CAD/BIM systems to compensate for this. But that means any detailer looking at a Buttweld system in CAD sees a weld gap too small or pipe end separation too large if grooved. They then conclude things are not setup correctly as they don’t understand these details of the shop.

Curious how others are handling this...is the shop adjusting manually? Ignored and the field deals with it?
Compensated in CAD/Revit and teach the detailers that what they see isn't what's really happening?