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ASME B16.11 dictated bore vs. nominal pipe OD & SolidWorks

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nctexan22

Mechanical
Apr 14, 2008
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The input:

I have a 2" nominal pipe (2.375" outer diameter) that I need to socket weld into a bore I'm referencing from B16.11. B16.11 for a 2" nominal pipe gives "B", the socket bore diameter, as 2.426/2.406.

My questions:

1) Why is there such a large gap (.031" min) between pipe OD and socket bore?

2) How do I add a weld bead in SolidWorks if a coincident edge is not present (between pipe OD and socket bore)?

Assumptions:

1) Heat from welding may cause thermal expansion of pipe OD.
2) Pipe is dimensioned from the ID, so the OD is subject to a variance of it's OD dimension of 2.375".


Much thanks for any input!
 
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