ASME B31.3 Extruded Outlets

[anolan23]

We're doing extruded outlets instead of a pipe to pipe saddle weld now. From what I gathered, ASME B31.3 Paragraph 304.3.4 is the only paragraph that I need to use for calculations. Those are reinforcement calculations.

The extrusion process thins the pipe at the saddle and stirrup a little, but after pulling some samples I noticed that around the collar is where the most thinning occurs. I'm trying to figure out if the saddle/stirrup thickness after extrusion should be compared to run pipe required design thickness (304.1.2) OR if the thinning around the collar should be compared to run pipe required design thickness.

 

[LittleInch]

Your question seems to be in error " should be compared to run pipe required design thickness (304.1.2) OR if the thinning around the collar should be compared to run pipe required design thickness.

I assume you actually meant run pipe or branch pipe.

I would always go for Run pipe. I agree it's not wildly clear, but equally these are minimum requirements so be conservative.

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