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minimum pipe distance

minimum pipe distance

minimum pipe distance

We have a 36" dia. pipe (wt= 1")and have two outlets- 24" pipe(wt=0.5")across from each other coming out of the 36" pipe.
We need to install another 20" pipe(wt=0.5") outlet on the 36" pipe.
According to ASME code 31.3 what is the minimum distance required between the pipes 24" and 20"?
As per basic calcs. there is no reinforcement required for the two 24" outlets.
e-mial: yusuf.mogri@fmcti.com

RE: minimum pipe distance


B31 does not really have a requirement for spacing branches (other than some guidance on overlapping repad areas) but perhaps you should look at Pipe Fabrication Insttute document:

ES7 R94/RA02 Minimum Length and Spacing for Welded Nozzles 20.00

Go here:


This is a commonly used standard.

Regards, John.

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