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Rolling offset

Rolling offset

Rolling offset

(OP)
Hi!

The client has issued a project memo to avoid trim elbows. As stated on paragraph 328.4(b)(c) of B31.3 that the max. trim on a ASME B16.9 elbow is 3 degrees.

I am revising the configuration of the pipe and I found out that the only way to connect the line to avoid trimming is to roll two 45 degree elbows.

Can anyone explain and give a theorem/computation or technique in rolling and offseting the 45 degrees elbow without trimming it. It seems to be very difficult to converge them with no percent error.

Best Regards,

Jimpiper


 

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