Re: [MW:6943] Branch opening on longitudinal seem of main pipe

Dear Ashim,

A)Long seam to Branch weld distance should be 6t or 50mm whichever is higher for presser part.

 

B)And Long seam to Branch(attachment) weld distance should be min.2t. for non presser parts like supports.

 

If above condition is not fulfilled than you take affected long seam length+50mm each side RT or UT and Branch weld shall be inspected by appropriate NDT.

 

For category D type fluid you can use MPI or DPI instead of RT/UT for butt weld.

 

So, Branch opening on long seam is acceptable if it comply with above conditions.

 

 

Thanks,
With Best Regards,
Ramesh Barot

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From: ASIM MUNIR <asimmunir.002@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Thu, September 9, 2010 12:15:44 AM
Subject: [MW:6935] Branch opening on longitudinal seem of main pipe

Dear all
As per ASME B31.3 what is criteria of branch opening on longitudinal
seem of main pipe ?
A branch opening made on longitudinal seem of pipe is it acceptable in
any mean

Thanks in advance

Regards
ASIM

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