Dent before Cold Bending Pipe
Dent before Cold Bending Pipe
(OP)
In a pipe line gas under construction (1440 PSI design pressure), a double joint pipe 42” and WT 0.601” was bent in a cold bending process. Indications were not encountered in the curvature area, but a dent of 3/32" depth in an area no larger than 2” square and close to neutral axis was evidenced. This dent was difficult to observer because was covered by the factory coating.
According to ASME B 31.8, 841.2.3, should the pipe be accepted?
I appreciate yours comments.
According to ASME B 31.8, 841.2.3, should the pipe be accepted?
I appreciate yours comments.





RE: Dent before Cold Bending Pipe
RE: Dent before Cold Bending Pipe
How did they do that?
Is the kink "in" or "out" of a theoretical round?
RE: Dent before Cold Bending Pipe
I want to be clear saying that the dent no was originaed by the bending process, and it was evidenced in the side of the bent (close to the neutral axis).
According to ASME B 31.8, 841.2.3, just at state (a) (1), must immediately the pipe be rejected? , if not, as it was evalueated according to ASME B 31.8, 841.2.4, (c), should the pipe be accepted?
RE: Dent before Cold Bending Pipe
RE: Dent before Cold Bending Pipe
Thanks metengr.