Seamed Pipe - Multiple Seams Allowed?
Seamed Pipe - Multiple Seams Allowed?
(OP)
Does ASME piping code allow welded seam pipe to have multiple seams? Specifically I'm curious about 24" 10s 304-L SS pipe. If multiple seams are allowed, is there a limit? Anyone seem pipe come in with 2 and 3 weld seams? I'm referring to longitudinal seams, not circumfrential.
thanks.
thanks.





RE: Seamed Pipe - Multiple Seams Allowed?
RE: Seamed Pipe - Multiple Seams Allowed?
Welded pipe and HCW pipe of NPS 14 and smaller
shall have a single longitudinal weld. Welded pipe and HCW
pipe of a size larger than NPS 14 shall have a single
longitudinal weld or shall be produced by forming and welding
two longitudinal sections of flat stock when approved by the
purchaser. All weld tests, examinations, inspections, or treatments
shall be performed on each weld seam.
This statement indicates to me that two seams would have been OK, had the manufacturer gained permission to do so. Hmmm... Wonder if someone in procurement gave permission for that.
RE: Seamed Pipe - Multiple Seams Allowed?
I've seen very large AWWA-spec carbon steel pipe made that way, turned out to have been made in Mexico out of used oil storage tank plates. We rejected it.
RE: Seamed Pipe - Multiple Seams Allowed?
RE: Seamed Pipe - Multiple Seams Allowed?
I'll get more info on it tomorrow.
RE: Seamed Pipe - Multiple Seams Allowed?