Pipe weldment question
Pipe weldment question
(OP)
Newbie here-
A large machine we build and sell has an air compressor that feeds an air holding tank. The compressor is either diesel or electric motor driven. The air holding tank is an ASME "U" stamped pressure vessel, MAWP is 250 psi.
There is a short pipe that connects the air compressor to the ASME air tank. The pipe is basically a 90 deg. elbow with a butt welded flange on each end. (8" nom. dia.) This pipe spool piece connects the compressor and the ASME pressure vessel. This pipe piece is a subcontracted purchased item, and I recently noticed visually some weld quality issues on the flange welds.
My question is: Is the manufacturer (vendor) of this welded pipe piece required to have some qualification, or certificate of authorization, ...like a "PP" stamp?
Thx!
A large machine we build and sell has an air compressor that feeds an air holding tank. The compressor is either diesel or electric motor driven. The air holding tank is an ASME "U" stamped pressure vessel, MAWP is 250 psi.
There is a short pipe that connects the air compressor to the ASME air tank. The pipe is basically a 90 deg. elbow with a butt welded flange on each end. (8" nom. dia.) This pipe spool piece connects the compressor and the ASME pressure vessel. This pipe piece is a subcontracted purchased item, and I recently noticed visually some weld quality issues on the flange welds.
My question is: Is the manufacturer (vendor) of this welded pipe piece required to have some qualification, or certificate of authorization, ...like a "PP" stamp?
Thx!





RE: Pipe weldment question
Larry
RE: Pipe weldment question
RE: Pipe weldment question
I work at NASA in Cleveland; NASA is applying Code compliance requirements internally. In addition, State of Ohio requires Code compliance --
Ohio Revised Code:
ยง 4104.42. Duties of owner of power piping or process piping system.
(A) The owner of any power piping or process piping system shall ensure that all of the following are performed in compliance with applicable sections of the B31 standards contained in the code for pressure piping, published by the American society of mechanical engineers:
(1) The design, fabrication, assembly, installation, testing, examination, and inspection of power and process piping systems;
(2) Qualification of personnel and qualification of welding and brazing procedures;
(3) The implementation of an inspection program.
Also addresses records and documentation. Compressed Air piping is included in the scope.
Larry