Is Welded Relief Valve In Scope of Code?
Is Welded Relief Valve In Scope of Code?
(OP)
When a fabricator attaches a relief valve to an ASME Sect VIII, Div 1 pressure vessel by welding, must the valve now be considered to be within the scope of the code as defined in paragraph U-1(e)(1)?





RE: Is Welded Relief Valve In Scope of Code?
the welding end connection is within the scope of this code. So, if you have a nozzle that is originally welded to the shell and the end of the nozzle is prepped to accomodate the safety relief valve, the boundary of Section VIII, Div 1 ends at the weld prep of the nozzle.
RE: Is Welded Relief Valve In Scope of Code?
RE: Is Welded Relief Valve In Scope of Code?
RE: Is Welded Relief Valve In Scope of Code?
RE: Is Welded Relief Valve In Scope of Code?
In the case you described, was the flange listed on the U-1 form? The Code scope can end at the nozzle neck stub, thereby making the weld and (typically) weld-neck flange piping, but in my experience the predominant approach is that the scope is extended to the face-of-flange and the flange is listed on the Code paperwork. If the U-1 lists the nozzle and provides flange info, then the fabricator has some 'splaining to do.
Either way... I won't ask you to identify the fabricator, but I wouldn't throw any more business at them...
jt
RE: Is Welded Relief Valve In Scope of Code?