Welding 12" sch 40 pipe with 12" sch 20 WN flange
Welding 12" sch 40 pipe with 12" sch 20 WN flange
(OP)
Hi Everyone..!
Due to mistake of procurement we have 12" 300# Sch20 flanges delivered at site instead of required 12" 300# Sch40 flanges.
Is it permissible to trim the pipe ends for weldability..?
Line conditions are
Oper. Press.: 24.53 Kg/cm2 g
Design Press.: 48 Kg/cm2 g
Oper. Temp.: 45 C
Design Temp.: 87 C
Due to mistake of procurement we have 12" 300# Sch20 flanges delivered at site instead of required 12" 300# Sch40 flanges.
Is it permissible to trim the pipe ends for weldability..?
Line conditions are
Oper. Press.: 24.53 Kg/cm2 g
Design Press.: 48 Kg/cm2 g
Oper. Temp.: 45 C
Design Temp.: 87 C





RE: Welding 12" sch 40 pipe with 12" sch 20 WN flange
Considering what happened, I would reject the fitting for use in this pipe system.
RE: Welding 12" sch 40 pipe with 12" sch 20 WN flange
RE: Welding 12" sch 40 pipe with 12" sch 20 WN flange
My concern is these flanges are to be installed at pump discharge. Should I take the risk of installing Sch20 flanges or not..??
RE: Welding 12" sch 40 pipe with 12" sch 20 WN flange