Sinopec standards
Standard no.
SH3408-1996 steel seamless pipe butt welding
SH3409-1996 forged steel socket welding pipe fittings
SH3410-1996 forged steel socket welding pipe fittings
Petrochemical tubular furnace SH3065-1994 sharp elbow technology standards
The national standard
Standard no.
GB/T12459-2005 steel seamless pipe butt welding
GB/T13401-2005 steel butt welding pipe fittings
Pipe standards of oil standard:
Standard no.
SY/T5257-2004 steel pipe bending
02 s403 steel pipe construction standards of the state
