GB/T 14626-1993 Forged steel threaded pipe fittings

GB/T 14383-2008 Forged fittings,socket-welding and threaded

JB 755 GB/T 699-1999 Quality carbon structural steels GB/T 699-2015 Quality carbon structure steels GB/T 1220-1992 Stainless steel bars GB/T 1220-2007 Stainless steel bars GB/T 1221-1992 Heat-resisting steel bars GB/T 1221-2007 Heat-resistant steel bars GB/T 1591-1994 High strength low alloy structural steels GB/T 1591-2008 High strength low alloy structural steels GB/T 1591-2018 High strength low alloy structural steels GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 3077-1999 Alloy structure steels GB/T 3077-2015 Alloy structure steels GB/T 7306.1-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 1:Parallel internal and taper external threads GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2:Taper internal and external threads GB/T 12716-2002 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads GB/T 13384-1992 General specifications for packagings of mechanical and electrical products GB/T 13384-2008 General specifications for packing of mechanical and electrical product

ANSI B16.11