This standard specifies the type, size, tolerance, technical requirements, inspection, packaging and marking of forged steel socket-welding pipe fittings with a nominal diameter of DN15 to 80. This standard applies to forged steel socket welded pipe fittings for pipeline engineering in petroleum, chemical, mechanical, electric power, textile, chemical fiber, metallurgy and other industries.
GB/T 14383-1993 history
2021GB/T 14383-2021 Forged fittings, socket-welding and threaded
2008GB/T 14383-2008 Forged fittings,socket-welding and threaded