This standard specifies the type, size, technical requirements, inspection, packaging and marking of forged steel threaded pipe fittings with a nominal diameter of DN8 to 100. This standard applies to forged steel threaded pipe fittings used in pipeline engineering in petroleum, chemical, mechanical, electric power, textile, chemical fiber, metallurgical and other departments.
GB/T 14626-1993 history
2021GB/T 14383-2021 Forged fittings, socket-welding and threaded
2008GB/T 14383-2008 Forged fittings,socket-welding and threaded