High pressure pipe fittings are used in specific environments such as high pressure steam equipment, chemical high temperature and high pressure pipes, power plant and nuclear power plant pressure vessels, high pressure boiler fittings, etc.Pipe fitting is a general term for the parts and components that play the role of connection, control, direction change, diversion, sealing and support in the pipeline system.Pipe fittings use classification 1, used for tube connected to each other fittings are: flange, articulated, pipe hoop, card sets and throat hoop, etc. 2, change the direction of the pipe fittings, elbow 3, change the pipe diameter of the tube: variable diameter (reducer), reducing elbow 4, add piping branch pipe fittings: tee, four-way 5, used for pipe line seal:Gasket, raw material belt, wire hemp, flange blind plate, pipe plug 6, used for pipe fixing: clasp, drag hook, lifting ring, bracket, bracket, pipe card and other pipe fittings are the parts to connect the pipe into the pipeline.According to the connection method, it can be divided into socket fittings, threaded fittings, flanged fittings and welded fittings.Often made of the same material as the pipe.