The common species and introduced threaded fittings

　　Generally speaking, the screw thread pipe fittings has two, one is pipe screw thread pipe fittings, pipe faucet, pipe outside the wire, pipe single head wire, tubing thread leather pipe joint and the thickness and length can be customized according to customer demand, the outer surface is polished; another is casting screw thread pipe fittings, commonly known as the albino fittings, internal thread elbow, hexagonal wire, hexagonal leather pipe joint, internal thread three-way, inner thread woggle joint, internal thread plug, screw hat, complement core, different diameter tee, different size first all kinds of connection mode is threaded connection.

　　Screw thread pipe fittings according to use can be divided into the following categories:

　　1, for pipe connected fittings: flange, union, Guan Gu, card sets, hoop drawing three.

　　2, change the direction of the pipe fittings: elbow, elbow.

　　3, change the diameter of the pipe fittings: reducer （reducer）， reducing elbow, pipe, reinforcing pipe.

　　4, increase the pipeline fittings branch: three, four.

　　5, for sealed pipeline fittings: gasket, PTFE tape, hemp, blind flange, pipe blockage, blind plate, head, welding plug.

　　6, the pipeline fittings for fixed clasp, hook, rings, bracket, bracket, pipe etc