Valves, fittings, valves and fittings there , they are used to connect pipes or control system . Valves and fittings can not exist independently and complementary.

Many tube types , classified according to use this connection , materials, processing methods.

By Use :

1 , pipe fittings for tubing connected to each other : flange , union , pipe clamps , card sets, hose clamps , etc.

2 , changing the direction of pipe fittings : elbow, elbow

3 , changing the diameter of the pipe fittings : adjustable ( diameter pipe ) , reducing elbow , branch units , reinforcing tube

4 , increasing the branch pipeline fittings : three, four

5 , fittings for pipe sealing : gaskets, Teflon tape , hemp , blind flanges , plugs , blind , head, welding plug

6 , for a fixed pipe fittings : clasp , tow hooks , rings , brackets , bracket, tube cards

Industry Standard

1 ) " welded steel seamless pipe fittings " GB / T 12459-2005

2 ) " steel plate pipe fittings " GB / T 13401-2005

3 ) " power plant steel pipe fittings " DL / T 695-1999

SH 3408 welded steel seamless pipe fittings

SH 3409 steel plate welded pipe fittings

SH 3410 Forged steel socket welding fittings

HGJ514-87 carbon steel, low alloy steel seamless pipe fittings

Standard system :

International standard pipe flanges There are two main systems , namely the German DIN ( including the former Soviet Union ) as the representative of the European system and the pipe flange pipe flange to the United States as the representative of ANSI pipe flanges American system . In addition , there are Japanese JIS pipe flanges , but in the petrochemical industry in general used only for public works, and less impact in the international arena . Introduction pipe flanges countries now at :

1 , with Germany and the former Soviet Union as the representative of the European system of pipe flanges

2, the inter-American system of standard pipe flanges to ANSI B16.5 and ANSI B 16.47 , represented

3 , Britain and France pipe flange standards, the two countries have their own sets of standard pipe flanges .

In summary, the internationally accepted standard pipe flanges can be summarized as two different and not interchangeable flange system : one to Germany on behalf of the European pipe flange system ; another is the representative of the United States American pipe flange system.

IOS7005-1 is a standard promulgated by the International Organization for Standardization in 1992 , the standard is actually the United States and Germany, two series of pipe flanges merger of standard pipe flanges .