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Concentric reducer
Concentric reducer

Concentric reducer

There are two main international pipe flange standards, namely the European pipe flange system represented by G...
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Concentric reducing pipe is, its connection form is directly the reducing pipe and steel pipe butt welding, concentric reducing pipe manufacturing standards are generally GB/T12459, GB/T13401, ASME B16.9, SH3408, SH3409, HG/T21635, HG/T21631, SY/T0510. Concentric reducing pipe and the corresponding eccentric reducing pipe, the material has carbon steel, alloy steel and stainless steel.

Standard system

There are two main international pipe flange standards, namely the European pipe flange system represented by German DIN (including the former Soviet union) and the American pipe flange system represented by American ANSI pipe flange. In addition, there are JIS pipe flanges in Japan, but they are generally only used for public works in petrochemical plants, and they have little influence in the world. Now introduce each country's pipe flange in the following:

1. Pipe flange of European system represented by Germany and former Soviet union

2. American system pipe flange standard, represented by ANSI B16.5 and ANSI B 16.47

3. British and French pipe flanges have two casing flanges.

To sum up, the international common pipe flange standard can be summarized as two different, and not interchangeable pipe flange system: one European pipe flange system represented by Germany; The other is the American pipe flange system represented by the United States.