... standards, power standards), American standard, German standard, Japanese standard, the Russian standard.Pipe flange standard system on the international 2,The ... the German DIN (Soviet Union), the British Standard BS, French standard NF, Italian standard UNI, a, Nominal pressure: 0.1, ... , tongue and groove, ring joint faceFlange production standard Chinese Standard:GB/T9112-2000(GB9113.1-2000~GB9123?4 ...