including the former Soviet Union) as the representative of the European system and the pipe flange ANSI pipe flanges to the United States on behalf of the American pipe flange system. In addition, there are Japanese JIS pipe flanges, but in the petrochemical plant is generally only used in public works, and less impact in the international arena. Now in the following countries flange profile:

1, to Germany and the former Soviet Union as the representative of the European system of pipe flange

2, Inter-American system pipe flange standards to ANSI B16.5 and ANSI B 16.47, represented

3, Britain and France flange standard, the two have two sets of pipe flange standards.

In summary, the international standard through the pipe flange can be summarized as two different and not interchangeable flange system: a to Germany on behalf of the European pipe flange system; the other is represented by the United States American pipe flange system.

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