International pipe flange standard there are two main systems, that is in Germany DIN (including the former Soviet Union) as the representative of the European pipe flange system and with the United States as a representative of American pipe flange ANSI pipe flanges system. In addition, Japan JIS flange, but only in the petrochemical installations in General for public works, and influence in the international arena. Flange profile of States in the following:
1, to Germany and the former Soviet Union as the representative of the European system for pipe flanges
2, the Inter-American system of pipe flange standard, represented by the ANSI B16.5 ANSI b 16.47
3, the United Kingdom and France for pipe flange standard, each with two bushing flange standard.
In summary, common international flange standards can be summarized as two different and not interchangeable flange system: one in Germany as the representative of the European system of pipe flange; another is to United States as a representative of American pipe flange system.