Concentric reducer standard system
There are two main international standards for pipe flanges, that is, the European pipe flange system represented by the German DIN (including the former Soviet Union) and the American pipe flange system represented by the American ANSI pipe flanges. In addition, there are Japanese JIS pipe flanges, but generally only used for public works in petrochemical plants, and has a relatively small international impact.
Pipe flange is now introduced in various countries under the following:
1, to the German and the former Soviet Union as the representative of the European system tube flange
2, American system tube flange standard, represented by ANSI B16.5 and ANSI B 16.47 glenflange
3, the British and French pipe flange standards, the two countries have two sets of pipe flange standards.
In summary, the internationally accepted standards for pipe flange can be summarized as two different and can not be interchangeable pipe flange system: a European tube flange represented by Germany; the other is represented by the United States American tube flange system. IOS7005-1 is a standard issued by the International Organization for Standardization in 1992, which is actually a pipe flange standard that combines two series of pipe flanges from the United States and Germany.glenflange