There are two main international standards for pipe flanges, 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 have little influence in the international arena. The following is a brief introduction of pipe flanges in various countries:
1. European system pipe flange represented by Germany and former Soviet Union
2，美洲体系管法兰标准，以ANSI B16.5和ANSI B 16.47为代表
2. American System Pipe Flange Standard, represented by ANSI B16.5 and ANSI B 16.47
3. British and French pipe flange standards, each of which has two casing flange standards.
To sum up, the international standard of pipe flange can be summarized as two different and sujiao.07858.netwulumuqi.89ix.comlanzhou.89ix.comxian.89ix.comnon-interchangeable pipe flange gangguanl.37ix.com.cnzhimaig.37ix.com.cnsystems: one is the European pipe flange system represented by Germany, the other is the American pipe flange system represented by the United States.
IOS7005-1 is a standard promulgated by the International Organization for Standardization in 1992. This standard is actually a standard for pipe flanges which combines two series of pipe flanges in the United States and Germany.