Domestic and foreign seamless steel pipe standards which domestic standards are GB/T 8162, GB/T8163, GB5310, GB3087, GB9948, GB6479, GB/T5312, GB/T3639, GB18248, GB/T9711 and so on. Sintered Neodymium Magnet-Different Application Motor Magnet,Generator Magnet,Automobile Magnet,Speaker Magnet Hawell Magnetics Co., Ltd. , http://www.nbdfebmagnetic.com
Foreign standards include ASTM, API, ANSI, ASME, JIS, DIN, BS, etc.
The seamless steel pipe standard is shared by Shandong Seamless Steel Tube Factory.