1,ASTM A36 2,50mm*50mm*2mm*6m Hebei Runcheng Steel Pipe Co., Ltd. is located in the historic city of Cangzhou ... : SA106B, grades, specifications: 1/ 4" -28", 13.7-711.2mm 3 line pipe steel API SPEC5L: B specifications: 1/ 4" -28", 13.7 ... British standard ERW high-frequency welded pipe BS1387, specifications:1/ 2 " -12", 21.3-323.8mm The 3 car transmission shaft of electric ...