... seamless Steel pipe 1.Max.diameter: 300mm 2.WD:Sch5-Sch80(1.2mm-60mm 3.ASTM A106,ASME B36.API 5L carbon seamless ... steel pipefactory viewSteel pipe manufacturing process1. step2.step3.stepend producttechnical detection ... 1996 ,API 5L,ANSI ,GB,JIS,DINMaterial:20#,Q235,GR.B,X42,X56,P11,ST37,ST45.8,ST52,S235JR,STP40Packaging:painting black, pipe cap ...