... ,STD,XS,XXS Standard: ASTM,DIN,BS Material:ASTM API 3PE anticorrosive steel pipe with good quality :Certificate:ISO9001:2000,CE.Size: 1 ... ,API,GB,ectProcess: Cold Draen,Cold Rolled,EFW,ERW,Hot Rolled,SAW.and so on.Structure type: seamless pipe,straight steel pipe,square pipe,spiral pipe ...