... ,STD,XS,XXS Standard: ASTM,DIN,BS Material:ASTM A23 API anticorrosive steel pipe with good quality :anticorrosive pipeHigh quality,low ... steel,carbon steel,alloy steelStandard: ANSI,JIS,BS,DIN,ASME,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 ,and ...