... secondaryApplication: Oil PipeTechnique: Hot RolledCertification: APISurface Treatment: GalvanizedSpecial Pipe: API PipeAlloy Or Not: Non-alloyType: SeamlessModel Number ... 6M,12M,Specification: ASTMA315B,ASTMA53A,ST37Usage: gas transport,boiler,heat exchangerStandard: ASME, ANSIGrade: A53B, API J55, API ... , Q215, Q235...Outer Diameter: 6MM-1000MMseamless steel pipe: 1)standard: GB,DIN,ASTM,EN,BS,AND ...