1:seamless steel pipe 2:OD:9.5--219mm 3 ... )Secondary Or Not: Non-secondaryApplication: Oil PipeTechnique: Hot RolledCertification: APISurface Treatment: GalvanizedSpecial Pipe: API PipeAlloy Or Not: Non- ... , Q195, Q215, Q235...Outer Diameter: 6MM-1000MMseamless steel pipe: 1)standard: GB,DIN,ASTM,EN,BS,AND,SO ... .3mm-711mm b) wall thickness:0.5-55mmseamless steel pipeSteel standard : ASTM.JIS,DIN,GB,EN,BS ...