... : Non-secondaryApplication: Oil PipeTechnique: Hot RolledCertification: APISurface Treatment: GalvanizedSpecial Pipe: API PipeAlloy Or Not: Non-alloyType: SeamlessModel Number: 6MM-1000MM ... K55, Q195, Q215, Q235...Outer Diameter: 6MM-1000MMseamless steel pipe: 1)standard: GB,DIN,ASTM,EN,BS,AND,SO,ON ... . a)O.D: 21.3mm-711mm b) wall thickness:0.5-55mmseamless steel pipeSteel standard : ASTM.JIS,DIN ...