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