1:seamless steel pipe 2:OD:9.5--219mm 3:Thickness(mm):0.25-- ... Not: Non-secondaryApplication: Oil PipeTechnique: Hot RolledCertification: APISurface Treatment: GalvanizedSpecial Pipe: API PipeAlloy Or Not: Non-alloyType: SeamlessModel Number: 6MM-1000MM ... , API K55, Q195, Q215, Q235...Outer Diameter: 6MM-1000MMseamless steel pipe: 1)standard: GB,DIN,ASTM,EN,BS,AND,SO,ON ...