1:seamless steel pipe 2:OD:9.5--219mm 3:Thickness(mm):0. ... J55, API K55, Q195, Q215, Q235...Outer Diameter: 6MM-1000MMseamless steel pipe: 1)standard: GB,DIN,ASTM,EN,BS,AND,SO ... .D: 21.3mm-711mm b) wall thickness:0.5-55mmseamless steel pipeSteel standard : ASTM.JIS,DIN,GB,EN,BS.Material:A335P12 ...