seamless steel pipe 1)Executive standard:ASTM A 53 2)SIZE:a)OD:25-325mm b)WT:4-70mm Standard:ASTM A53 seamless steel pipe description detail:Executive standard:1.ASTM A106gr b/ A178-c/ A210-A,JISG3454/3455/3461/3456,DIN7175/1626/1629;2.JIS G345,ASTM A210-C,DIN1629/17155;3.JIS G3201/G4051,DIN17200,ASTM A266Specification range: a)OD:25-325mm b)WT:4-70mm a53 gr.b seamless steel pipe