... : 1 - 80mm 3) Manufacturing stand 1) Seamless Outside diameter: 20 - 1,067mm 2) Seamless Thickness: 1 - 150mm3) Manufacturing standard: GB DIN JIS ... T91; API5L GR.B, ASTM A106, ASTM A53 Big Od Seamless Alloy And Carbon Pipes Astm A53a, A53b, A106b, A106c, A179 ...