tube steel distributor required with ASTM A106 GradeB 1.standard: ASTM API etc 2.OD: 20 - 610 mm ... short 5.High quality 1.standard : API ISO ASTM JIS2.Outside Dimeter: 20 - 610 mm3.Wall Thickness ... Seamless steel pipe:1. Standard:GB JIS DIN ASTM API and so on2. Application:the seamless steel ... ,product Details StandardBS, JIS, GB, DIN, ASTM, APIStandardASTM A106,ASTM A53,10#,20# and so onGradeGr.B,X42 ...