ASTM 20# seamless steel pipe for liquid transportation 1-standards:ASTM,GB,DIN,JIS ... steel et ASTM 20# seamless steel pipe for liquid transportation SpecificationsChina StandardSteel GradeStandardseamless steel tubesand pipesfor structural purposeGB ... /T8162-199910, 20, 35, 45, 40Mn2, 45Mn2, 27SiMn, 20Cr, 40Cr, 20CrMo, 35CrMo, 38CrMoA1 ...