... steel et ASTM 20# seamless steel pipe for liquid transportation SpecificationsChina StandardSteel GradeStandardseamless steel tubesand pipesfor ... , ASTM A192 ASTM SA179,SA192, BS3059Seamless Steel Tubes for high pressure --Chemical fertilizer equipmentGB6479-8610, 20G, Q345 ... , 12Cr2MoISO 9329-2-1997 ASTM A161-94Seamless steel tubesfor petroleum crackingGB9948-8610, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo ...