... A519-98 JIS G3441-1994 JIS G3444-1994Seamless steel tubes and pipes forliquid serviceGB/T8163-199910, 20, Q295 ... , 20ASTM A179, ASTM A192 ASTM SA179,SA192, BS3059Seamless Steel Tubes for high pressure --Chemical fertilizer equipmentGB6479-8610, 20G, Q345, ... -94Seamless steel tubesfor petroleum crackingGB9948-8610, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988 stainless seamless steel tube 300 ...