... structural purposeASTN A519-98 JIS G3441-1994 JIS G3444-1994Seamless steel tubes and pipes forGB/T8163-199910, 20, Q295, Q345ASTM A53-98liquid ... -1998 FIS G3454-1998 DIN 1629-1984seamless steel tubesAPI SPEC 5CTJ55, N80APIand pipesfor casingSeamless steel tubes forAPE SPEC 5LA, B, X42APIoil casing andtubing ...