... purposeASTN A519-98 JIS G3441-1994 JIS G3444-1994Seamless steel tubes and pipes forGB/T8163-199910, 20, Q295, Q345ASTM A53 ... 1629-1984seamless steel tubesAPI SPEC 5CTJ55, N80APIand pipesfor casingSeamless steel tubes forAPE SPEC 5LA, B, X42APIoil casing andtubing in oil ... -8610, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988for petroleum cracking A335 GR P11 Alloy ANSI B16.25 steel Pipes