... API, BS, JIS, GB, DIN BG 24" and 20" ERW PIPE SpecificationsChina StandardSteel GradeStandardseamless steel tubesand pipesfor structural purpose GB ... A519-98JIS G3441-1994JIS G3444-1994Seamless steel tubes and pipes forliquid service GB/T8163-199910, 20, Q295, Q345ASTM ... in oil wellsAPE SPEC 5LA, B, X42APISeamles Steel Tubesand Pipes forHigh Pressure Boiler GB5310-199520G, 20MnG, 25MnG, 15MoG, 20MoG ...