... -X80, Q235 Standard: ASTM, API, BS, JIS, GB, DIN Brand Name: YF SSAW STEEL PIPE SpecificationsChina StandardSteel ... GradeStandardseamless steel tubesand pipesfor structural purpose GB/T8162-199910, 20, 35, 45, 40Mn2, 45Mn2, ... 1994JIS G3444-1994Seamless steel tubes and pipes forliquid service GB/T8163-199910, 20, Q295, Q345ASTM A53-98ASTM ...