... b carbon steel pipe 10#, 20#, 45#, 16Mn, Q235, Q345, Q195 O.D.: 20-508mm W.T.:1.8-100mm or more precision astm ... b carbon steel pipe1) Material: 10#, 20#, 45#, 16Mn, Q235, Q345, Q1952) Standards: ASTM A53, ASTM A106, API 5L, APL 5CT, ASTM A519, and ASTM ... apply to petroleum, chemical industry, electric power, boiler, high temperature resistant, low temperature resistant, etc..12) Processing Technology ...