carbon steel seamless pipe 10#, 20#, 45#, 16Mn, Q235, Q345, Q195 O.D.: 20- ... low price carbon steel seamless pipe1) Material: 10#, 20#, 45#, 16Mn, Q235, Q345, Q1952) Standards: ASTM A53, ASTM A106, API 5L, APL 5CT ... 11)Application: apply to petroleum, chemical industry, electric power, boiler, high temperature resistant, low temperature resistant, etc..12) Processing Technology: Cold ...