carbon steel seamless pipe 10#, 20#, 45#, 16Mn, Q235, Q345, Q195 O.D.: 20-508mm W.T.:1.8-100mm or more ... carbon steel seamless pipe1) Material: 10#, 20#, 45#, 16Mn, Q235, Q345, Q1952) Standards: ASTM A53, ASTM A106, API 5L, APL 5CT, ASTM ... Application: Petroleum,chemical,power,gas,water,metallurgy,shipbuilding,construction,etc.9) Packing: Standard export package or as per clients' requirements ...