... -X70,10#-45#, etc api spec 5ct oil casing and tubingProfessional manufacture and seller of the erw steel pipe.Some detailed information:1 ... Material: Q195, Q235, Q345, X42, X46, X52, X56, X60, X65, X70, 10#, 20#, 45#, etc3. Certificate: API 5L, ISO 90014. outside diameter ... -1985,GB/T3091-2001,EN39,BS1139MaterialsQ195, Q215, Q235, Q345, X42, X46, X52, X56, X60, X65, X70, 10#, 20#, 45#, etcProduct ...