... steel oil pipe API seamless steel oil pipe1)material:10#&20#carbon steel2)size:133*5mm3)Round section shap4) ... A106 ,ASTM A53 , ASTM A179 ,ANSI B36.10, GB 3087, GB/T 8162 ,GB/T8163 10# 20#, ,3.Outer Diameter2-20 mm4. ... ; With or without protecting caps as percustomer's requirements;10.MaterialA53(A,B), A106(B,C) Q235B,Q345B,16Mn ... , 10#.20#, Gr.B,X46,X52,X56,X60,X65, etc11 ...