round steel pipe for construction material
1.Specification: 351 mm---1220 mm. 2.Wall thickness:7---40mm, 3.The length:6-12.8m. 4.Material quality: Q235,Q345.20#.Q420.X42-70 5.The standards" GB/T3091-2008, GB/T9711.1-1997, API5L.
1.Specification: 351 mm---1220 mm. 2.Wall thickness:7---40mm, 3.The length:6-12.8m. 4.Material quality: Q235,Q345.20#.Q420.X42-70 5.The standards" GB/T3091-2008, GB/T9711.1-1997, API5L.
