We are a professional manufacturer of ERW weled steel pipes, we can supply u high quality goods with best price. 1.OD:48-630mm 2.Thickness:3-18mm 3.Length:3-13m4.Material:Q195, Q235A, Q235B, Q345, ASTM A53/106, ASTMA500, ST375.Standards:GB/T3091-2001, GB/T9711.1-1997, GBT8162, GBT8163, GBT3087, API 5L 6.Applications:civil construction, petrochemical industry, light industry, mainly liquid ...