... ,ETC 2.Type:Welded tube, seamless tube 3.Size:thickness:1mm-25mm 4.Length:6m 2013 HIGH QUALITY AQUARE RETANGULAR STEEL ... PIPE 1.Grade:Q195, Q235B, Q235C, Q235D, Q345B, Q345C, ,ETC2.Type:Welded tube, ... Mechanical equipment, solar energy equipment, steel structure, auto part, bridge pile foundation, barrier, inner structure of vessel, decoration, ...