... so on Standard:BS,ASTM,GB Mill Price Good quality Square Pipe1)Material: Q195/Q215/Q235,Q345,20#,45# etc.2 ... )Surface: Galvanized or naked as customers' need;5)Product Type: Square pipe, Rectangular tubes, ERW tubes, Seamless &Welded steel pipe, Galvanized ... threads,swaging,punch a hole ,flat squazzing etc. We also can do processing to the Square Pipe.Update Date:2011/10/26 ...