As we all know, the square tube is generally made of steel or steel plate welding. The specific production process process is as follows:
Raw material preparation: use steel rolls, welded wires and welds as raw materials. These raw materials must be strictly chemically inspected before investment.
Bring steel head and tail docking: use single -silk or dual -wire buried arc welding, and then rolls into a galvanized square tube. After rolling into a square tube, automatic buried arc welding will also be used to replenish welding.
Pre -forming treatment: Bringing steel is smooth, cut, planed, and surface cleaning and transportation.
