... of our company is made from quality sheets through bending, forming, automatic welding, hot dip galvanization and powder coating. We ... Auto-closed up machine, submerged arc welding machine and powder coating line, and our workmanship and quality control was ... 2002 or American standard ASTM A123, IS: 2626-1985.Powder coatingPure polyester powder painting, color is optional according to RAL Color standard ...