Thick-walled square pipes are widely used in foreign construction industry. They are used as roof trusses, purlins, trusses, rigid frames, wall frames, keels, roof panels, wall panels, floors, doors and windows, and even containers, pipes, cofferdams, steel sheet piles, Breakwaters, etc. In recent y

Today, the domestic galvanized rectangular pipe factory is still operating smoothly, and the market transaction situation has not improved significantly. It is understood that the domestic steel-making pig iron market has been halted or even shut down due to excessive pressure from individual iron p