Galvanized square pipes are divided into hot-dip galvanized square pipes and cold-dip galvanized square pipes according to the production process. They have excellent corrosion resistance and mechanical properties, high strength, good plasticity and toughness, weldable, easy to install, light weight, and corrosion resistance. Strong, easy to connect, beautiful appearance, mainly used in construction and machinery manufacturing, as well as solar power generation brackets, steel structure engineering, power engineering, shipbuilding, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc.