Galvanized steel pipe, also known as hot-dip galvanized steel pipe, is a welded steel pipe with a hot-dip galvanized or electro-galvanized layer on the surface, which can enhance the corrosion resistance of the steel pipe and improve the reuse rate of the steel pipe. Galvanized steel pipes can be used as line pipes for general low-pressure fluids such as water and gas, petroleum industry, trestle pipe piles, support pipes for mine tunnels, etc.