‌‌ Galvanized steel pipe is a kind of steel pipe with galvanized layer added on the surface of steel, mainly used to prevent corrosion and rust of steel, thereby extending the service life. ‌ Galvanized steel pipe is divided into cold galvanized steel pipe and hot galvanized steel pipe two types. Cold galvanized steel pipes have been banned, while hot galvanized steel pipes have a wide range of applications in fire protection, electricity and highways. ‌