Galvanized steel pipes are焊接 pipes with a hot-dipped or electro-galvanized zinc coating on the surface. The galvanizing increases the corrosion resistance of the pipes, extending their service life. Galvanized pipes have a wide range of applications, including not only general low-pressure fluid pipelines for water, gas, oil, etc., but also as oil well pipes and oil pipelines in the oil industry, particularly offshore oil fields. They are also used for oil heaters, condensers, and cooling tubes in chemical coking equipment, as well as for pile tubes in bridges and support pipes in mine tunnels.