Galvanized steel pipes with a hot-dip or electro-galvanized zinc coating on the surface. The galvanizing enhances the anti-corrosion ability of the pipes, extending their service life. Galvanized pipes have a wide range of applications, including general low-pressure fluid pipelines for water, gas, oil, etc., as well as oil well pipes and oil pipelines in the petroleum industry, particularly for offshore oil fields. They are also used for oil heaters, condensers, and cooling tubes in chemical and coking equipment, as well as for pile tubes in bridges and support tubes in mine tunnels.