Galvanized steel pipes are welded steel pipes with hot-dip galvanized layers on the surface. Galvanizing can increase the corrosion resistance of the steel pipe and prolong its service life. Galvanized pipe has a wide range of uses. In addition to line pipes for water, gas, oil and other general low-pressure fluids, it is also used as oil well pipes in the petroleum industry, especially offshore oilfields, and oil heaters and condensing coolers for chemical coking equipment. , Coal distillation wash oil exchanger pipes, as well as trestle pipe piles, mine tunnel support frame pipes and structural steel pipes, etc.