the corrosion resistance of steel pipes and prolong their service life. Galvanized pipes are widely used. In addition to being
used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil
pipelines in the petroleum industry, especially offshore oil fields, and oil heaters and condensation pipes for chemical coking
equipment. Pipes for coolers, coal distillation washing oil exchangers, trestle piles, and support pipes for mine tunnels, etc.
