Galvanized square tubes are widely used in construction, machinery, coal, chemical industry, railway vehicles, automobile vehicles, automobile industry, roads, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, and mining machinery manufacturing. The surface of galvanized square pipe is hot-dip galvanized or galvanized welded steel pipe. Hot dip galvanizing can improve the corrosion resistance of steel pipes and prolong their service life. Galvanized square pipes are widely used. In addition to pipes for low pressure fluids such as water, gas and oil, they are also used in the petroleum industry, especially for offshore oil wells, pipes, pipes, bridge piles for bridges, and pipe supports for mining tunnels.