Galvanized square pipe is a hollow square section steel pipe with a square cross-sectional shape and size made by cold bending hot-rolled or cold-rolled galvanized strip steel or galvanized coil steel, and then high-frequency welding. It is mainly used for curtain walls, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automotive chassis, airports, etc.