Large diameter drainage steel pipes have a larger inner diameter, which can effectively increase drainage capacity and flow rate, meeting the needs of high flow drainage. Made of high-quality steel, it has high strength and rigidity, and can withstand large pressures and loads, ensuring the stable operation of the drainage system. After anti-corrosion treatment (such as coating with epoxy coal tar, hot-dip galvanizing, etc.), it can effectively resist corrosion and chemical erosion, and extend its service life. Large diameter drainage steel pipes are usually installed using spiral structures or flange connections, with tight connections and convenient installation.