One, Definition and structure of cast iron pipe;Cast iron pipe is a pipe made of cast iron material. It is usually composed of multiple pipe fittings, which can be connected with each other to form a complete pipeline system. The main material of this kind of pipeline is cast iron, which is famous for its high strength and good wear resistance. Cast iron pipe usually has strong endurance and compression resistance, which makes it an ideal choice for bearing heavy objects and withstanding high pressure.Second, Application of cast iron pipe;1.Architectural field: Cast iron pipes are widely used in the architectural field, especially in water supply and drainage systems. Because of its excellent corrosion resistance and aging resistance, cast iron pipe is an ideal choice to ensure the continuous stability of water supply system and the efficient operation of drainage system.2.Drainage system: Cast iron pipes play an important role in urban drainage system. Because of its firmness and durability, cast iron pipe can resist water pressure and soil pressure, effectively prevent water leakage and ensure the safe operation of urban drainage system..Durability: Cast iron pipe is made of cast iron material, which has excellent durability and corrosion resistance.Reliability: The cast iron pipe has firm structure, strong compression resistance, seamless connection and high sealing performance.