Polypropylene silent drainage pipe is a pipe product that can replace flexible cast iron pipes in the field of building drainage pipes. It overcomes the shortcomings of the latter such as its inability to resist acid and alkali corrosion. This product adopts a three-layer extrusion production process. The raw materials are recyclable, environmentally friendly, impact-resistant polypropylene resin and special sound-absorbing materials. After modification, this material has good degradation properties. Noise-quiet performance, chemical corrosion resistance, recyclability and heat resistance. This pipe is widely used in the construction field and can be used for drainage and sewage in office buildings, high-end apartments, hospitals, medical departments, nursing homes, embassies, schools, high-end residences and industrial buildings.