In 2024, the project will be undertaken by a heating company with the aim of relocating the urban heating pipeline. The main materials used are our company's polyethylene outer sheath, rigid polyurethane prefabricated buried insulation pipes, and related materials such as matching pipe fittings and joints. The project mainly implements the upgrading and renovation of the centralized heating pipeline network, which can not only significantly improve heating efficiency and reduce safety hazards, but also effectively save energy, reduce environmental pollution, and optimize the urban energy structure.