Prefabricated direct-buried insulated pipe features high-efficiency thermal insulation, waterproofing, corrosion resistance, heat insulation, sound insulation, flame retardancy, cold resistance, light bulk density, high strength, simple and rapid construction, and resistance to plant-root penetration. It has become an indispensable material for thermal insulation, waterproofing, leak sealing, and sealing in industrial sectors such as construction, transportation, petroleum, chemicals, electric power, and refrigeration. Prefabricated PU direct-buried insulated pipe is used for insulation and cold-preservation of various indoor and outdoor pipelines, district heating pipelines, central air-conditioning pipelines, and industrial pipelines in chemicals and pharmaceuticals, as well as oil-transmission and steam-transmission pipeline projects. Since the birth of PU synthetic materials in the 1930s, prefabricated PU direct-buried insulated pipe has developed rapidly as an excellent thermal insulation material, with an ever-wider range of applications, simple construction, and significant energy-saving and anti-corrosion effects.

　　Applications of prefabricated direct-buried insulated pipe: Prefabricated PU direct-buried insulated pipe is widely used in liquid and gas transmission networks, chemical-pipeline insulation projects, petroleum and chemical industries, district-heating networks, central air-conditioning and ventilation ducts, and municipal works. Prefabricated PU direct-buried insulated pipe is a prefabricated direct-buried insulated pipe with good thermal insulation, greater safety and reliability, and low project cost. It not only offers advanced technology and practical performance that traditional trench and overhead piping can hardly match, but also delivers significant social and economic benefits, and is an effective measure for energy saving in heat supply.

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