Prefabricated PU direct-buried insulated pipe features high-efficiency thermal insulation, waterproofing, corrosion resistance, heat insulation, sound insulation, flame retardancy, cold resistance, light weight, 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 fields such as construction, transportation, petroleum, chemicals, electric power, and refrigeration. Prefabricated PU direct-buried insulated pipe is used for insulation and cold-preservation of indoor and outdoor pipelines, district heating pipes, central air-conditioning pipes, 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 insulation material, with an ever-wider range of applications, simple construction, and significant energy-saving and anti-corrosion effects. Today, black-jacketed direct-buried LSAW pipe is briefly introduced together with the applications of prefabricated PU direct-buried insulated pipe.

　　Applications of Prefabricated PU Direct-Buried Insulated Pipe:

　　Prefabricated PU direct-buried insulated pipes are widely used in liquid and gas transmission networks, chemical pipeline insulation projects, petroleum, chemical industry, district heating and heating networks, central air-conditioning ventilation ducts, municipal engineering, etc. It is a direct-buried prefabricated insulated pipe with good insulation performance, safety and reliability, and low project cost.

　　Prefabricated PU direct-buried insulated pipe not only offers advanced technology and practical performance unmatched by conventional trench or overhead piping, but also delivers significant social and economic benefits as an effective energy-saving measure.