High temperature prefabricated pipe insulation is made steel pipes, steel sheathed glass, fiberglass shell composition, its features are: high temperature insulation layer also includes a lubricating layer of elastomeric seals. The utility model effectively solve the urban central heating in 130 ℃ -600 ℃ high temperature heat transport prefabricated pipe insulation with insulation, sliding lubrication and waterproofing problems exposed pipe ends. High temperature prefabricated pipe insulation is mainly composed of four parts. (1) Pipe work: according to the technical requirements of the transmission medium were used seam steel pipe, seamless steel tubes, double-sided spiral submerged arc welded steel pipe. (2) Insulation layer: rigid polyurethane foam. (3) protective shell: high density polyethylene or fiberglass. (4) leakage alarm line: the manufacture of high temperature prefabricated pipe insulation, the insulation layer near the pipe, the embedded alarm line, once the pipeline leak occurred somewhere, conduction through the alarm line, can be detected in a dedicated instrument the alarm and show the exact location and extent of the size of the leak leaking to notify maintenance personnel to quickly deal with leaky pipe sections to ensure safe operation of the heating network. Prefabricated buried pipe insulation performance advantages of prefabricated buried pipe insulation pipe insulation than traditional way has a very outstanding advantages: 1, precast masonry buried pipe insulation does not require a huge trench, simply bury people underground pipe insulation, so greatly reducing the project area is conducive to environmental protection, reduced by more than about 50% of earth excavation, masonry and concrete to reduce the amount of civil engineering 90%. Meanwhile, pipe insulation and construction site trenching parallel, just live joints, can shorten the duration of about 50%. 2, good insulation properties, heat loss is only 25% of traditional pipe, the long run can save a lot of energy, significantly reducing energy costs. 3, has a strong waterproof and corrosion resistance, without attached trench can be directly buried in the ground or water, construction easily and quickly, and lower total cost. 4, at low temperatures also have good corrosion resistance and impact resistance, and can be directly buried underground permafrost. 5, the service life of up to 30-50 years, the proper installation and use can make the pipe network maintenance costs low. 6, you can set the alarm system, automatic leak detection pipe network failure, an accurate indication of fault location and automatic alarm. Prefabricated buried pipe insulation with high efficiency insulation, waterproof, anti-corrosion, thermal insulation, sound insulation, fire-retardant, cold, corrosion, volume light, high strength, fast and simple construction, is not afraid of plant thorn and other outstanding features, has become the construction, transport, petroleum, chemical, electrical, refrigeration and other industrial sectors insulation, waterproof plugging and sealing indispensable material. Buried pipe insulation for thermal indoor and outdoor pipes, central heating pipes, central air conditioning ducts, chemical, pharmaceutical and other industrial pipes, cold engineering, pipeline engineering, lose steam and other pipeline projects. Polyurethane foam insulation tubes since the thirties polyurethane synthetic material since birth, has been used as an excellent insulation material and rapid development, more and more extensive range of applications, but also because of its simple construction, energy-saving anti-corrosion effect is remarkable. Occupy all walks of life.