Crosslinking polyethylene pipe insulation and high stability, if the ultraviolet irradiation reached 300 hours of artificial black jacket polyurethane insulation pipes, there is no change in the surface layer of pipe insulation, long service life. Corrosion resistance: polyethylene pipe insulation can withstand a variety of chemicals, after soaking the basic deformation temperature steam buried pipe insulation, no cracks, which can be widely used in chemical pipelines, tank insulation. Low temperature resistance: under high temperature, polyethylene pipe insulation structure is not damaged, no distortion, no cracking. Non-toxic: polyethylene pipe insulation does not have any toxic substances. Polyurethane foam insulation pipes decomposition at high temperatures, produce co2 and h2o. Prefabricated buried pipe insulation that is buried in the wall or in advance of one underground pipe insulation, it is different from other utility pipes, buried it in the first place is not in use, but for the future in particular case in use, some lines such as housing construction, when not turned on, it can be turned on by prefabricated buried pipe insulation in the future, this is a manifestation of the wisdom of building designers, but also the development of the construction industry cumulative experience obtained.