Crosslinking polyethylene pipe insulation, good stability yellow leather jacket pipe, if artificial ultraviolet irradiation reached 300 hours, no change in the surface layer of polyurethane tube black leather jacket, long service life. Corrosion resistance: polyethylene pipe insulation can withstand a variety of chemicals, after soaking the basic jacket tube deformation, 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. When pyrolysis, to produce co2 and h2o. High density polyethylene polyurethane foam insulation tubes: a certain corrosion resistance, and has good insulation properties. Selection of second degree inorganic zinc primer (temperature ≥400 ℃) anti-corrosion coatings, pipes port selection polyethylene film or three PE cold sealing tapes, insulation material multi-layer bandaging wrong seam, effectively reducing the heat loss, while using Coat surface of the control measures, so that the temperature control jacket coating is guaranteed. It features: low heat loss pipe black and yellow leather jacket, energy saving. Corrosion, good insulation properties, long service life.