Corrosion pipe insulation performance advantages: 1, good insulation properties, heat loss is only 25% of the traditional pipe, long run can save a lot of energy, significantly reduce energy costs. 2, highly waterproof and resistant to corrosion pipe insulation, without attached trench heating pipe insulation, can be directly buried in the ground or water, construction easily and quickly, and lower total cost. 3, at low temperatures also have good corrosion resistance and impact resistance, and can be directly buried underground permafrost. 4, the service life of up to 30 - 50 years of air-conditioning pipe insulation, proper installation and use can make the pipe network maintenance costs low. 5, you can set the alarm system insulation shell, automatic detection of pipeline leakage fault, an accurate indication of the fault location and automatic alarm. Polyurethane insulation pipe production technology district heating supply and return water with the introduction of its structure is generally made of high density polyethylene outer sheath or outer sheath fiberglass, rigid polyurethane foam insulation, interior steel composition. There are other structures in accordance with the actual requirements of the police line, such as stents, you may also need other insulation materials composite layer and so on. HDPE outer sheath of high density polyethylene outer sheath tube is divided into "two-step" and "one-step" production process: