Polyurethane insulation pipe components: structural mechanism 1, coating: protective outer steel to avoid corrosion corrosion steel pipe insulation, steel pipe to extend service life. 2, the outer jacket pipe: groundwater protection insulation from erosion, supporting the work of the tube and can withstand external loads, to ensure normal operation of the working tube. 3, polyurethane foam layer: to ensure that the medium temperature district heating pipe insulation, ensure the outer protective tube surface at constant temperature. Prefabricated buried pipe insulation manufacturers such pipelines and low cost, but the effect is a doubling of heating pipe insulation tubes, so quickly spread up the market, advanced technology such pipelines, high performance, but also saves space and resources, damage to the environment is also reduced to a minimum, it is the crystallization of our science and technology, the development of our human society is not a small step forward.