Polyethylene pipe insulation pipe part: Mechanisms of a barrier, reflective layer: to ensure that organic foam material does not enter the hard inorganic refractory layer; a reflective layer portion of high temperature heat. 2, inorganic rigid insulation layer: heat power pipeline pipe insulation, ensure the interface between temperature and the organic insulating layer, to ensure that the foam is not charring. 3, drag reduction layer: to ensure the free movement of expansion and contraction pipe work. 4, steel work: to ensure the normal flow of the transmission medium. Urban floor heating pipe insulation, prefabricated buried pipe insulation in construction spending share of consumption is not a lot of steel and their work can also be based on the need to transport the media to be set using a suitable pipe. This will greatly facilitate brought to the workers, with emphasis on the product and does not dissipate too much energy, so the public have a soft spot for this product.