What are the advantages of directly buried polyurethane insulation pipe?

First, the heat loss is relatively low. At present, most of the directly buried pipelines in geothermal engineering in China generally choose rigid foam polyurethane insulation pipe, and its insulation effect is at least 4-9 times that of conventional insulation pipe. On the basis of high thermal conductivity and polyurethane foam, the water absorption rate of polyurethane insulation pipe can be kept below 0.2kg/m2, and the closed-cell rate is as high as 92%, which greatly reduces the heat loss of heating pipe. Therefore, the thermal conductivity and thermal insulation performance of polyurethane insulation pipe can meet the basic requirements of geothermal engineering. Second, the energy-saving and consumption-reducing polyurethane has good thermal insulation performance, and the heat loss is only 25% of that of the traditional pipeline. Long-term operation can save a lot of energy, thus reducing energy costs. Third, the insulation layer of polyurethane insulation pipe with good thermal insulation performance is usually closely connected with the steel pipe shell, with good thermal insulation performance and hard foam, which can well prevent the penetration of air and water. Fourth, good anti-corrosion performance Polyurethane directly buried insulation pipes usually have excellent anti-corrosion performance, and the water absorption rate of foam holes closed by polyurethane insulation pipes is very low. Therefore, it will not be damaged by air and water erosion. Good thermal insulation performance makes the construction life of polyurethane thermal insulation pipeline 3-4 times longer than that of traditional overhead laying and trench laying. V. Relatively few restrictive conditions Objectively speaking, the choice of polyurethane directly buried thermal insulation pipeline has obvious advantages in the construction process of geothermal engineering. The main reason is that the directly buried pipeline does not need to occupy too much trench area and can be buried directly below the surface. Therefore, it is not limited by the construction site area. When the polyurethane insulation pipeline is directly buried underground, it can save more than 50% of earthwork excavation and reduce at least 90% of civil engineering or concrete engineering. Therefore, compared with the previous construction method of thermal insulation pipeline, the actual construction period can be shortened by nearly 50%. Automatic alarm function of intransitive verbs Directly bury the leakage alarm line of polyurethane insulation pipe: When manufacturing polyurethane insulation pipe, bury an alarm line in the insulation layer near the steel pipe. Once a pipeline leaks, it can give an alarm on a special detector through the conduction of the alarm line, and display the exact location and degree of the leakage, so as to inform the maintenance personnel to deal with the leakage quickly and ensure the safe operation of the heating network.