Performance analysis of polyurethane direct buried insulation pipe? Dacheng Xiangdong Insulation Refractory Material Factory 13473696600 15731614448
The polyurethane insulation pipe is composed of a working steel pipe, a rigid polyurethane foam insulation layer and a high-density polyethylene outer protection pipe. The polyethylene outer protective tube is made of high-density polyethylene material, which can ensure the damage of the pipe material during the transportation installation and use without external factors. The insulation layer material is a rigid polyurethane foam with a density greater than 60kg/m3. The foam fully fills the gap between the steel pipe and the outer protective pipe, and has a certain viscosity, so that the steel pipe, the outer casing and the thermal insulation layer form a firm whole.
The heating characteristics of polyurethane direct buried insulation pipe Since the birth of the rigid polyurethane foam, it has been developed as an excellent thermal insulation material for a long time. Its application range is more and more extensive, and its construction is simple. The energy-saving and anti-corrosion effect is obvious, and various pipes such as heating, cooling, oil transportation, and gas transmission are widely used.
The construction of the polyurethane direct-buried insulation pipe is convenient, and the insulation layer-polyurethane hard foam is applied to the anti-corrosion layer of the steel pipe by on-site irrigation or pre-forming, and the method is simple and quick in work efficiency. The thermal conductivity is small, and the thermal conductivity of the polyurethane foam is the lowest among all insulation materials, thus minimizing the heat loss of the material. Waterproof, anti-corrosion, anti-aging, polyurethane foam has a closed cell ratio of over 92%. The use of rigid polyurethane foam as a thermal insulation layer for direct buried pipes not only serves as insulation, but also effectively prevents water and moisture. And the soaking of other kinds of aggressive liquids and gases to prevent the growth and development of microorganisms.
The polyurethane direct buried insulation pipe has strong adaptability, and the polyurethane foam can be firmly bonded with various materials, and solves the frustration of the high water level in the alpine region, such as the coastal, pond marsh, saline-alkali areas and the special heat pipes of the river crossing, and Compared with traditional trench construction pipelines, infrastructure investment is low and economic benefits are high. Therefore, as the insulation layer of the polyurethane direct-buried insulation pipe, it is almost unnecessary to consider the problem that the anti-corrosion layer is bonded thereto. The polyurethane insulation layer has an adaptation temperature of +120 ° C to 196 ° C and a short time (10 hours) of +190 ° C. If the production temperature is 190 degrees, we can use high temperature materials according to the needs of users.
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