Prefabricated buried thermal insulation pipe by the transportation medium of the steel pipe, polyurethane rigid foam pipe insulation layer and high-density polyethylene outer protection pipe closely combined and become.
Prefabricated buried insulation pipe is mainly composed of four parts:
1, the work of the steel pipe: according to the technical requirements of the transport medium, respectively, the use of seamless steel pipe, double-sided submerged arc spiral welded steel pipe. Prefabricated buried insulated pipe by the transport medium of steel pipe, polyurethane rigid foam pipe insulation and high-density polyethylene outer protection pipe closely combined and become.
2, insulation layer: rigid polyurethane foam. New insulation layer selected 20mm ~ 30mm aerogel blanket and external polyurethane high-pressure foaming skills made. With high-pressure foaming machine in the steel pipe in the cavity formed between the outer layer of rigid polyurethane foam liquid injected into a one-time and become. That is commonly known as the "tube in the tube foaming process". Its role is waterproof, the second is thermal insulation, the third is to support the self-weight of the heat network. When the transport medium temperature: -50 ℃ -120 ℃, the choice of rigid polyurethane urethane foam as a thermal insulation layer.
3, maintenance shell: high-density polyethylene or fiberglass. Prefabricated into a certain wall thickness of black (yellow) plastic pipe, its role is to maintain the polyurethane insulation layer from mechanical damage to hard objects, the second is anti-corrosion waterproof. Advanced equipment, excellent skills, scientific management mode, and perfect quality assurance system, as well as reasonable price.
4, leakage alarm line: manufacturing high temperature prefabricated direct buried thermal insulation pipe, in close proximity to the steel pipe insulation layer buried alarm line. Once the pipe leakage occurs somewhere, through the alarm line conduction in the special detection instrument alarm, and can show the exact location and degree of leakage, in order to notify the maintenance personnel to quickly deal with the leakage of the pipe section, to ensure the safe operation of the heating pipe network.
Prefabricated direct burial heat preservation pipeline can be buried in 0.6-1.2 meters of permafrost layer heat loss than ordinary pipeline can be reduced by more than 40%, the service life of the work than the other thermal insulation and anti-corrosion materials to improve the 3-5 times more than the life can reach 30-50 years.
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