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Polyurethane insulation pipes are usually used in residential heating systems in urban residential areas. The water temperature generally does not exceed 120 degrees Celsius. Therefore, the methods used are one-time compensation and direct compensation. Look at the first kind of one-time compensation for direct burial laying. In the construction, it is necessary to use a compensator to compensate for a part of the total deformation of the pipeline. It is generally applicable to the working environment below 120 degrees Celsius and the working pressure is less than 1.6 MPa; The two kinds of uncompensated direct burial laying use the resistance between the soil and the outer pipe to fix the pipe. It is not necessary to additionally use the compensator and the fixture of the fixed bracket, and the construction is very convenient.
Polyurethane insulation pipe For large diameter, large length casing pipe insulation construction, due to factors such as the material formulation, production site conditions, etc., directly buried pipe manufacturers usually use horizontal direct infusion method to prepare. As the concrete application of the concrete method, the processing of polyurethane heat-insulating pipes can only have a sufficiently high effect of use under targeted processing, so as to ensure that the reference can reach a satisfactory level.
Polyurethane composite material has the characteristics of fine cell, good flow, sufficient toughness, high strength, and great physical property tolerance to meet various production process requirements of customers. It is suitable for different sizes of 720, 529, 325, 159, etc. On the pipeline, the density distribution is even, and at the same time adapting to the low-temperature environment construction, the special breed can resist low temperature below -200°C for a long time.
Easy construction:
The insulation layer—polyurethane foam can be applied outside the anticorrosion layer of the steel pipe by means of on-site pouring pots or prefabricated molding methods, and the method is simple and the work efficiency is quick.
Low thermal conductivity:
The thermal conductivity of the polyurethane insulation shell is the lowest in the insulation material, so the heat loss of the material can be minimized.
Waterproof, anti-corrosion, anti-aging:
Because the closed cell rate of polyurethane foam is over 92%, polyurethane foam is used as the insulating layer of the direct buried pipeline, which can not only play the role of thermal insulation, but also effectively prevent water, moisture and many other corrosive liquids, The soaking of gas prevents the growth and development of microorganisms.
Applicability:
Polyurethane foam can be firmly bonded with various materials, so that the insulation layer as a buried pipe hardly needs to consider the problem of the adhesion of the anti-corrosion layer. Polyurethane insulation temperature of +120 °C -196 °C, short time (more than ten hours) up to +190 °C. If the user needs long-term temperature of 190 degrees, we can use high-temperature materials according to user needs.