Polyurethane foam insulation is today considered the most effective, since this material has the lowest coefficient of thermal conductivity, and also has excellent waterproofing properties. The latter characteristic is due to the presence of 99 percent closed pores in the material. PUF insulation is neutral to chemicals, alkaline environments and acidic compounds. It belongs to the flammability class G2 and has a high resistance to external influences.
general description
Rigid polyurethane foam has excellent heat-saving qualities with a small layer thickness. Due to these properties, it is suitable for solving professional thermal insulation tasks, which, for economic and technical reasons, suggest optimal energy savings. The water absorption of the material does not exceed 1.2-2.1% of the total volume. Insulation is difficult to burn even with direct exposure to fire.
PPU insulation has a low weight, which varies up to 60 kilograms per cubic meter. It is characterized by excellent strength and corrosion protection of metal structures. During installation, there is no need to use additional fasteners; cold bridges are not formed in the process . It is possible to isolate structures of any configuration and size with this material.
Durability
PPU insulation is durable, due to the fact that the material is not subject to decay and is not allowed under the influence of seasonal fluctuations in humidity and temperature. It is impossible not to mention the high environmental friendliness, thus, according to hygienic standards, the material can be used in cold equipment, which is intended for storage of food products.
Isolation is carried out using the technology of pouring polyurethane foam into a mold, with the help of which it is possible to form blocks called shells. They are used for arranging pipelines, making sandwich panels and plates. Polyurethane foam can be sprayed on any materials such as metal, wood, brick, glass, as well as concrete. In this case, the surface configuration does not matter.
Production of pipes with foam insulation
Polyurethane foam insulation, the production of which will be described below, is used in the manufacture of pipes requiring special protection. The result is a thermo-hydroinsulated product, which is manufactured according to GOST 30732-2006. In this case, polyurethane foam is used as the material of thermal insulation, while protection against moisture is guaranteed by the presence of a polyethylene layer. Such pipes are intended for the arrangement of heating mains, the installation of which is carried out underground. In the production process of such three-layer systems, high-quality steel is used, with the help of which the coolant will be transported.
Products are protected by a polyurethane foam layer, which completely eliminates heat loss. Steel and polyurethane foam are protected from groundwater, which is ensured by the presence of a special cover, which is made of polyethylene. Steel pipes in polyurethane foam insulation can be of two types, each of which involves the use of its own thickness of the insulation layer. The first type is used for installation in central regions, the conditions of which differ in a temperate climate. The second type is designed for operation in especially low temperatures, as for the northern regions. PPU-insulation (shell) in the production process is equipped with a UEC system, which allows timely detection of damage during operation. It allows you to control the humidity of the insulation layer, signaling when the level rises.
PPU prices
PPU-insulation, the price of which is presented below, may be the only right solution if necessary, pipe insulation. Thus, if you need an additional system, then with a pipe diameter of 507 millimeters, a wall thickness of 3.5 millimeters and a shell diameter of 125 millimeters, the price of insulation without a steel pipe per linear meter will be 376 rubles. With an increase in the above parameters to 89x3.5x160 millimeters, the price increases to 552 rubles. The impressive dimensions, equal to 630x8x800, suggest a cost of 8600 rubles.
Positive sides of pipes in polyurethane foam insulation
If you decide to isolate the pipes by applying polyurethane foam, you can count on the high-tech characteristics of the material. Among them, we can distinguish an insignificant coefficient of thermal conductivity, which is 0.027 W / μk. It should be noted and strength, as well as resistance to corrosion. PPU will protect the steel pipe better than reinforced concrete or bitumen perlite. It is not necessary to apply a corrosion-resistant coating to the steel surface, which will provide a more impressive heat preservation than insulation made of mineral wool. After carrying out such work, the pipes will be able to last for 25 years or more. This is several times longer than the time allotted to pipes without proper treatment. If you have a UEC system, you will be able to control the integrity of the product during operation, excluding earthwork. It is worth highlighting the economic advantages, which are expressed in the fact that the use of pipes with polyurethane foam insulation reduces the installation time of heating networks by three times, reduces maintenance costs by 9 times, but as for repair work, they will be cheaper by 3 times .
Conclusion
If you use insulated pipes in advance as described above, you can significantly reduce the cost of construction and subsequent operation. You will have the opportunity to minimize the loss of degrees of heat, which when using such pipes is 2%. Products in polyurethane foam insulation can be operated at impressive temperature ranges that range from -80 to +130 degrees, which is very suitable for difficult conditions in some regions of Russia.