PPU insulation today is considered the mosteffective, as 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 of closed pores in the composition of the material. PPU insulation is neutral to chemicals, alkaline media and acidic compounds. It belongs to the class of flammability G2 and has a high resistance to external influences.
general description
Hard polyurethane foam has excellent qualities.heat savings with a thin layer thickness. Due to these properties, it is suitable for solving professional heat insulation problems, 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 fire, even with direct exposure to fire.
PPU insulation is lightweight,which varies up to 60 kilograms per cubic meter. It is characterized by excellent durability and corrosion protection of metal structures. During installation, there is no need to use additional fasteners, the process does not form cold bridges. It is possible to isolate with the help of this material designs of any configuration and size.
Durability
PPU insulation is durable, whichdue to the fact that the material is not subject to rotting and is not allowed under the influence of seasonal fluctuations of humidity and temperature. Not to mention the high environmental friendliness, thus, according to hygienic standards, the material can be used in cold technology, which is intended for the storage of food products.
Isolation is made by the technology of pouring PU ina form with 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 by type of metal, wood, brick, glass, as well as concrete. The configuration of the surface is irrelevant.
Production of pipes with isolation from PPU
PU foam insulation, the production of which will be describedbelow, used in the manufacture of pipes that require special protection. The result is a heat-insulated product, which is made 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 arranging heating mains, which are installed underground. In the production process of such three-layer systems, high-grade steel is used, with the help of which coolant will be transported.
Products are protected by a polyurethane foam layer,which completely eliminates heat loss. Steel and polyurethane foam are protected from the effects of groundwater, which is ensured by the presence of a special cover, which is made of polyethylene. Steel pipes in PU 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, whose conditions differ in temperate climates. The second type is designed to operate in conditions of particularly low temperatures, with regard to the northern regions. The PUF insulation (shell) in the production process is supplied with a DCS system, which allows timely detection of damage occurring during operation. It allows you to control the humidity of the insulation layer, signaling with increasing levels.
Prices for PUF
PUF insulation, the price of which is presented belowmay be the only right decision when it is necessary to insulate pipes. 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 cost of insulation without a steel pipe per meter will be 376 rubles. With the increase of the above parameters to 89h3, 5h160 millimeters price increases to 552 rubles. Impressive dimensions, equal to 630x8x800, suggest the cost of 8600 rubles.
Positive sides of pipes in PU foam insulation
If you decide to insulate pipes byapplying polyurethane foam, you can count on the high-tech characteristics of the material. Among them, it is possible to single out an insignificant coefficient of thermal conductivity, which amounts to 0.027 W / μ. It should be noted, and strength, as well as resistance to corrosion. PPU will protect steel pipe better than armored concrete or bituminous perlite. It is not necessary to apply an anti-corrosion coating on the steel surface, which will provide a more impressive heat retention than mineral wool insulation. After such work, the pipes will be able to last for 25 years or more. This is several times longer than the time allowed for pipes without appropriate treatment. With the UEC system, you will be able to monitor the integrity of the product during operation, excluding excavation work. It is worth highlighting the economic advantages, which are expressed in the fact that the use of pipes with PU foam insulation reduces the installation time of heating networks by three times, reduces maintenance costs by 9 times, and as for the repair, they will be 3 times cheaper .
Conclusion
If used in advance isolatedpipes as described above, it is possible to 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 PU foam insulation can be operated at impressive temperature ranges, which range from -80 to +130 degrees, which is very suitable for difficult conditions in some regions of Russia.
