Foam insulation. Production of pipes in polyurethane insulation

The insulation of polyurethane foam is now considered to be 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 of the closed pores in the composition of the material. FPU insulation is neutral to the effects of chemicals, alkaline media and acidic compounds. It belongs to the class of flammability G2 and has a high resistance to external influences.

general description

Rigid polyurethane foam has excellent heat-saving properties with insignificant 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.

The insulation of the PPU has a negligible weight, which varies up to 60 kilograms per cubic meter. It is characterized by excellent strength and corrosion protection of metal structures. When installing, there is no need to use additional fasteners, in the process, cold bridges are not formed . Isolate with this material can design any configuration and size.

Durability

The insulation of polyurethane foam is characterized by its durability, which is due to the fact that the material is not rotted and is not allowed under the influence of seasonal variations in humidity and temperature. We can not fail to mention the high environmental friendliness, so, hygienic standards, the material can be used in cold technology, which is intended for storage of food products.

The insulation is made by the technology of pouring the polyurethane foam into a mold, through which it is possible to form blocks called shells. They are used for the arrangement of pipelines, the production of sandwich panels and slabs. Polyurethane foam can be sprayed onto any materials like metal, wood, brick, glass, and concrete. In this case, the configuration of the surface does not matter.

Manufacture of pipes with polyurethane insulation

PPU insulation, the manufacture of which will be described below, is used in the manufacture of pipes requiring special protection. As a result, a thermally insulated product is produced, which is manufactured in accordance with GOST 30732-2006. As a material for thermal insulation in this case, polyurethane foam is used, whereas protection from moisture is guaranteed by the presence of a polyethylene layer. Such pipes are intended for arrangement of heating mains, the installation of which is carried out underground. In the production of such three-layer systems, high-quality steel is used, through which the transportation of the coolant will be carried out.

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 PPU insulation can be of two types, each of which assumes the use of its thickness of the insulation layer. The first type is used for installation in central regions, the conditions of which are characterized by a temperate climate. The second type is designed for operation in conditions of especially low temperatures, as for the northern regions. PPU-insulation (shell) in the production process is provided with a system of DCS, which allows timely detection of the resulting damage during operation. It allows you to control the moisture of the insulation layer, signaling when the level is raised.

PRP prices

PPU insulation, the price of which is presented below, can be the only correct solution if it is necessary to insulate the 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 insulation price without a steel pipe per running meter will be 376 rubles. With an increase in the above parameters to 89x3.5x160 millimeters, the price increases to 552 rubles. Impressive dimensions, equal to 630h8h800, assume a cost of 8600 rubles.

Positive sides of pipes in PPU insulation

If you decide to insulate pipes using polyurethane foam, you can count on high-tech material characteristics. Among them, one can single out an insignificant coefficient of thermal conductivity, which is 0.027 W / m. It should be noted and strength, as well as resistance to corrosion. PPU will protect the steel pipe better than armobenobeton or bitumen. On the steel surface, it will not be necessary to apply an anticorrosive coating, 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 and more. This is several times longer than the time that is allocated to the pipes without proper processing. If there is an ODC system, you will be able to control the integrity of the product during operation, excluding the excavation work. It is worth highlighting the economic advantages that are expressed in the fact that the use of pipes with PPU insulation shortens the terms of installation of heating networks by three times, reduces maintenance costs by 9 times, and as for repair work, they will be cheaper by 3 times .

Conclusion

If you use pre-insulated pipes in the manner described above, you can significantly reduce the cost of construction and subsequent operation. You will have the opportunity to minimize the loss of heat degrees, which when using such pipes are 2%. Products in PPU insulation can be operated with impressive temperature ranges that range from -80 to +130 degrees, which is very suitable for difficult conditions in some regions of Russia.