When arranging modern heating systems, special communications are used. The most common today are polypropylene pipes reinforced with fiberglass, the price of which can vary from 51 to 144 rubles. for pog. m. Technical characteristics of these products allow their use in the most high-temperature environments.
Main advantages
Fiberglass reinforced polypropylene pipe for heating has many positive characteristics. Among them:
- light weight;
- strength;
- lack of growth during operation.
For the reason that these products are low in weight, it is very convenient to mount them in communication systems yourself. Among other things, their strength allows them to withstand sudden changes in temperature. Pipes have high flexibility. That is why with the help of them it is possible to equip arbitrarily complex systems. Mineral sediment does not build up on their inner surface over time, which can also be called a big plus.
The main minus
A fiberglass reinforced polypropylene pipe (for heating) has one significant minus. It is expressed in the limited temperature conditions during operation. It is equal to 95 ° C. If this limit is exceeded, and the temperature reaches 140 ° C, the pipeline system will simply melt. In order to eliminate such troubles, the manufacturer reinforces the product with metal.
For reference
Reinforcement is a way to strengthen communication systems. For this, aluminum is mainly used. It can be located both in the middle and inside. In the latter case, it is possible to achieve positive results, since there is a high probability that salt deposits will build up on the inner walls. Most often, plastic is reinforced with aluminum in the middle.
Characteristics of German reinforced pipes
The most common lately are polypropylene pipes. Reinforced 25 mm in diameter, for example, will cost 83 rubles. for pog. m. Recently, German pipes, which are reinforced with fiberglass in the center, are very popular. Such products have a significant coefficient of stretching. It is equal to = 0.009 mm / m. Pipes have thicker walls compared to products reinforced with aluminum foil.
They are suitable for arranging hot water systems and for heating systems, such as installing a heated floor or heating, as well as organizing water drainage. They can undergo pressure up to several atmospheres, as well as metal pressure pipes. The temperature of their working environment can reach 120 ° C, while the normative value is 95 ° C.
Key features of the new fiberglass reinforced PPRC polypropylene pipes
Fiberglass reinforced polypropylene pipe for heating has impressive characteristics. Among them is the density, which is 0.9 g / cm3 . It is also worth noting the melting point - 1490 ° C. The tensile strength varies from 34 to 35 N / mm, while the yield strength can be equal to 24 to 25 N / mm The linear expansion is 0.15 mm / m, but the thermal conductivity at 200 ° C is 0.24 W / m. The specific heat at the same temperature is 2 kJ / kg. Such pipes can be used not only for the arrangement of heating systems, but also for the operation of installations that use compressed air. Such products are suitable for pipeline networks used in agriculture and industry.
Characteristics of PP-R Three Layer Fiberglass Pipe
If you are interested in a polypropylene pipe reinforced with fiberglass for heating, then you can consider several manufacturers, for example, Italian, Czech, Turkish, German and Russian. In the first case, the pipes are able to operate at 20 bars. At the same time, Czech, Turkish, German and Russian products are designed for 25 bar in the first case. And 20 bar - in all the rest. The maximum working temperature of pipes of Italian, Czech, Turkish, German and Russian production is 950, 800, 950, 900 and 1100 ° C, respectively. Each of these products has the same lifetime, which is 50 years.
If we consider such pipes from the point of view of the outer diameter, then in the first case it can vary from 20 to 63, in the second - from 16 to 125, in the third - from 20 to 110, in the fourth - from 20 to 125, and in the fifth - from 20 to 110 mm. Such polypropylene pipes reinforced with fiberglass, the price of which justifies the characteristics, can be used for autonomous heating systems and hot water supply. To see in practice their best qualities, it is necessary to follow the manufacturer's recommendations, which are expressed in the exclusion of contact of the reinforcing middle layer with water. Among other things, during installation it is recommended to use a special trimmer.
Additional disadvantages
If you decide to install heating from polypropylene pipes, then you should familiarize yourself with their main disadvantages. They are expressed in the negative effect of ultraviolet radiation on products, as well as in linear expansion. The sun's rays aggressively affect the structure of polymers, so after laying they can not be left in the open air, products should be protected. Minus can be called linear expansion. It is twice as much compared to metal pipes. The latter feature leads to the need for reinforcement.
Products are manufactured by double extrusion. A thermoplastic polymer is applied to the reinforced cage under impressive pressure from the external and internal sides. In the air, plastics become hard. And in the end, it is possible to form a strong bond with the solid frame.
What else should you pay attention to?
Reinforced polypropylene pipes, the characteristics of which are presented in the article, have a strong frame in the form of fiberglass. Three-layer structures have an outer and inner layer made of polypropylene, as well as a reinforcing fiberglass layer. During the extrusion process, materials are sintered into the crust and form a solid pipe body. Such products are more plastic, and their diameter can reach 125 mm.