For communication systems in a residential building, reliability and simplicity of design always come first. In order for the cold and hot water supply system to function normally in an apartment, house or country house, and for the heating equipment to work fully, it is necessary to lay the pipeline correctly and competently. Here the pipes come to the fore - an engineering and technological element on which the entire water and heat supply system is subsequently based. When choosing pipes for a heating system, you have to take into account literally every little detail, from technological parameters to the material used and manufacturing method.
The complexity of the task lies in the fact that today the consumer has at his disposal pipes for heating the most different types and types. , a new type of consumable material that is successfully used for laying household pipelines. for installation of a heating system, with fiberglass or reinforced with aluminum - this is the “know-how” of recent years. Cheap, reliable, practical and easy-to-use consumable material.
Do synthetic consumables meet the objectives of the heating system? How reliable are fiberglass-reinforced polypropylene pipes? How to make the right purchase? These questions need to be addressed in more detail.
What are reinforced polypropylene pipes
Life support communication systems that use metal pipes are becoming a thing of the past. Despite the fact that metal consumables are highly durable and quite reliable in operation, the high cost of the material and complex installation influenced the fact that interest in such materials has noticeably weakened at the everyday level. As an alternative metal pipes Consumers today are focusing on reinforced synthetic consumables.
During the manufacturing process of products, polypropylene is strengthened by adding special components to the structure. As a result, at the end we have a completely different, qualitatively new consumable material - reinforced polypropylene pipes. Reinforcement is traditional way mechanical strengthening of communications. Due to inclusion in the polypropylene channel synthetic fibers in the form of a braid, it was possible to significantly increase the strength and rigidity of the material. Reinforcement is performed both in the middle of the product itself and on the inside. Internal reinforcement is extremely rare, but the inclusion of an additional middle layer of fiberglass into the structure of the finished product is a fairly common technology.
On a note: reinforcement on the inner wall of the pipe is not advisable. There is a high probability of rapid blockages due to the formation of salt deposits on the walls of the internal channel. The quality of water used for domestic purposes, including heating, is not always ideal.
Having replaced metal pipes, reinforced polypropylene consumables have radically changed the entire technology of laying pipelines for heat supply systems. The synthetic material is not inferior to metal in strength, is resistant to corrosion processes and copes well with temperature changes.
We especially captivate the consumer by the fact that, reinforced and reinforced with fiberglass, they are suitable for heating any premises. Polypropylene consumables can effectively interact with almost any type of heating equipment and heating equipment.
The cost of such products is an order of magnitude less than the cost of metal, copper or metal-plastic pipelines. This aspect is especially important when it comes to organizing a heating system throughout the house. In houses and apartments large area, in two-story residential buildings, the use of synthetic reinforced channels makes it possible to literally entangle the entire building with a network of pipelines. Length of pipeline made from synthetic materials, in some cases reaches several hundred meters. With other products you won’t allow yourself such luxury, trying to save on every centimeter.
For reference: the length of the heat supply system in a private residential building with an area of 100 m2 is about 100 meters, including return. Compare the cost of reinforced polypropylene pipes required for laying a pipeline of this length and the price of metal products or metal-plastic.
Let's summarize. Reinforcement is carried out with the aim of giving the polypropylene pipe the necessary strength. Why is fiberglass used for this purpose? The answer is simple. The glass fiber inserted into the middle is impregnated with elastic plastic mass, creating a single whole together with the surrounding outer and outer layers of polypropylene. As a result, the required integrity of the product is achieved. By incorporating a layer of fiberglass into the pipe structure, it was possible to significantly reduce the thickness of the inner wall, while maintaining the main working diameter of the channel.
On a note: Aluminum-reinforced polypropylene pipes can delaminate over time. Frequent sudden changes in coolant temperature cause such a negative phenomenon.
Features of glass fiber reinforced polypropylene consumables
For home heating system the most important parameter– ease of use and long service life. The functionality of each component and element of a water heating system determines the level of comfort and degree of reliability of the equipment. What is most important when installing a heating system in a house? Durability and convenient operation. When installing a heating system in a house, we want to make sure that the entire complex of equipment works autonomously, without our participation.
They can reassure you in this regard. , taking into account thermal calculations and operating features will ensure long-term and uninterrupted operation of the system home heating. Reinforced synthetic consumables used in heating communications are designed for 20-25 years of service.
Resistance to corrosive processes, the ability to withstand high pressure and significant temperature changes make synthetic lines and communications very convenient and practical to use. The permissible temperature range for such material is: -10 0 C +90 0 C, which is especially important when configuring autonomous heating. Polypropylene with fiberglass is not afraid of freezing. When the coolant in the system freezes, synthetic lines, unlike metal products, retain their shape, structure and integrity.
Synthetic, fiberglass-reinforced pipes are an excellent dielectric, and when in contact with fire, polypropylene is non-toxic and decomposes into water vapor and carbon. Along with the listed features, synthetic water channels based on fiberglass have other advantages. Eg:
- simple, quick and convenient installation;
- laying pipes does not require special skills or specialization;
- the strength of the seams allows you to use even pieces of pipe in installation, minimizing waste;
- interchangeability of individual elements in case of pipeline damage;
- affordable price of material.
And the most important advantage that reinforced polypropylene pipes have is the absence of the effect of sagging of the pipeline.
Important! For conventional polypropylene pipes, the sagging effect is a significant disadvantage. Polymers tend to have high coefficient thermal expansion. Upon contact with a hot coolant, polymers acquire additional elasticity and begin to change their structure.
Fiberglass or aluminum give polypropylene pipes the necessary resistance when heated. Pipelines for hot water or heating systems withstand temperature loads without losing their basic technological parameters. In addition, reinforced synthetics and fittings are perfectly combined with any interior decoration options. The heating system pipeline can be laid inside the walls, significantly increasing the usable volume of the interior.
Types of reinforced polypropylene pipes. Product marking
At the moment, the market for consumables for heating systems is rich in choice. The product labeling deserves attention, thanks to which we can obtain all the necessary information about the operating parameters of the pipe and operational capabilities. For polypropylene reinforced pipes, marking plays a key role. Based on the information, we will be able to correctly and accurately select the required type and type of product.
Let's start with the classification of polypropylene pipes, which is based on the variety of products. Synthetic consumables are divided into the following types:
- The first type - products made from homopolypropylene, have the PPH index (H - homopolymer). This type is characterized by high strength. They are usually used in cold water systems.
- The second type is pipes that contain a block copolymer (B - block copolymer). These consumables are marked with PPB indices and can be used in low-temperature heating systems (warm water floors).
- The third type is the most common. The products are used for underfloor heating and hot water supply. Such PPR pipes are marked, where R is a random copolymer. Usually this type of product is made reinforced. The letter C is added to the existing PPR marking, indicating increased requirements for temperature surges (up to 95 0 C).
The European abbreviation PP corresponds to the Russian version PP, which means polypropylene.
Further, after the designations of the product’s belonging to the type of material, there are designations characterizing the value of the nominal operating pressure. PN indices are used for this purpose. At the domestic level, reinforced pipes with indexes PN20, PN25 are usually used for water supply and heating systems. These two types are optimally suited for heating systems, both for centralized heating options and in combination with individual heating devices. The difference is that products with the PN20 index are reinforced with fiberglass, while those with the PN25 index have an aluminum layer.
Important! Unlike conventional polypropylene consumables, both options, PN20 and PN25, have a low coefficient of thermal expansion. For products reinforced with fiberglass, this figure is 5-7% higher than for foil-clad polypropylene pipes.
The required quality and compliance of the product with the declared parameters can be obtained by purchasing original, branded products. Price is an aspect on the basis of which one can determine a fake from a branded consumable. Reinforcing component - glass fiber can be different colors, orange, blue, red or green. The color scheme does not play any role. Some manufacturers, in addition to existing markings, apply stripes along the surface of the pipe:
- red stripe, scope of use - pipelines with hot water or coolant;
- blue stripe, products are used for cold water supply;
- two colors – the versatility of the highway.
This is what the standard marking on the product looks like.
Conclusion. Pipe laying and installation features
Having an idea of what components are best for the heating system, it’s worth saying a few words about the features of laying polypropylene lines and the specifics of pipeline installation.
Using calculations, you can get an idea of what length of pipes you should buy and in what quantities. Already in the process of laying the pipeline, the material is cut into fragments in accordance with the required dimensions. Consumables are cut using special scissors.
Important! Polypropylene channels are cut quite easily, from here we can draw a conclusion. Transportation and installation finished products must be carried out taking precautions. Any significant mechanical force may damage the integrity of the product.
Where is the probability high? mechanical damage pipeline, it is better to install metal fragments.
It is believed that polypropylene pipes are environmentally friendly and safe, so the location of the pipeline can be chosen in accordance with technological needs. However, before installation, it is better to have on hand calculated data on the coolant supply speed, pressure force and heating temperature. The calculated data should not exceed the permissible operating parameters for the selected brand of product. Otherwise, a technological inconsistency may occur, resulting in an emergency.
The installation of the pipeline is carried out taking into account the coefficient of thermal expansion, which for consumables with fiberglass is slightly greater (5-6%) than for products with an aluminum insert. The cut fragments are connected into a single line using the diffuse soldering method, using fittings, couplings, angles, tees and adapters for connections and branches. Reinforced pipes are soldered in the same way as conventional polypropylene products. The material is easy to combine with metal elements that have a threaded connection.
At the moment, the price-quality ratio of polypropylene pipeline products is the best among other consumables. Strength, reliability and durability make it quite easy, without much skill or effort, to install a heating system pipeline in a house.
Any water-type heating system requires the presence of circuits through which coolant circulates. These pipe lines connect the boiler with all, even the most remote, heat exchange devices - heating radiators. As a result, in a building or even a large apartment, the overall system can take on a very complex branched form, and the length of the laid pipes can be tens or even hundreds of meters.
Not so long ago there was practically no alternative steel pipes VGP. But, you must admit, their acquisition, transportation and installation itself are very difficult, expensive and not accessible to everyone for independent execution. And, to be honest, such pipes have many other disadvantages. Another thing is inexpensive, lightweight, easy to install, and simply attractive polypropylene pipes. True, not all of their varieties are suitable for such purposes, due to the characteristics of the material used. But fiberglass-reinforced polypropylene pipes for heating will be an excellent option.
You might be interested in information about what types of and their benefits
In addition to them, polypropylene pipes are also produced with aluminum reinforcement, so in order to figure out which of them is better, it is worth comparing them. Only in this way will it be possible to evaluate and identify the characteristic features of different types of these products.
Why are reinforced polypropylene pipes needed for heating?
The heating system will be reliable in operation if you select the “right” pipes for it that meet certain requirements. These criteria include the resistance of products to high temperature and pressure loads. to the aggressive effects of the coolant circulating through them. It is especially important to take these requirements into account if the pipes and their connecting elements are planned to be installed in a system connected to the central heating supply.
In specialized stores you can find reinforced polypropylene pipes that have different wall thicknesses, are made from materials of different quality, and differ in resistance to high blood pressure and temperatures, ultraviolet exposure, having different coefficients of linear expansion. Therefore, if you decide to install a new circuit or replace the old pipes with polypropylene ones, you need to know the evaluation criteria that the materials used for these purposes must meet.
So, for the installation of a heating circuit, it is necessary to select pipes that meet a number of important requirements.
- The temperature of the coolant in the central heating system is usually 75–80 degrees, but sometimes it can reach higher values, close to 90–95 ºС. Therefore, when purchasing these products, you should choose them with a margin of thermal stability, that is, their characteristics must indicate a temperature of at least 95 degrees.
- Polypropylene is an excellent material for pipes, but it has a characteristic quality - too significant a coefficient of linear expansion with temperature changes (according to tabular data - 0.15 mm/m × ºС). A little? But what if we look at this matter “through the prism” of absolute values?
Let’s say the installation of the heating circuit was carried out at a temperature of +20 ºС. After starting the heating system, the temperature in the supply pipe is planned to be even just 75 ºС. So, we have a difference with an amplitude of + 55 degrees. With the above coefficient of thermal expansion, each meter of our contour will increase in length by 8.25 mm. Even on a relatively small straight line at 3 meters this will already give 2.5 centimeters of extension, not to mention longer sections. But this is already very serious!
As a result, pipes located openly become deformed, bend, and jump out of their fastening clips. Naturally, at the same time, internal stresses in their walls increase, connecting units are overloaded, and the tightness of threaded connections on fittings may be compromised. The system clearly loses not only the aesthetics of its appearance, but also its overall reliability.
What happens to such pipes if they are firmly embedded in the walls or floor? It is even difficult to imagine how large internal stresses their walls experience. It is clear that there is no question of any durability of such a heating circuit.
You might be interested in information about which is better -
But reinforced pipes have a coefficient of linear expansion that is almost five times less. With the same initial data, a three-meter section will lengthen by only 4.95 mm, which is not at all critical. Of course, this does not eliminate the need to compensate for linear expansion on very long sections, but the expansion joints themselves (loop or bellows) will be required significantly less, and they can be placed in places inaccessible to the naked eye.
- In addition to high temperatures, the central heating system is not characterized by pressure stability, since especially when starting test activities after summer season, in it, as a rule, uncontrolled surges occur, up to powerful water hammers. Therefore, pipes must be resistant to baric overloads, and only products reinforced with aluminum or fiberglass have such qualities to a much greater extent.
- The service life of pipes for heating systems declared by the manufacturer must be comparable to the durability of other devices and elements included in the overall circuit. And in this position, reinforced polypropylene pipes have a clear advantage.
- A good property of propylene is its inertness to the aggressive coolant environment, since the wall material should not be subject to corrosion and destructuring from the effects of various chemicals, the presence of which, alas, cannot be excluded in any way in the central heating system.
- The ideally smooth surfaces of the inner walls of polypropylene pipes make it possible to freely circulate coolant through the heating circuit.
- Polypropylene has the ability to muffle the sounds of coolant circulation inside the system, which distinguishes it from traditional steel. Fiberglass-reinforced pipes have this advantage to a more pronounced extent.
Marking of polypropylene pipes
Without exception, all polypropylene pipes must have alphanumeric markings on their surface, which indicate their main physical, technical and operational characteristics. When purchasing pipes, it is recommended to carefully study the markings so as not to make a mistake in choosing the best option.
For clarity, let's look at the markings using an example:
A– as a rule, the marking begins with the logo or name of the company of the material manufacturer. In any case, those companies that really enjoy authority in this area of production do not hesitate to put their name on each unit of their products. Well, if the manufacturer has been “modest” and nothing like this is indicated in the labeling, this should be a reason to think about whether it is worth purchasing such a product, whether it is a cheap imitation.
B– The following abbreviation refers to the structural structure of the pipe. The following notation options are usually found here:
— PPR - polypropylene pipe that does not have any internal reinforcement;
— PPR-FB-PPR - fiberglass reinforced pipe;
— PPR/PPR-GF/PPR or PPR-GF - pipe reinforced with composite material, which includes fiberglass and polypropylene;
— PPR-AL-PPR - pipe reinforced with aluminum foil.
- PP-RCT-AL-PPR - this complex abbreviation indicates that the pipe consists of several layers made of different materials. So PP-RCT - the inner one is a modified polypropylene with improved thermostatic properties, AL - the middle layer is aluminum foil, and PPR - the outer layer is polypropylene.
IN– The following designation, PN, is the type of pipe, which largely speaks about its operational characteristics and areas of possible purpose. The numbers indicate the nominal operating pressure in the system (in bars or technical atmospheres):
- PN-10 - such pipes can withstand a pressure of 10 bar, and can be used for cold water supply or, as an exception, for installing connections to heated floor circuits while maintaining appropriate temperature regime, since they are designed for temperatures not exceeding + 45 degrees.
— PN-16 - products are designed for cold and hot water supply with temperatures up to + 60 degrees and operating pressure up to 16 bar.
— PN-20 is the most popular option, since it can be called universal, since it is used for both hot and cold water supply, as well as for heating system circuits. Pipes with this marking can withstand temperatures of 95 degrees and pressures of up to 20 bar.
— PN-25 - such pipes are the most durable, withstand a pressure of 25 bar and a temperature of 95 degrees. They are used for installation in risers of heating and hot water supply systems, including for circuits connected to the central heating supply.
The main standard dimensional parameters of pipes according to this classification are presented in the table below:
| Ø Nr, mm | PN-25 | PN-20 | PN-16 | PN-10 | ||||
|---|---|---|---|---|---|---|---|---|
| Ø In, mm | TC, mm | Ø In, mm | TC, mm | Ø In, mm | TC, mm | Ø In, mm | TC, mm | |
| 16 | - | - | 10.6 | 2.7 | 11.6 | 2.2 | - | - |
| 20 | 13.2 | 3.4 | 13.2 | 3.4 | 14.4 | 2.8 | 16.2 | 1.9 |
| 25 | 16.6 | 4.2 | 16.6 | 4.2 | 18 | 3.5 | 20.4 | 2.3 |
| 32 | 21.2 | 3 | 21.2 | 5.4 | 23 | 4.4 | 26 | 3 |
| 40 | 26.6 | 3.7 | 26.6 | 6.7 | 28.8 | 5.5 | 32.6 | 3.7 |
| 50 | 33.2 | 4.6 | 33.2 | 8.4 | 36.2 | 6.9 | 40.8 | 4.6 |
| 63 | 42 | 5.8 | 42 | 10.5 | 45.6 | 8.4 | 51.4 | 5.8 |
| 75 | 50 | 6.9 | 50 | 12.5 | 54.2 | 10.3 | 61.2 | 6.9 |
| 90 | - | - | 60 | 15 | 65 | 12.3 | 73.6 | 8.2 |
| 110 | - | - | 73.2 | 18.4 | 79.6 | 15.1 | 90 | 10 |
| Ø No. – outside diameter pipes | ||||||||
| Ø External - Diameter of the internal channel of the pipe (nominal diameter) | ||||||||
| TS – pipe wall thickness | ||||||||
G— The next indicator is the outer diameter of the pipe and the thickness of its walls in millimeters.
D– Service class (the parameter is set by GOST for pipes domestic production) indicates the recommended area of application of this type pipes:
| Operating class of polypropylene pipes | Fluid temperature (operating / maximum), ºC | Purpose of pipes |
|---|---|---|
| HV | up to 20 | Cold water systems+ |
| 1 | 60 / 80 | Hot water system with a maximum temperature of 60 ºC |
| 2 | 70 / 80 | Hot water system with a maximum temperature of 70 ºC |
| 3 | 40 / 60 | Low-temperature floor heating systems |
| 4 | 60 / 70 | Floor heating systems with high temperature operating conditions, classical systems heating heating with maximum coolant temperatures up to 60 ºC |
| 5 | 80 / 90 | Heating systems with high temperatures, including central heating |
AND– The last alphanumeric designation indicates the one normative document(GOST, ISO or TO, according to the standards of which these products are manufactured.
Having received information about the classification of the pipe, you can immediately estimate the possible duration of its operation under the planned conditions. The following table will help with this:
| Coolant temperature, ºС | Estimated service life | Pipe types | |||
|---|---|---|---|---|---|
| PN-25 | PN-20 | PN-16 | PN-10 | ||
| Maximum operating pressure in the system (kgf/cm²) | |||||
| 20 | 10 | 33.9 | 21.7 | 21.7 | 13.5 |
| 25 | 33 | 26.4 | 21.1 | 13.2 | |
| 50 | 32.3 | 25.9 | 20.7 | 12.9 | |
| 30 | 10 | 9.3 | 23.5 | 18.8 | 11.7 |
| 25 | 28.3 | 22.7 | 18.1 | 11.3 | |
| 50 | 27.7 | 22.1 | 17.7 | 11.1 | |
| 40 | 10 | 25.3 | 20.3 | 16.2 | 10.1 |
| 25 | 24.3 | 19.5 | 15.6 | 9.7 | |
| 50 | 23 | 18.4 | 14.7 | 9.2 | |
| 50 | 10 | 21.7 | 23.5 | 17.3 | 13.9 |
| 25 | 20 | 16 | 12.8 | 8 | |
| 50 | 18.3 | 14.7 | 11.7 | 7.3 | |
| 60 | 10 | 18 | 14.4 | 11.5 | 7.2 |
| 25 | 15.3 | 12.3 | 9.8 | 6.1 | |
| 50 | 13.7 | 10.9 | 8.7 | 5.5 | |
| 70 | 10 | 13.3 | 10.7 | 8.5 | 5.3 |
| 25 | 11.9 | 9.1 | 7.3 | 4.5 | |
| 30 | 11 | 8.8 | 7 | 4.4 | |
| 50 | 10.7 | 8.5 | 6.8 | 4.3 | |
| 80 | 5 | 10.8 | 8.7 | 6.9 | 4.3 |
| 10 | 9.8 | 7.9 | 6.3 | 3.9 | |
| 25 | 9.2 | 7.5 | 5.9 | 3.7 | |
| 95 | 1 | 8.5 | 7.6 | 6.7 | 3.9 |
| 5 | 6.1 | 5.4 | 4.4 | 2.8 | |
Prices for glass fiber reinforced polypropylene pipes
reinforced polypropylene pipes
Structure of polypropylene pipes with fiberglass reinforcement
As mentioned above, polypropylene pipes are reinforced to make them resistant to elevated temperatures and baric loads and to sharply reduce the rate of linear thermal expansion. In order to decide which option is better to choose - pipes reinforced with aluminum or fiberglass, it is worth comparing their main characteristics.
Fiberglass began to be used to strengthen polypropylene pipes much later than aluminum foil. Products reinforced with this material are a three-layer structure, with the reinforcing layer located between two layers of polypropylene.
"Armobelt" can consist only of fiberglass, or of composite material, containing fiberglass and polypropylene. In any of these options, the layers have excellent adhesion to each other, practically becoming a monolithic structure.
Thanks to such reliable soldering, delamination of the walls of a well-made pipe is even theoretically impossible.
Fiberglass perfectly inhibits thermal expansion, which prevents the pipes from deforming or stretching in any way as the temperature rises
This type of reinforced polypropylene pipes is produced in various dimensional parameters. Thus, products with a diameter of less than 17 mm are used mainly for installing a “warm floor” system; pipes Ø 20 mm are well suited for in-house hot water distribution, and from 20 to 32 mm (sometimes more) – for arranging circuits of heating systems .
The connection of polypropylene pipes with fiberglass reinforcement is carried out by welding, sometimes by other means installation methods. Moreover, with welding work this type of pipe does not require a rather labor-intensive stripping operation, which greatly facilitates and speeds up the work. The absence of metal elements in the design of these pipes eliminates the appearance of deposits of hardness salts, and the connections of all parts of the heating system become completely monolithic.
Let's compare the advantages and disadvantages of fiberglass and aluminum reinforcement of PPR pipes
- The first thing that needs to be said is that the coefficient of thermal expansion for pipes with aluminum and fiberglass reinforcement is almost the same, and ranges from 0.03 to 0.035 mm/m׺С. Thus, both types, from this point of view, are equivalent.
- The fiberglass reinforcing layer covers the entire space between the outer and inner layers of polypropylene. Therefore, these pipes are resistant to ruptures, reliable and durable, and their estimated service life is about 50 years. In pipes reinforced with aluminum, the reinforcing layer has a welded seam (and sometimes, in inexpensive products, even the simply joining edges of the foil are overlapped), which makes them more vulnerable to elevated temperature and pressure.
- Pipes reinforced with glass fiber are a good anti-diffusion layer that does not allow oxygen to pass through to the coolant.
The diffusion process will certainly lead to the acceleration of corrosion processes metal equipment heating system - this is a boiler, pump, shut-off and control valves and other elements.
Since products reinforced with aluminum sometimes have a non-continuous layer of foil, the danger of penetration into the coolant increases. In addition, aluminum itself is very unstable to oxygen corrosion.
- When installing pipes with a fiberglass layer, the density and strength of their connections does not require regular monitoring and maintenance. If products reinforced with aluminum are installed, the reliability of the connection will depend on the quality of calibration and cleaning before installation.
The fact is that pipes with an aluminum reinforcing belt are glued construction walls If, during the soldering process, a section of metal remains on the cut in contact with the coolant, then this is where the process of wall delamination can begin. And this, in turn, will most likely lead first to swelling, and then to a breakthrough in the pipe body.
And for pipes with fiberglass reinforcement, which are practically monolithic structure, this “Achilles heel” is missing.
And it’s much faster and easier to weld pipes without stripping, especially since you don’t need a special tool (shaver) for these purposes.
- Pipes reinforced with glass fiber have good thermal insulation properties, which minimizes heat losses. Pipes reinforced with aluminum foil have slightly higher thermal conductivity.
- All materials used in the manufacture of polypropylene reinforced pipes for heating are non-toxic and do not emit harmful fumes both when cold and when heated. This applies equally to both types of pipes.
- The resistance to chemical influences is no different, which allows both types to withstand the “aggression” of low-quality coolant.
- The temperature range within which these types of pipes normally operate is from -10 to +95 degrees. But, even with a short-term increase in temperature above the specified value, the pipe may sag a little, but there should be no damage to it.
Based on the considered data characteristics, we can conclude that the best option for installation in a heating system for supplying coolant to radiators are PN-20 and PN-25 pipes with diameters from 20÷25 mm. But when installing pipes with a smaller diameter in the heating system, inseam, formed during the soldering process, can interfere with the free flow of coolant.
For the installation of risers, pipes with a diameter of at least 32 mm are usually selected, otherwise it may also be small for the full movement of the coolant. Larger diameters can also be used in the collector sections of the system - the range of products on sale allows this.
You may be interested in information about what suitable
Manufacturers of glass fiber reinforced polypropylene pipes
At the end of the publication - a short review of high-quality polypropylene pipes with fiberglass reinforcement, domestic and foreign production, which deserve positive reviews professionals.
"METAK"
"METAK" is a Russian company that produces various products from polypropylene for heating and cold water supply systems, including fiberglass-reinforced pipes under the "METAK FIBER" brand. These products are excellent for installation in highly loaded heating systems.
The pipes are produced in white design, have a maximum operating temperature of 95 degrees, and are designed for an operating pressure of 25 bar with a destructive pressure of 50 bar.
Fiberglass-reinforced polypropylene three-layer pipes from METAC and their connecting parts (fittings) are produced in accordance with GOST. They are used for installing cold and hot water supply pipelines, heated floors, wiring systems and process pipelines, so they can have different diameters.
This table provides information on the sizes of fiberglass reinforced pipes produced by this company. The common length for all products is 4000 mm.
| Pipe outer diameter, mm | Inner diameter, mm | Wall thickness, mm |
|---|---|---|
| 20 | 13.2 | 3.4 |
| 25 | 16.6 | 4.2 |
| 32 | 21.2 | 5.4 |
| 40 | 26.6 | 6.7 |
| 50 | 33.2 | 8.4 |
| 63 | 42 | 10.5 |
| 75 | 50 | 12.5 |
These products are excellent for heating systems country houses and apartments in multi-storey buildings. All METAC products comply with all domestic and European standards and requirements established for these products, as they are produced on high-tech equipment under the strict supervision of qualified specialists.
"FV Plast"
The Czech company FV Plast specializes in the development and production of polypropylene pipes intended for pressure water pipes for serving cold drinking water, hot water supply and heating systems. The company produces polypropylene pipes and fittings for them only gray, with a reinforcing aluminum and fiberglass layer.
"FV Plast" was one of the first to engage in the production of glass fiber reinforced products - this the lineup products is called "FASER".
Prices for polypropylene pipes FV Plast
reinforced polypropylene pipes FV Plast
Characteristics of FV Plast FASER pipes reinforced with glass fiber:
- The operating temperature of the coolant is up to 80 degrees.
- A short-term increase in temperature is allowed up to 90 degrees.
- The operating pressure of the system is 20 bar.
- The maximum permissible pressure is 36 bar.
- The service life of the products declared by the manufacturer is 25÷50 years.
In addition to the pipes themselves, the company presents on the market all the necessary components for them, which allows using materials from one manufacturer to create heating circuits of any complexity with guaranteed reliability.
You may be interested in information about what they are
"Kalde"
Kalde is a Turkish leading manufacturer of modern heating and plumbing systems assembled from PPR pipes and components. The material of this company is characterized by maximum protection against build-up and contamination inside the pipes throughout the entire service life. Reliable, lightweight, durable, comfortable and economical Kalde systems are inert to corrosion and chemical exposure. Available in a wide range of diameters - from 20 to 110 mm.
Kalde Fiber is a three-layer pipe with a white outer surface, made of polypropylene and reinforced with glass fiber. It is distinguished by excellent heat resistance, with an upper limit of coolant temperature reaching up to 95 degrees. Even at such a system temperature and pressure not exceeding 10 bar, the manufacturer declares a service life of at least 50 years.
Prices for Kalde polypropylene pipes
Kalde reinforced polypropylene pipes
In addition to the above, the company also produces polypropylene pipes of various types:
- PN10 and PN20, made of polypropylene, PPRC– without internal reinforcement.
- PN20 and PN25, reinforced with aluminum foil - pipes for heating and heat supply, air conditioning systems and similar industrial uses.
- AL-Super is a polypropylene pipe reinforced in the middle layer with aluminum foil that does not require trimming or stripping.
The range of Kalde components is very diverse and is intended for different, even the most complex heating circuits.
"BANNINGER"
"BANNINGER" is a German company that produces products that are distinguished by true European quality and undeniable reliability in operation. The company produces polypropylene pipes and a full set of necessary components for the installation of heating circuits, hot and cold water supply. A distinctive feature is the unusual emerald green color of BANNINGER polypropylene pipes.
The products are characterized by high plasticity, therefore they react calmly to high and low temperatures. The parameters of polypropylene parts were selected taking into account research on the fatigue properties of the material, during operation for 50 years, at a constant temperature of 70 degrees and pressure up to 10 bar.
The company's product range includes polypropylene pipes without reinforcing materials, as well as with an aluminum and fiberglass layer. Within the framework of this article, samples of the “WATERTEC” series deserve attention » and "CLIMATEC". Their use will provide the created heating circuit with guaranteed reliability and durability.
A few words in conclusion
In conclusion, I would like to recommend not to purchase pipes from unknown manufacturers who do not even mention the name of their company in the product labeling. By saving a little, you can buy a product that will not last even one heating season, failing at the most inopportune moment. In such a situation, you will have to pay a much larger sum to replace the heating system pipes and repair your own and, possibly, your neighbor’s apartment.
One more small note. One of the most frequently asked questions is the following: “What information does the color of the reinforcing layer located in the pipe wall convey?” The answer is simple - none. The color of the reinforcement is rather a “whim” of the manufacturer, a desire to highlight their products against the general background.
By and large, any fiberglass-reinforced polypropylene pipe is itself designed for operation at elevated temperatures. So whether the reinforcing “ring” will be red, green, blue or gray - it doesn’t matter. The main information is in the alphanumeric marking of the pipe and in its technical documentation, which, by the way, do not forget to get acquainted with in the store when choosing a material.
And finally, to “consolidate” the information received about polypropylene pipes, watch the video attached below:
Video: Recommendations for the correct selection of polypropylene pipes
You might be interested in information on how to choose
Evgeniy AfanasyevChief Editor
Author of the publication 14.10.2016
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general characteristics
Pipes reinforced with glass fiber create serious competition with analogues reinforced with aluminum foil. Such risers are characterized by a three-layer structure: polypropylene - fiberglass - polypropylene. The reinforcing layer is also made from propylene, reinforced with fiberglass - glass fibers.
In terms of its technical parameters, the adhesion of plastic to glass fibers can be compared to the strength of a monolith.
Fiberglass-reinforced pipes are characterized by the following marking: PPR-FB-PPR.
If we compare risers with aluminum and fiberglass frames, the first option has one significant advantage: the products have greater rigidity. This means that when installing systems 1.5 meters long or more, such risers must be secured to the walls with special fasteners. Otherwise, sagging, deformation, and failure of the structure are possible.
Regarding diameters, it should be noted that products can be produced with diameters from 20 mm to 110 mm. It is these risers that can be found on sale more often than others. Although, for example, elements with a diameter of 17 mm or less are used to install heated floors.
Products of small diameters are secured with plastic clips, and large ones with clamps.
Polypropylene products
Fiberglass reinforced ones depend on the polymer used to make them. All products are marked, which makes it possible to immediately determine the areas of use of tubular parts.
Let's find out. So, PPR is English, and PPR is Russian name means that this is a Polypropylene pipe made from Random copolymer.
Such glass fiber reinforced polypropylene pipes are used for heating, plumbing, ventilation systems, industrial pipelines.
When arranging utility networks, fiberglass-reinforced PPR pipes are increasingly being used. There is nothing strange in this, since they are reliable, quite lightweight, and there are significantly fewer problems with their installation.
Another important factor is cost. For example, the price of PPR pipes reinforced with glass fiber for heating is lower than their metal counterparts, which helps save the family budget. These, as well as other characteristics, which the glass fiber reinforced polypropylene pipe has, contributed to its popularization and use in different areas National economy.
Read with this article: Main characteristics and scope of application and what influences its choice. Classification by pressure and composition of raw materials. Polar questions and answers to them.
10 advantages
High quality material using modern production technologies, in combination, provide the communications in question with popularity.
What are the main positive characteristics of glass fiber reinforced pipes?
The advantages can be confidently included:
- Corrosion resistance.
To be more precise, then this material Doesn't rust at all. Thanks to this, systems made of fiberglass-reinforced polypropylene pipes, which are used for heating, plumbing, and ventilation, do not require replacement for many years. - Long service life.
Subject to operating standards and rules, polymer products last approximately 4 times longer compared to metal counterparts. - Low thermal conductivity.
This property completely eliminates the appearance of condensation on pipelines during their operation. - Small noises and vibrations.
Thanks to their design, polypropylene pipes almost do not transmit sound that occurs as a result of the movement of liquid media. Therefore, the occurrence of uncomfortable conditions in the premises is completely excluded. - Complete absence of defrosting.
This means that even at subzero temperatures there is only a slight expansion of fiberglass-reinforced polypropylene pipes, which cannot be said about products made of steel, copper, and metal-plastic. The last three options for water risers can simply burst under the influence of frost. - Easy to install.
You do not need to have special knowledge and skills to lay the highway. You just need to try to install the system with your own hands once, and then everything will go like clockwork. Engineering communications of the most complex configurations are carried out very easily. This is facilitated by the presence large quantity fittings. - Absolute tightness of joints.
, which means, in the future, ideal functioning of the pipeline. - No minimal deposits, pressure loss, which is ensured by the smoothness of the inner surface.
- Chemical inertness, which is expressed in increased resistance to aggressive environments.
- Lightness, ease of maintenance.
The products do not require painting, and the reliability of the connections allows the pipelines to be used for decades without repair.
Some of the best fiberglass-reinforced pipes today are considered to be German pipeline systems from aquatherm GmbH. You can purchase from a representative of the Agpipe Group of Companies plant (https://agpipe.ru/trubi_armirovannie_steklovoloknom) - detailed description products, characteristics, range and much more.
4 minuses
According to reviews, fiberglass-reinforced polypropylene pipes for heating or water supply systems have some disadvantages.
- Mandatory pre-installation treatment.
This means that there are PPR pipes that must be trimmed before welding. This procedure can be performed with a simple file or a special device. This, in some way, complicates the installation work. - Sensitivity to mechanical influences.
Although PPR pipes are not brittle, they are not as strong as metal parts, for example. Taking this into account, when the highway passes under highways, the risers are protected with special boxes. - It is not recommended to bend the products, but only joined using fittings or welding.
What types of polymer pipes are there?
Currently, 2 types of polymer products are known:
- single-layer;
- multilayer.
What characteristics do each type of product have?
Single layer
There are 4 modifications of polypropylene risers of one-piece construction, used for heating or water supply.
1st type: PPN pipes.
Homopolypropylene is used for their production. They are used in engineering pipeline structures for supplying cold water, arranging ventilation, and industrial pipelines.
2nd type: RRV pipes.
The basis for production is polypropylene block copolymer. Products are intended for installation underfloor heating, cold water supply networks.
3rd type: PPR pipes.
The material for the production of parts is random polypropylene copolymer. The main property of the substance: promoting uniform distribution of loads on the internal walls of pipelines.
Hot, cold water supply, floor heating systems, water radiator heating- here is a list of applications for risers of this type.
4th type: PPs pipes.
The main characteristics of the products: polypropylene with increased heat resistance is used for production.
The parts of such a line are able to withstand temperatures of transported media up to +95⁰С. If necessary, it is possible to transport media with temperatures up to +110⁰C for a short period of time.
The first three analogues are designed to operate at temperatures around +70⁰С. In short-term mode, operation is allowed at slightly higher temperatures.
Products of the 3rd type are covered with a special shell, which can completely eliminate the negative effects of ultraviolet radiation.
Important! You should not often use the system operation in the maximum permissible parameters mode.
About multilayer analogues
Polypropylene (PP) pipes consisting of several layers are reinforced with fiberglass for water supply. In comparison with solid cast structures, PP products practically do not change linear dimensions when high temperatures transported media. Thanks to this property, the scope of application of solid-cast communications is significantly expanding.
The following modifications of multilayer risers can be distinguished.
1. Products for the reinforcement of which perforated aluminum foil is used.
They are characterized by the presence, on the outer or middle layer, of small diameter holes in the form of a mesh. The strength of the connection with the polymer is achieved due to the viscosity and fluidity of the substance that penetrates into the holes of the aluminum layer.
Product advantages
- Low coefficient of linear expansion;
- increased strength.
Minuses
- During the welding process, it is quite reliable to connect only the top layer of the riser to the fittings;
- aluminum reinforcement must be removed before welding, since failure to perform this operation may cause a poor-quality connection.
2. PP pipes with reinforcement in the form of solid aluminum foil.
The foil can be located both on the outer and on the middle layer of the pipe part, but it is imperative that polymer layers are placed on both sides of the metal.
Before you start welding, you need to trim the risers. Thanks to the procedure, the possibility of contact of aluminum with a moving medium is eliminated.
Advantages
- Low coefficient of thermal expansion;
- increased strength properties.
The disadvantages include:
- not all layers are welded reliably. In welding areas, only the outer layer is absolutely reliable;
- mandatory removal of unnecessary aluminum residues, which takes a lot of time.
Important! To remove the aluminum layer before welding, you need to use special tool. Its purpose: to accurately measure the depth to which the pipes should be lowered into the fittings in order to clean the inner surface to the same distance.
Failure to comply with this condition can lead to an unreliable connection, which is fraught with the occurrence of electrochemical processes when the foil comes into contact with water.
Some enterprises have mastered the production of communications of this type, the design of which does not foresee preliminary cleaning before welding.
3. PP products with polyethylene reinforcement.
That is, the outer layer of the pipe looks like a thick polyethylene layer.
Advantages
- Low coefficient of thermal expansion;
- no cleaning required before joining by welding;
- operation at high temperatures.
Minuses
- Possible during docking reliable connection fitting only with an outer layer;
- full contact of the transported medium and polyethylene is not excluded;
- strength characteristics want to be the best, since the layers are interconnected.
4. PP pipe with fiberglass reinforcement.
Design feature: the presence of a middle polypropylene layer filled with fiberglass. Fillers are often colored to make them better visually distinguishable.
The advantages of this type of communication are greater than those of previous analogues combined.
Firstly: structures with pipes reinforced with fiberglass for heating or water supply are highly durable and solid.
Secondly: Fiberglass-reinforced risers are characterized by a relatively low coefficient of thermal expansion, which is approximately 25% less than that of non-reinforced counterparts.
Third: Before hot joining, there is no need to clean the ends of the elements being connected.
Fourth: The fiberglass line has increased rigidity.
Fiberglass elements have one drawback, and even that has not yet been fully proven: the penetration of oxygen through the material.
If this fact is fully confirmed, an accelerated process of corrosion of the metal from which the boilers are made is possible.
Theoretically, such a disadvantage is possible, but in practice, research is still being carried out.
How elements are connected to each other
PPR pipes reinforced with glass fiber can be joined into a single structure by diffusion welding or fittings (adapters, couplings, tees and other parts).
In each of the methods, the so-called welding machine. The risers joined in this way create a monolithic, non-demountable structure.
The presence of special adapters in the form of threaded or flanged connections makes it possible to fasten a PPR polypropylene pipe reinforced with glass fiber to a metal line corresponding to the fittings.
What is a fiberglass reinforced polypropylene pipe?
These products are 3-layer polypropylene pipes reinforced with FIBER glass fiber.
They differ:
- increased resistance to corrosion processes and chemical influences;
- abrasion resistance;
- hygiene. Thanks to this property, the products have found their application in the installation of drinking water pipelines;
- environmental safety;
- long service life;
- ease of installation.
In addition, the products are universal in their use.
This is manifested in the fact that they are used:
- when installing heated floors, water heating;
- for supplying hot and cold water;
- in the process of arranging drainage and sewer systems.
Thanks to design features risers, the product practically does not change its linear dimensions, which is very important when installing heating and ventilation communications.
How to choose the right one
This question is asked by everyone who deals with the arrangement of pipe structures during repairs or when building a new house. The main thing is that the planned highway is of high quality and cheap.
For optimal solution question, you need to have knowledge about technical specifications system that is planned to be built.
Experts advise adhering to certain recommendations regarding other characteristics, the main ones being:
- diameter;
- pressure;
- manufacturers.
1. Required diameters.
Today's market is saturated with products with diameters of 20-110 mm.
In everyday life, elements with a diameter of up to 40 mm are most often used. Risers of this thickness are used in the installation of heating, ventilation systems, hot and cold water supply.
In some cases, the maximum possible accurate calculations when installing certain communications. In such situations, it is necessary to use the services of specialists who, using formulas, will make the necessary calculations. Taking into account the maximum water flow rate and the speed of its movement, professionals will tell you as accurately as possible what diameter riser should be used in a given case.
2. What pressure are the parts designed for?
To a person not familiar with the specifics of such work, the task of choosing a riser that can withstand a certain pressure seems quite difficult. But this is at first glance. In fact, the problem is easily solved.
To do this you need: to know what pressure the heating or plumbing system is designed for and... to be able to read. This means that since all glass fiber reinforced PPR pipes are marked, it contains all the information about the product. That's where it says what maximum pressure the product is calculated.
Mostly, in everyday life, communications with the inscription PN20 are used, which means that the part can be used in lines with a pressure of up to 20 atm. This number is exaggerated, since such pressure is not observed in household lines. For example, in heating systems one-story buildings nominal pressure 2.5 - 4 atmospheres. But a margin of safety won't hurt.
Regarding the diameter, it is necessary to select the appropriate fittings.
Important! The optimal option for selecting pipes and fittings is to have parts not only of the same diameter, but also of the same manufacturer. When installing a structure made from such elements, minimal problems are eliminated.
3. Manufacturers
The correct choice of PPR risers also includes the choice of manufacturer. There is no one specific company whose products would satisfy all customers.
The question is to avoid unnecessary problems. Therefore, preference should be given to that (or those) enterprises whose reputation in the market for similar goods is impeccable.
Companies from Europe have a certain advantage in this regard. High quality, reliable operation, affordable price, which means that products from companies from Germany and the Czech Republic are popular.
IN last years The quality of goods from Turkey and China has increased significantly.
Domestic manufacturers are slightly behind them, whose products today are distinguished not only by relatively low prices, but also by proper quality. The choice is yours. The main thing is not to buy fakes. Therefore, buy goods in branded stores, requiring a quality certificate.
In addition to these, there are other reasons that influence the choice of product. There is, however, one thing: we did not remember at all about the service life of products made from white polypropylene. There is a reason for this. Sticking to the requirements correct operation, the elements of the pipeline structure are fully capable of withstanding the period of time needed to start the next overhaul building.
These are the materials today.
conclusions
We can conclude that given the positive characteristics of the pipes PPR reinforced fiberglass, their budget price, scope of use - heating, ventilation, water supply systems, the products are not in vain claiming to be a leader in their class.
The future lies with polymer communications, as they will be a worthy replacement for traditional metal pipelines.
Video
Polypropylene in construction industry used for different tasks. However, the most useful and popular area of its application is the creation of pipes for heating and water supply systems.
It is from polypropylene that modern plastic pipelines are assembled. Polypropylene pipes reinforced with fiberglass are especially popular, since the reviews and their characteristics are truly unique.
Purpose and application
Technical polypropylene samples are used for the assembly of mainly civil pipelines. Polypropylene itself has excellent properties, as well as good reviews. It does not react to corrosion, has a high operating pressure and is very durable.
In terms of strength, this material is head and shoulders above all other building polymers. However, strength is also achieved due to the rather impressive thickness of the pipe walls. For polypropylene samples, their thickness can reach up to 6-7 mm.
The only problem with such products is that polypropylene is capable of expanding under thermal loads. In this case, the pipe not only increases in size, but also loses a significant percentage of its rigidity.
It was to eliminate such problems that polypropylene products with fiberglass inside were invented. Their peculiarity is that inside the pipe there is a reinforcing layer of fiberglass. This is a kind of rigid frame for the pipe that will keep the polymer in its normal state.
Products with aluminum reinforcement are also manufactured. They are also good and suitable for execution various works that are associated with the installation of pipelines. However, aluminum is not as reliable in limiting thermal expansion. But welding pipes made of polypropylene reinforced with fiberglass is much more reliable in this regard.
It is worth noting that the developers have special markings for fiberglass-reinforced polypropylene pipes. The labeling is designed to make it easier for customers. Products made from ordinary polypropylene are marked with a PP index.
The PPR indicator is already a marking of a reinforced pipe. And PPRS is a model made of polypropylene, which is reinforced using the latest developments in this area. In their production, a special copolymer is used, which qualitatively improves all the properties of the product.
Characteristics and properties
The characteristics of glass fiber reinforced polypropylene pipe are its main advantage. Which, however, is quite natural.
PP pipe reinforced with glass fiber can withstand heavy loads. First of all, welding takes into account the increase in rigidity and ductility of the product. The fiberglass here acts as a stabilizing frame.
The operating temperature limit is also significantly increased. PPR tube reinforced with glass fiber can be used without problems at temperatures from -50 to + 350 degrees. Moreover, in the specified range, the size and welding of the pipe will change only slightly. Average thermal expansion is only 1 centimeter per 1 meter.
As operating levels increase, the pipe will lose its rigidity, but only slightly. And the most important thing is that the internal reinforced layer of fiberglass threads will not allow it to burst even if critical indicators are exceeded.
The technical characteristics of glass fiber reinforced pipes also allow their use in external pipelines.
When working with ordinary materials, it is not recommended to use standard plastic products outside the building, since after several cycles of freezing and thawing there is a high chance of damage. But a plastic pipe reinforced with fiberglass does not impose such restrictions.
Another big plus is that PPR pipe reinforced with fiberglass, it is much easier to install, welding is of better quality than its aluminum counterparts. When cutting models with aluminum reinforcement, they need to be additionally cleaned, calibrated and the remains of the metal sheet removed.
Fiberglass is introduced into the product by extruding it. As a result, welding provides complete monolithic material, which lends itself perfectly to various manipulations and is easy to work with.
Advantages and disadvantages
Based on the properties described above, we can highlight the main pros and cons of polypropylene pipes with fiberglass reinforcement.
Main advantages:
- Durability;
- Corrosion resistance;
- Minimum temperature expansion rate;
- Increased structural rigidity and overall strength;
- Simplified installation process;
- Versatility;
- Wide operating temperature range;
- The price of a glass fiber reinforced pipe, although higher than other polymer products, is still quite acceptable and justified.
As for the disadvantages, these products also have them and are more likely to relate to the diseases of most polymer materials of this type.
Main disadvantages:
- With direct and prolonged contact with sunlight, the polymer begins to degrade;
- The linear expansion of products of this type is higher than that of metal ones.
Types and differences
There are several main types of such products. Each type has its own marking so that welding corresponds to its working pressure. The higher this indicator, the stronger the welding, the more reliable and more expensive the product.
- Products marked PN-10 can withstand pressures of 10 bar and are used for equipment primarily in cold water supply systems. The price of PPR glass fiber reinforced pipe PN-10 is 0.7-1 dollar per 1 linear meter;
- PN-16 pipelines can withstand a pressure of 16 bar and are used for heating and water supply systems. The price of a PP pipe reinforced with glass fiber of this type is at the level of 1-2 dollars per 1 linear meter;
- Products labeled PN-20 are considered the most popular and in demand. It is used to create circuits in underfloor heating systems, stationary heating systems, etc. These pipes sell for 3-4 dollars per 1 linear meter;
- Polypropylene pipe PN 25, reinforced with glass fiber, withstands pressure from 25 bar, is used as the main element for assembling central heating systems. The price of a PN25 pipe reinforced with glass fiber is 4-6 dollars per 1 linear meter;
- PPRS pipe reinforced with fiberglass is essentially a separate species it is not, but it would be a mistake not to include it here. As mentioned above, polymer is used to create it High Quality, which significantly improves its performance characteristics. These products are very durable, resistant, and also elastic. Capable of dampening noise and vibration. You can buy them for 4-8 dollars.
It is worth understanding that the price of polypropylene products reinforced with fiberglass is largely determined by their thickness. A piece with a diameter of 16 mm will cost 2-2.5 times cheaper than a similar one with a diameter of 40 mm.
Welding reinforced (PP) polypropylene pipes (video)
Find in store polypropylene pipelines very easy. They differ from other plastic products in their matte color and thick walls. Reinforced samples are also distinguished by the fact that in the center of the wall in the section you can see a line of a certain color. This is a layer of reinforcement.
The color of this layer and the polypropylene itself can tell you little. Each developer uses his own technologies and in this regard the standards are almost not unified. However, be careful and remember that before you buy fiberglass-reinforced polypropylene pipes, you need to make sure of their reliability.
The fact is that many manufacturers are trying to save their resources, so they produce products from recycled materials. It is quite obvious that they will be inferior in quality to the original products. It is better to refuse to purchase such products.
Make sure in advance that the seller has all the certificates with permission to sell. The presence of documents almost always guarantees that you are buying truly branded products that will serve you for decades.
An increase in pressure is not critical, but it reduces the possible duration of their service life. However, the manufacturer can no longer guarantee their normal operation.
Pay attention to the diameter of the product, as well as the thickness of their walls. For example, products made of polypropylene reinforced with glass fiber 40 mm in diameter are more likely intended for laying the main branches of water supply or heating.
However, it will not be profitable to buy it for the equipment of the entire system. For such purposes, samples with a diameter of 15-25 mm are better suited.
Remember that polypropylene products are quite thick. Therefore, a pipe with an outer diameter of 20 mm may have half the nominal diameter, which will certainly affect its throughput.
Polypropylene pipes They are environmentally friendly and have many properties that are superior to steel ones. They are more technologically advanced, their price is lower, they do not need to be protected from corrosion, the process of connecting them into a pipeline is much less labor-intensive, and their service life is much longer.
Mainly used for heating fiberglass reinforced or aluminum polypropylene pipes. This is due to the fact that the temperature of the coolant in heating systems can reach 100 degrees Celsius. At this temperature, unreinforced pipes laid on clips will linearly elongate and sag, which requires the introduction of expansion joints into the pipeline.Glass fiber reinforced polypropylene pipes, have a coefficient of linear expansion five times less than unreinforced ones. Their sagging is significantly less, which allows you to install the clips at a greater distance from each other.
Historically, the first reinforced polypropylene pipes were pipes reinforced not with glass fiber, but with a layer of aluminum applied over the surface. Their price is slightly higher compared to non-reinforced ones. But they have one inconvenience - before installation, such pipes must be stripped of aluminum, and this is quite painstaking work that increases the pipeline assembly time. For glass fiber reinforced pipes, the reinforcing layer is buried inside the structure, which does not require such stripping before connecting them.
Reinforced polypropylene pipes, price which are approximately the same as those coated with aluminum, they have greater thermal resistance, since there is no metal in their design. Because of this, they can be insulated with energyflex or k-flex tubes with a wall thickness slightly thinner than aluminum tubes.
The organization's warehouse has fiberglass-reinforced polypropylene pipes in stock. External diameter from 20 to 110 mm.