Polypropylene pipes PPRC aluminum reinforced. Polypropylene pipes reinforced by aluminum PN25 Valtec pipe for heating polypropylene reinforced by aluminum

Plastic pipes are a modern replacement for old heavy metal pipes. Such light tubes from plastic appeared not so long ago, however, they rapidly won a firm position among other pipes in the plumbing market.

Choosing material for the pipeline, you will probably give your preference to plastic products, but it will be quite difficult to choose a specific option, because they can be manufactured from a variety of different materials: polyethylene, polypropylene, etc. In this article, we will consider the advantages and disadvantages of pipes from polypropylene, comparing them with analogues.

Characteristics of polypropylene pipes

PPR pipe has whole line Distinctive characteristics, however, the main of them - the ease of the product, which is provided by the raw material - the thermoplastic polymer with the smallest density (0.91 / cubic meter) among similar materials.

The remaining characteristics define the scope of pipeline data:

The operating temperature of the polypropylene pipes is from -5 ° C to + 140 ° C, so they are perfectly suitable for organizing heating, hot and cold water supply systems, but only indoors. Laying the water supply outside, it is better to use stitched polyethylene pipeswhich are not deformed when cooling up to -50 ° C;
Plastic is not corrosion that was a big problem metal pipes, Moreover, plastic water pipe guaranteed will serve at least 50 years;
The PPR tube has a smooth inner wall, which significantly increases their throughput, and also does not allow them to clog;
Plastic pipes are completely inert to most chemicals;
Polypropylene pipes have a wide range of different diameters;
Installation of PPR pipes is performed using special fittings manufactured from polypropylene. Pipes are welded in fittings by a special apparatus that you can purchase at an affordable price.

Types of polypropylene tubes

There are 4 main categories of polypropylene pipes:

PPH - polypropylene tube with high strength, but low resistance to negative temperatures. The main area of \u200b\u200bapplication of such pipes is a gasket of cold water supply on an industrial scale;
Ppb. - polypropylene tube, for the manufacture of which is additionally used polyethylene. The result is a solid pipe, stable low and high temperatures. More often used for laying a warm floor system;
Pipe Pipe. Move from a special polymer, which includes ethylene molecules. Such a mixture allows you to achieve a special tensile strength, so such pipes are perfectly withstanding pressure jumps. Pipes are great for laying cold and hot water supply, but the water temperature in them should not exceed 70 ° C;
PPS-Trubs are distinguished by resistance to high temperatures up to 95 ° C. Often such pipes are marked with a red stripe.

Reinforced polypropylene pipes

One of meaningful flaws Polypropylene is a high coefficient of thermal expansion. This is especially noticeable when building a heating system, where polypropylene under the influence of heat is expanding so much that when they are installed, you have to install compensating loops, which is quite uncomfortable.

Manufacturers have long taken care of this shortcoming, releasing the fortified polypropylene tube.

Trumpet PPR reinforced There are also various categories:

PN20.-Trub is rejected by fiberglass. Machining polypropylene tubes, the manufacturer adds a glass fiber layer into them, which later came into two adjacent propylene layers. Thus, a reinforced construction is obtained, which is used when laying hot water pipes with large quantity docking. Such a pipe also has its drawback - a limitation in the dimeter width, the maximum size of which is 63 mm;
PN25. - polypropylene, reinforced by aluminum. The principle of reinforcement is similar to the previous one, however, sheets and aluminum profiles are used here. The cross section of such pipes can be up to 100 mm, but their installation is harder and requires stripping aluminum layer.

Reinforced polypropylene pipes. The material is completely new, for only a few years it is used when installing water pipes and heating systems.

Let's figure out which types of reinforced polypropylene are produced, for which signs they can be distinguished and, most importantly, on what to stop their choice when buying.

Polypropylene problems

No humus without good. Excellent example of positive thinking. Unfortunately, true and the opposite: there is no good without loud. The gloriousness in the address of polypropylene pipes was already called so much that they simply cannot have no shortcomings.

And in fact, there are circumstances in which polypropylene is better to prefer other materials.

Causes lies in the properties of the material itself:

Polypropylene - low-melting plastic;
It has a large coefficient of thermal expansion.

Pull your attention on his problems.

Temperature

Polypropylene melting temperature - 175 C. However, it starts to soften with much lower 140 C. What is up to a guaranteed temperature at which the polypropylene tube must work guaranteed - it is only 95 degrees on the Celsius scale (and for some varieties and is less) .

What is connected so significant reinsurance with the temperature - it has already been written. Now we only note that with high pressure and high temperature acting on the material at the same time, it is less than less racks than under the influence of each of the factors separately.

Extension when heated

All materials are expanding when heated. Some - less, more more. Polypropylene expands very much.

It is inconvenient for the following reasons:

Aesthetics. Long straight pipe, lengthened, goes with untidy waves.

The integrity of decorative coatings. If the pipes are recessed under the tie on the floor or into the wall covering, then when lengthening, after some time, they will inevitably make the coating inevitably make the coating.

Decision

Reinforced polypropylene tube - "Our answer Chamberlain." Of course, its material does not begin to make a magical way to compete with tungsten in handling and not becoming harder diamond. However, polypropylene reinforced trumpet Lained one of the disadvantages of the material completely, the other is partially.

How?

But what.

Reinforcement simply forms something like a rigid frame And does not give the pipe to lengthen, but at the same time grow in thickness.
Polypropylene - he is soft in the shower. No - it's not. It is not allowed in the length - the heather of the polymer molecule so that each one individually has become a snake, and all together remained in place.
What happens when the pipe is heated to the material softening point with a large overpressure inside?
She begins to inflate as an air ball. At the same time, the walls are all thinner and thinner, and if so - to sell their water inside everything is easier.
Finally loud "Bach!" - And the fountain of boiling water causes an attack of sociability at the neighbors from the bottom, and at the same time hesitate all the electronics and books at home.

So, reinforced polypropylene pipes thanks to the notorious "frame" are not even started to deform. In fact, such as continuous heating does not swell, but simply stands down, reaching the temperature in 175 C.
However, it does not interfere with manufacturers to declare the operating temperature for them in the same 95 C. Biggled God protects.

Types of reinforcement

Undoubtedly, in the coming years, manufacturers will delight anything else; In the meantime, reinforced polypropylene tube can use two main material to increase its strength: aluminum and fiberglass (Fiberglass).

Aluminum

Polypropylene tube aluminum reinforced, in addition to diameter, can be different in the location of the reinforcing layer. It can be for polypropylene by an outer shell, and may be hidden between polypropylene layers. In the second case, the presence of reinforcement can only be determined when looking at the cutting pipe.

Layers of aluminum foil (this is the foil; unlike metal plastic pipes, Metal here is a thick of from 0.1 to 0.5 millimeters) is connected to the polypropylene glue. The quality of the adhesive compound along with the composition of the polypropylene itself and the foil thickness determines the quality of the pipe. Alas, it happens that under certain conditions, cheap and low-quality pipes are separated. The strength at the same time, you understand, suffer.

Fiberglass

Alternative aluminum is fiberglass. Polypropylene tube reinforced with fiberglass is an absolutely different design than the previous option. If it seems to you by analogy, covered with a mesh glue - you are mistaken.

Inside and outside such a pipe is in fact polypropylene, but in the center - fiberglass; However, at the same time, all the layers of the pipe are, as a rule, three are monolith.

The fact is that when they are manufactured reinforced fiberglass Polypropylene pipes, the middle layer is welded with the inner and outer - after all, it is based on the same material, only the fiber fiber pre-kneaded with the fibers is the fiberglass. Two in one: polypropylene glues the fiber, and they do not give it to deform.

FEATURES OF MONTAGE

The principle of assembling a water supply system or the heating system from reinforced pipes is the same as in the general case: the pipes are cut into size, the chamfer, pipes are removed, pipes and are heated by a special simple soldering iron, after which they are combined at one point-time point. A few seconds - and instead of two parts, one, completely monolithic.

However, there is also a difference: aluminum reinforced polypropylene pipes require another technological operation. This is a stripping. Before you feed the pipe into the nozzle, it is necessary to remove the aluminum layer. Nothing complicated: the pipe is inserted into a simple coupling with knives, one or two turns - and everything is ready.

For pipes with an aluminum layer inside the tool is used a slight cunning - a carrier. It chooses the inner layer from the end of the pipe so that the end is securely weld with the fitting.

This ensures that the pipe:

Will not flax;
That aluminum will not be destroyed by electrochemical processes that begin in the presence of metals and at least some potential difference.

And what about polypropylene fiberglass pipes?

And nothing. From the point of view of welding with the fitting, their inner reinforcing layer is no different from polypropylene. And if so - no additional operations needed.

Real strength

What pressure can withstand reinforced pipe?

This is determined by its belonging to a specific class. It is worth considering the water temperature. Thus, the PN25 polypropylene tube reinforced on cold water, as it is understood by its marking, it works for a pressure of 25 kgf / cm2 (the actual destruction of the pipe, by the way, occurs when twice the larger pressure). However, for water heated to 90 s, the calculated pressure is reduced already up to 9 kgf / cm2.

Appearance

It is reliable to know, there is reinforcement in the pipe and if so, what type, you can look at its cut. Aluminum-reinforced polypropylene pipes have a thin layer with a metal glitter (we, of course, are talking about internal reinforcement. There is no doubt no doubt).

Polypropylene tubes reinforced with fiberglass are highlighted by the presence of three layers of approximately the same thickness, of which the average has a bright color marking. Color does not say anything about the characteristics of the pipe. The manufacturer chooses it exclusively on the basis of its feeling of excellent 🙂

disadvantages

FROM aluminum reinforcement Everything is clear: it needs to be cleaned, and it can be detached. And what is polypropylene reinforced fiberglass pipe? Is she - literally manna heavenly?

In general, yes. The disadvantages of polypropylene pipes reinforced fiberglass are presented for the most part. These include the fact that the pipe allows atmospheric oxygen Put the coolant, which causes, say, accelerated corrosion of metal boilers. However, no sense of convincing numbers leads to the critics.

conclusions

It seems that we have defined an explicit favorite. Cheap, durable pipe that does not have any significant problems. We hope to choose from it as a material for home water pipes will not disappoint you.

The advantages of polypropylene pipes led their high demand in the segment of plumbing products of the global market. However, without flaws, it did not cost. In particular, they have a high coefficient of linear expansion. Therefore, the plants have mastered the production of products reinforced by the reinforcing layer. They are used for heating and water supply systems. Polypropylene pipes reinforced by aluminum are especially popular.

Reinforced pipes from polypropylene are used in heating systems with high heat carrier temperature

Properties of polypropylene pipes

These products have increased resistant to the effects of chemically aggressive compounds and demonstrate a very long service life. They are characterized by the absence:

corrosion raid;
rust;
lime deposits;
rotten.

An important factor that caused popularity is the immutability of their diameter, and, accordingly, the stability of the capacity of the pipeline as a whole. Well, of course, the fact that, on all over the operation of polypropylene pipes, their inner surface remains almost smooth. Such products in winter are prone to sagging. However, the use of thermal insulation for polypropylene pipes allows partially to solve this problem.

Depending on the manufacturing technology, polypropylene tubes are able to withstand various pressure. According to this criterion, they are divided into several species.

PN10. This is a thin pipe with a service life of about 50 years. It is used in cold water supply systems. Rated pressure up to 1 MPa.

PPR pipes are different diameters: the thinnest suitable for systems with low temperature of the transported fluid

Standard dimensions Polypropylene pipes are presented in the table.

Table 1

Helpful information! On the basis of pipes PN10, the creation of a "warm floor" with a temperature of the coolant, not exceeding + 45 ° C.

PN20. The pipes of this category are used for hot (the temperature of the coolant to + 80˚С) and cold water supply in industrial and residential buildings. Rated pressure - up to 2 MPa. Service life - about 25 years.

Below are the standard geometric characteristics of PN20 polypropylene pipes.

table 2

PN25. It is in this group that the products reinforced by aluminum are included in the installation of hot water and heating systems. Rated pressure - up to 2.50 MPa. Such a pipe is suitable for hidden and open strip, inside and outdoors.

Standard sizes of polypropylene pipes PN25 are presented below.

Table 3.

Compared to metal, polypropylene pipes have two serious disadvantages. It:

Increased oxygen permeability.
High thermal linear expansion coefficient.

But the reinforcement of polypropylene structures solves these problems.

Aluminum interlayer, which is inside the pipe, gives the product a special strength and resistance to high pressure

Features of the reinforced aluminum polypropylene tube

Polypropylene reinforcement gives the final product following positive characteristics:

contact with overheated medium does not cause rigidity loss. The body of the unmarked polypropylene tube during transportation under pressure overheated medium can simply collapse. By the way, that is why this type of type is not used in hot water supply;
the starting material becomes less plastic. High elasticity of polypropylene is insignificant in open systems. However, non-controlled increase in the dimensions of the pipe, mounted in the solid overlap of the wall or floor, when entering its cavity, the fluid can cause the formation of cracks on the support surface. And due to the presence of a rigid carcass, a polypropylene reinforced pipe, no deformation will occur.

This product can be used to create heating systems: this pipe will not start swell at + 120 ° C. In this case, the allowable limit value is approaching 175 ° C.

Moreover, even such an extremal heating will only cause rigidity loss, as a result of which the pipe will prove, but its integrity will continue.

Reinforced pipes do not succeed under the action of temperature and system functions without failures

Tip! The above shows the experiments performed in the laboratory conditions. In practice, it is better to avoid transportation of fluids with a temperature greater than + 95˚С.

However, in terms of the possibility of exploitation in the "hot" water supply systems and heating systems for polypropylene pipes, reinforced by aluminum, this restriction is not critical. After all, even the water "on the way" is so hot in the boiler to + 100 ° C, and these engineering communications comes with a temperature of order + 95˚С.

Methods of reinforcement

Most often, the work on the reinforcement of polypropylene pipes is carried out in such a way that the edges of the aluminum follicle are mounted. At least, many domestic producers were adopted by many domestic producers, and there was also sufficient development today, welding foil stuck with a laser. Such execution ensures the absence of contact of the coolant with the reinforcing layer. At the same time, welding the junction of the pipe and fitting remains consistently high-quality.

At the initial stage of development of this technology, reinforcement was performed solid aluminum foilthat prevented the oxygen in the coolant and gave the outer surface of the pipe exceptional smoothness. But at the same time there were serious difficulties with foil foil to polypropylene layers. In this regard, in the production of pipe-reinforced pipes, special requirements are presented to the quality of glue and to moisturely, as well as the temperature regime.

The use of perforated aluminum foil in PP pipes reduces the risk of pipe deformation under the action of condensate

The above-described method of manufacturing this product is inherent in another drawback. Polypropylene is hygroscopic, so moisture penetrates through its walls inside the construction, but then the foil layer it cannot pass. As a result of its accumulation on the surface layer, unnecessary bloats are formed.

To exclude this phenomenon, today the aluminum foil is used for reinforcement. That is, round holes are uniformly located at its entire surface. This method provides durable bonding between the decorative and base layers of the polymer over the entire area of \u200b\u200bthe product. Manufacturers ensure that the operating characteristics of the polypropylene tube reinforced by aluminum obtained under this technology will ensure the life of cold water structures 50, and with hot - 25 years.

Is it necessary to insulated with polypropylene pipes reinforced?

This question is quite natural. After all, polypropylene is not subject to corrosion. In this, in fact, it is the main advantage of pipes made from it compared to metal products. However, in the case of outdoor gasket, the insulation is also needed. Due to her:

the level of heat loss during the cold season is reduced. Engineering communications are laid out and outdoors, not just indoors. Therefore, without insulation for polypropylene pipes, including reinforced by aluminum, most of the heat along the way to the destination will simply disappear;
condensate cooling. This concerns cold water supply. On the surface of products of this type compared to their steel "colleagues", condensate is also formed, but in a smaller volume.

For heat insulation of PP pipes, you can apply the ready-made "shell" from pressed synthetic material.

Important! When minor precipitates are observed, the difference in temperatures can also cause such a phenomenon. Therefore, heat protection is needed anyway.

The list of products for insulation of polypropylene pipes reinforced by aluminum, the same as for ordinary products. These are the following materials:

glasswater. Such insulation is the most affordable value. Glasswater is not afraid of nor temperatures, no fire. At the same time, it is inherent in good insulation characteristics;
polyethylene foamed. Most often produced in the form of a single-sided sleeve. Many of our compatriots prefer this insulation for polypropylene pipes due to the ease of its installation;
polystyrene foam (foam). Due to the low thermal conductivity, experts consider it one of the most efficient insulation;
polyurethan. In appearance, it resembles a traditional foam, but differs in the structure of the cells. It is most often present in the form of a shell.

Polypropylene pipes reinforced by aluminum, thanks to its exceptional qualities and characteristics are in high demand. Right choice And competent installation will save you from problems during the entire period of their operation.

trubamaster.ru.

Features of reinforced polypropylene pipes

The popularity of plastic pipes on a global scale grows from year to year. The advantages of plastic pipes are obvious. They are more convenient when installing and maintaining, compared with other materials. Used for different purposes. It is a water pipe for cold and hot water, heating systems, etc. At the moment, polypropylene pipes reinforced by aluminum are especially popular.

Polypropylene pipes have high durability qualities, high temperatures and chemicals resistance.

Polypropylene Pipes (PPR)

Polypropylene pipes have high durability quality, high-temperature resistance and chemicals, compared with other frequently used materials used for product production.

Since they are characterized by the absence of rust, corrosive fly, dirt, rotting, various bacteria (these qualities can be used for drinking water), lime deposits, the diameter of the pipe from polypropylene after time does not decrease in size, the inner surface remains smooth, and bandwidth Does not change while in a stable position.

If we consider polypropylene pipes with conventional plastic, then the coefficient indicating the extension (ordinary structures) is 10 cm about m, if you enlarge temperature mode Somewhere on degrees 70. The same coefficient of polypropylene (reinforced) systems is about 1 cm on m. The difference is obvious.

The usual tube allows for sagging in winter (when exposed cold temperatures).

It looks pretty uneatetic. Only mounted heating creates a pleasant impression, but in winter, when heated, the eye does not please, which cannot be said about the use of the parts reinforced by aluminum. Them appearance is in perfect condition round yearEven in winter.

Traditional are 4 main types of polypropylene pipes:

Polypropylene PN 25 reinforced with aluminum, suitable for the device of heating systems (possibly use for cold water).

PN10 used for cold water (use for hot water is excluded);
PN 20, used for cold and hot water;
PN 20 reinforced with fiberglass, suitable for heating and water supply systems with hot water (It is possible to use cold water);
PN 25, reinforced with aluminum, are suitable for the device of heating systems (possibly use for cold water).

Polypropylene products due to its positive qualities, successfully used in the device of the water supply system (using cold and hot water) and heating in the construction industry and others.

If comparing polymeric products (for example, polypropylene) with metal, it is safe to say that in systems from polymeric materials, higher rates of thermal linear expansion and oxygen permeability.

But this problem is easily solved by the reinforcement of polypropylene structures using foil (aluminum).

For which polypropylene tubes are reinforced. Methods of reinforcement

In the production of works on the reinforcement of polypropylene pipes with the help of aluminum foil, its edges are most often attached to the penetration pipes.

Such a technology is used for elements from polypropylene in a large number of domestic producers, although today has received its sufficient development of the Welding Laser Laser Foil Job. Reinforcement Foil Vangest requires foil stripping before welding with connecting reinforcement.

There are two ways to reinforce polypropylene pipes by aluminum foil: edges are attached to jack or braziness.

With this performance, the coolant is not in contact with the foil, and the welding of the compound of fitting and the pipe does not become less high-quality. For the systems of type Rh / AL / REH, the foil compound is considered to be the foil method.

At the very beginning of the technological development of the reinforcement of polypropylene pipes, an aluminum foil was used in a solid version. Such reinforcement does not allow oxygen to enter the coolant and gives the external surface of the pipe with the property of smoothness. But at the same time its compound with polypropylene layers is difficult.

Due to these features of the foil, the quality of glue, as well as to the temperature and humid modes, specific requirements are made in the implementation of industrial work.

If technological disorders or retreat from the generally accepted qualitative standards of the raw materials used in the manufacture of pipes reinforced with aluminum, the following situation becomes possible: the moisture penetrates through the wall of the polypropylene design (as this material is hygroscopic), and then, meeting the foil layer on the way can not. Moisture accumulates between aluminum layers and polypropylene, which contributes to the unnecessary formation of fuses on the surface layer.

The stratification of the multilayer pipe can be due to the fact that when welding only the outer layer, water affects the end part of the pipe, and over time it smells it.

In order to avoid such situations, currently polypropylene tubes are subjected to reinforcement with the help of aluminum foil with perforation, that is, with evenly located along the entire surface of the foil round holes.

This method of producing reinforced polypropylene products provides a durable bonding of two layers of polypropylene (decorative and basic) among themselves throughout the surface area.

The guaranteed service life for polypropylene reinforced elements is denoted as 25 years when interacting with hot water, 50 years old - for cold water structures.

The method of central reinforcement of polypropylene pipes

Polypropylene pipes with reinforcement of the "Vangest" method (they were told above) have one essential disadvantage in terms of the convenience of installing installation (welding directly). This is the so-called trimming of pipes before welding works, in the process of which the upper layer of aluminum and the outer decorative layer of polypropylene occurs. To simplify this process, many manufacturers produce products with central reinforcement (RPR / AL / PPR).

The preparation scheme of the reinforced polypropylene tube to the soldering

The disadvantages of these pipes include the need to carry out the construct ends to prevent the contact with the coolant.

If these actions are not conducted (transportation) and the installation of the pipeline is performed using a conventional nozzle, then the coolant for operation appears the ability to penetrate the space formed between aluminum and polypropylene. And this will definitely lead to blurring surface.

Such a defect can cause damage to the pipeline, since the decorative layer of polypropylene is very thin, not durable enough and cannot withstand such loads. His destruction will inevitably come, which will lead to leakage of thermal carrier and emergency.

It can be assumed that the procedure providing for the transportation when performing installation work with central marmated pipes is required. But it is impossible to check the quality of the above-described operation in the already mounted pipeline. It remains only to hope for the professionalism and decency of the installation workers.

But it happens that even professionals, trusting false advertising of unfair suppliers or sellers, they themselves are confident that such products do not need a preliminary stripping. By the way, there are special nozzles so that high-quality welding is carried out without moving the ends.

When using special nozzles, the carriage or stripping of pipe ends is not needed.

The design of the above nozzle is as follows.

The nozzle is arranged in such a way that the inner and outer surfaces are suspended. If there is no warm-up with innerPolypropylene layer will close the aluminum layer.

In order for the nozzle successfully worked, its design provides for a special hole intended for the output of air that has fallen into the space between the pipe itself and the nozzle, which is welding, during the heating process. Another feature of this hole - visual control Behind the warm-up process.

So, when using special nozzles designed to ensure that the welding is high-quality, the carriage is not made of pipe ends. The advantages of such nozzles are obvious.

For a disadvantage, it is possible to calculate a slightly enlarged time, released on the heating of the pipe from polypropylene, as well as accurate (permissible deviation from 3 to 5 degrees) Positioning the pipe in a horizontal position while in the nozzle at the moment when welding is carried out.

https://experttrub.ru/youtu.be/e0zokvvrvik.

Types of transportation of pipes reinforced by aluminum

Mainly installation technology plumbing system (cold and hot water) or the heating system using reinforced products is the same for everyone. Standard actions:

cutting parts according to the desired size;
chamfering;
heating system and fitting by a special device;
combination (welding) and so on.

But there is a significant difference. This is the need for an additional procedure designed specifically for reinforced by aluminum systems - stripping. Before performing steps to heat the design and connection, it is necessary to clean it from aluminum layer.

You need to insert a cut of a pipe into a special clutch with knives, make a pair of revolutions, and the pipe is ready for further actions. For centralized pipes, a slightly more complex tool called the "Torker" is applied.

With it, the inner layer of aluminum, located in the end of the pipe, is easily readily. This ensures the reliability of the compound with the fitting. Accordingly, the bundle of the pipe and the destruction of the aluminum layer will follow.

Polypropylene pipes reinforced with aluminum for heating: Characteristics, manufacturers and video installation (welding)

Already 180 years old hot water in heating systems is served by steel pipes. However, in recent years, these steel products are quickly replaced with metal-plastic. Polypropylene heating pipes reinforced by aluminum is the most common type of this product - give an annual increase in production and sales of 15-20%. What are such violent changes related to?

Let us try to deal with the technical characteristics and advantages, features of installation and application, as well as with manufacturers offering this product.

Characteristics of polypropylene pipes (PPR-AL-PPR) for heating

Polypropylene (abbreviated PPR) is resistant to many chemicals. Alkali practically does not affect it even when heated. For central heating systems, this property is important, since alkaline reagents are added to prevent scale formation into water.

In contrast to polyethylene, polypropylene has much more high temperature Melting (at least + 140 ° C), therefore does not lose strength when contact with hot water. PPR is not subject to corrosion, does not rot, the smooth inner surface of the pipe from this material remains unchanged for many years, therefore deposits that narrow its lumen are not formed.

However, polypropylene is not the perfect material. The coefficient of its linear temperature expansion kp \u003d 0.15 mm / MK, whereas for aluminum this indicator KP \u003d 0.022 mm / MK. This means that polypropylene tubes, heating with hot water, are significantly led and deformed.

Air oxygen at elevated temperature, penetrating the material, with time, destroys polypropylene, giving it fragility.

Oxygen is also dissolved in the coolant and destroys other materials of the heating system. The oxygen permeability of polypropylene products is large and is about 2 g / m³ of a day.

Aluminum, in contrast to PPR, racks to the action of oxygen and prevents its diffusion from the air to the coolant, expands much less when heated, but unstable to the action alkalis.

The idea to combine these two substances by creating composite material from them, turned out to be fruitful. The polypropylene tube began to glue the layer of aluminum foil, and then apply a protective-decorative layer of polymer on it. Aluminum-reinforced pipe from polypropylene received new properties:

coefficient of thermal expansion KP \u003d 0.03-0.05 mm / MK;
oxygen permeability 0.056 g / m³ day (for perforated foil).

Due to these properties, the reinforced plastic pipes serve for heating at least 25 years in hot water systems, and in cold water systems - at least 50 years. Composite pipes for heating with the PPR-Al-PPR structure are called thermal stable.

Technology of manufacturing plastic reinforced pipes

The reinforced products with the PPR-Al-PPR structure consist of an internal polypropylene tube, a layer of aluminum foil and an outer layer of plastic that performs a protective decorative function. However, this does not mean that the pipe is three-layer. In fact, the layers are five: before reinforcing the foil and applying the protective layer on the product, a layer of thermoclaus is applied to the product.

Reinforcement of foil in production is made in two ways: brass and jack. The first way uses most russian manufacturers. In this case, before welding edges foil requires a mandatory stripping. According to the second method, the foil edges are welded with a laser. Under technology, the choice of method of reinforcement on product quality is practically not affected.

Since the beginning of the production of reinforced pipes, a solid aluminum foil was applied to the polypropylene framework. The reinforcement of the solid layer of aluminum practically eliminates the access of air oxygen into the coolant.

However, the connection of a solid foil with a polypropylene with a thermoclaus is not absolutely reliable. With ne. proper montage Systems The coolant can penetrate between layers of aluminum and plastic, causing the bundle of the composite, the bloody of the plastic, and then the breakthrough of the coolant outwards.

Currently, the reinforcement of polypropylene pipes is performed perforated with foil. According to this technology, when a second layer of polymer is applied to the foil surface, it is securely connected to a plastic pipe through the holes. Thus, a strong compound of all layers in a single monolith, resistant to bundle, is ensured. Due to the fact that the aluminum layer is not solid, the oxygen permeability of the finished product is somewhat increasing and is about 0.056 g / m³ of a day. However, due to the fact that the area of \u200b\u200bthe holes does not exceed 3% of the total area, this indicator is significantly lower than that limit that resolves SNIP 41-01-2003, clause 6.4.1 (no more than 0.1 g / m³ of day).

Scope of application

The use of PPR-Al-PPR polypropylene pipes is widespread in the system of heating of household and industrial buildings, warm floors and hot water systems. With the right installation, the service life of such pipelines is at least 25 years. The same pipes can serve in cold water supply systems. In this case, they serve at least 50 years.

PPR-AL-PPR Pipe Mounting Features

Installation of the heating system from metal-plastic elements is made using welding. The peculiarity of the welding of reinforced polypropylene pipes is that when the fitting compounds, it is preliminarily eliminated by the possibility of penetrating the coolant to the aluminum layer on the end. If you do not carry out this operation, then during operation, the coolant penetrates between layers of aluminum and plastic and causes bloating, and then a breakthrough of the upper protective layer.

Welding technology consists of such operations:

Slicing details in size.
Stripping end from the aluminum layer.
Heat pipe and fitting in a special "soldering iron".
Combining parts before setting.

Stripping the protective layer of plastic and aluminum foil is performed using a special knife clutch. To clean the end of the pipe with the central reinforcement, where the inner and outer layer of polypropylene is approximately equal in thickness, a special "carrier" is required, scraping aluminum between plastic layers. In this case, when welding the inner and outer layer of plastic on the end is melted together, reliably insulating aluminum from the coolant.

Video: "Installation of plastic pipe PPR-AL-PPR"

What is an extruder device for plastic? How do products from plastic are formed using this device?

What advantages form the price of liquid plastic? About this, as well as about other characteristics of this material, read in the next article.

Extrusion acrylic - modern material widely used in various fields. Read more about him further

Manufacturers of polypropylene pipes abroad and in Russia

The manufacture of polypropylene pipes with aluminum reinforcement is engaged in many companies in different countries of the world, so make a rational choice when buying is very difficult. If you search for assessments of installers on the forums on the Internet, you can make a rating of popularity of this product.

Led list of polypropylene pipe manufacturers german firms Banninger and Aquatherm are the best manufacturers. Wefatherm and Rehau follow them. The German tubes of the Stabi series are considered the products of the highest quality, therefore the cost of their highest. These products withstand the temperature of + 130 ° C and pressure up to 20 bar.
The second place is occupied by the products of Czech companies Wavin Ekoplastik and FV-Plast. Reviews of their quality are no less enthusiastic, but nevertheless they are inferior to German.
In third place are Turkish companies TEBO, VESBO, PILSA, VALTEK, KALDE, FIRAT and JAKKO. They produce their products in German technology, but the quality of German is inferior. So, if they were operating, they are not advised to raise the temperature of the coolant above + 95 ° C - their thermal stability is lower than that of German. Sometimes in the cross section of Pilsa and Firat companies are oval, because of which their stripping has to be repeated. Prices for these products are respectively lower.
The fourth place is occupied by Chinese Blue Ocean and Dyzain manufacturers. Blue Ocean products are sufficiently high quality, although the outer diameter may differ slightly even within one batch. The inaccuracy of the outdoor markup is noted. Dyzain products are not inferior to European quality, but significantly cheaper, thanks to which they are successfully sold in the Russian market.
Fifth place in popularity from Russian manufacturers RVK, Pro Aqua, Santrade, Heisskraft and Polytek. Pro Aqua products exceed similar Chinese by strength 1.6 times, withstanding pressure up to 79.5 bar, due to which they are considered high-quality products. RVC products give a low estimate due to instability of sizes. The Heisskraft pipes produced in German technology in the Moscow region are considered good products, although their cost is significantly lower than German. The quality of products of Polytek is estimated as "average", and Santrade products are still known to few people.

Russian production of reinforced pipes is just beginning to develop. In the coming years, domestic products should take a worthy place in the Russian and world markets.

promreSursy.com.

Polypropylene reinforced pipes for heating: their features

This article will consider polypropylene pipes for heating reinforced, the purpose of the reinforcing layer, the production of reinforced polypropylene pipes and the main varieties of the reinforcing layer of aluminum.

Polypropylene tubes began to gain popularity at the end of the twentieth century, but it can be assumed that the peak of their popularity has not yet come. Currently, this segment of the construction market is growing faster than all others both in terms of quantity and financial terms.

Reinforced PP pipes

When writing this article, there was no goal as much as possible about the installation and features of the exploitation of polypropylene systems (for this, see the welding of polypropylene pipes, a soldering iron for polypropylene pipes), analyzing similar polypropylene materials and describe the benefits of polypropylene in front of such materials, such as, for example, carbon steel.

We will try to tell about the methods of manufacture and features of the installation of polypropylene composite pipes, namely reinforced pipes from polypropylene.

Reinforcement of polypropylene pipes

Reinforced PP pipes for heating

If we consider polypropylene pipelines systems from the point of view of their performance and physical and mechanical qualities, it should be noted that such pipes are practically not inferior to pipes from materials such as polybutylene (PB), stitched polyethylene (RS) and chlorinated additionally polyvinyl chloride (C-PVC ), although they differ in a number of features.

One of the most important reasons why polypropylene engineering systems have become so popular, is a fairly low price of pipes and fittings.

Polypropylene reinforced pipes for heating have a reinforced (enhanced) structure consisting of several layers formed by an additional layer of aluminum foil.

Most often, the pipes reinforced in this way include 5 layers: a layer of aluminum is placed between two layers of polypropylene, which is fastened with polypropylene two layers of adhesive, that is, glue. The thickness of the aluminum reinforcing layer in the case of the most common pipe diameters constituting from 20 to 63 mm, is usually 0.1-0.5 mm.

Production of pipes

Polypropylene reinforced pipes

Polypropylene pipes reinforced for heating are produced only by manufacturers and not reflected in the latest standard GOST R-52134, adopted in 2003.

Therefore, both the thickness and the depth of the aluminum aluminum layer in the polypropylene tube can differ, as well as the thickness of the pipe walls. GOST prescribes only the method of calculating pressure and testing of pipes, which is determined - which pressure should withstand the pipe in accordance with its nominal working pressure, the wall thickness and diameter.

Therefore, many plants manufacturing pipes for heating polypropylene reinforced plants are placed on the reinforcing aluminum layer only two functions:

Diffusion barrier preventing oxygen penetration into the heating system;
Reducing linear pipe expansion.

Other plants make pipes into which the aluminum layer additionally increases strength, increasing and nominal pressure, for example - PN25 instead of PN20, depending on the thickness of the walls of the pipe or mass of the route, as well as from the thickness of the foil used.

Example of heating

Due to the significantly increased demand for polypropylene tubes, recently, many producers reduce the cost of their products due to savings on the quality of the raw materials used, that is, by purchasing low-quality raw materials or significantly increasing the amount of chalk and secondary raw materials added to the main raw materials.

The result of such a savings is the maximum reduction of pipe wall thickness and a significant reduction in the weight of fittings and mortgage brass parts. The finished products at the same time do not differ externally from high-quality products, only an experienced installer is capable of distinguish such a fake than many unfair manufacturers.

Next, the methods of reinforcement of polypropylene pipes will be considered in more detail, among which the method of forming the reinforcing layer is considered traditional by extrusion 2 of 5 different layers of polypropylene, which consists of a pipe. At the same time, the main layer is considered the main layer, and the outer layer of polypropylene protects the aluminum layer and fixes the overall structure of the pipe.

Types of aluminum layers

Reinforcing aluminum layer

Two main varieties of aluminum layers are distinguished:

With the presence of through holes (perforated foil);
Without through holes (smooth foil).

Holes are not performed in order to save material, but due to the fact that on the surfaces of pipes reinforced with a smooth foil, in the process of operation under the action of hot water, small swolings are sometimes formed.

These are the consequences of the fact that during the extrusion and applying a layer of metal under aluminum can penetrate the microparticles of water during cooling the inner layer of the pipe in the water bath before wrapping aluminum.

Important: The consequences of this defect are not critical, since they are deformed, and without break, only an outer polypropylene layer and aluminum foil, and the main inner layer remains intact.

Perforation of aluminum foil makes it possible to completely eliminate this disadvantage, which can be susceptible to reinforced polypropylene pipes for heating.

This may impress that foil perforation can cause penetration into the oxygen heating system, accelerating corrosion processes in heating devices (radiators). This problem simply does not occur in the case of the installation of polypropylene pipes reinforced with perforated aluminum, in heating systems of multi-unit standard houses, as well as in the case of replacement of steel polypropylene water pipes.

In this case, there is no individual heat points (ITP), that is, the water mixed in the heating system is not degassing, entering "enriched" oxygen. As a result, oxygen in any case penetrates the system either through perforation of the reinforcing layer, or directly from the thermal point.

Another way to eliminate small swirling on the outer layer of the reinforced pipe is the implementation of the reinforcement of aluminum in the middle of the pipe, and not near the outer layer, as usual. This allows you to solve all problems with bundles and swollen in such a way that they simply do not rush to the consumer.

What do you need an expansion tank in the heating system

Heating Systems for Heating Systems

When you come to the store behind a polypropylene tube, then the eyes are running out not only from the range and colors, but also arises one of the main questions: "What polypropylene to choose to choose? With or without reinforcement? ". We understand below

Polypropylene is such a material that is by its nature is subject to significant extension and expansion during heating.

Example:

The hot water supply system, long 10 m, is mounted at a temperature of 20 0 C, and on the pipe will be held water with a temperature of 100 0 C. With such a difference of temperatures, each meter of the pipe can be lengthened by 12 mm, respectively, with a pipe length of 10 m, the pipe stretches by 12 cm.

That is why during the design and installation of heating systems or hot water supply, this property of polypropylene cannot be ignored for a number of reasons:

the straight pipe will go ugly waves. Especially if there is a long section;
If the pipes are hidden into the wall, then the likelihood of a violation of decorative coatings on the wall is large.

Reinforcement of polypropylene tubes is made just to reduce linear expansion when heated. At the same time, something like a rigid frame is formed, which does not give the pipe to lengthen. In this case, the reinforced pipe does not become stronger, the framework serves only to reduce linear elongation. Is it worth choosing such a type of polypropylene? We read further about the types of reinforcement.

Aluminum from the outside of the pipe

Pipe with aluminum reinforcement

Aluminum layer does not give the strength of the pipe, since unlike metal pipes For the reinforcement of polypropylene, an aluminum foil is used with a thickness of 0.1 to 0.5 mm. But at the same time perfectly solves the problem of linear elongation. As mentioned above, if without reinforcement of the 1 m polypropylene tube, during heating, it is necessary to lengthen almost 12 mm in the same conditions during the reinforcement of aluminum from the outer side, the pipe will change its length only by 2 mm.

Aluminum foil with polypropylene is connected using a special glue. The reinforcement of aluminum from the outside occurs in such a sequence:

The polypropylene tube is a layer of glue - aluminum foil - layer of glue - a layer of polypropylene.

The quality of the adhesive compound and the polypropylene itself affects the durability and service life of such a pipe.

The advantages of the reinforcement by aluminum from the outside:

The linear elongation of the polypropylene tube is significantly reduced.

Disadvantages of reinforcement by aluminum from the outside:

Over time, in some sections of the pipe can form a bloat.

Externally, it seems that the pipe will soon break up, but in fact it is not. Only an outer thin layer of polypropylene, which covers aluminum foil.

Manufacturers of polypropylene pipes allow such bloats, as this does not affect the strength of the pipe itself. The main thick layer of polypropylene remains not damaged. Swimming can be formed due to residual moisture during production. This lack is not necessary, the system will continue good job And further in spite of a non-primary look.

The outer layer must be cleaned before welding as the outer diameter of the polypropylene tube with aluminum reinforcement is greater than the usual.

Aluminum from the inside of the pipe

This method of reinforcing a polypropylene tube is one of the solutions to eliminate external fuses. Although with this method, there is still a potential risk of a swollen layers, with a difference only that this will not be visible to the user. With such small swolves, the system will continue to work further.

The advantages of the reinforcement by aluminum from the inside:

The polypropylene layer between reinforces is quite large and it is much heavier to swell.

Disadvantages of reinforcement by aluminum from the inside:

Possible collapse of weak sections of the polypropylene tube inside if you make an error during the design or operation of the system. What will entail a violation of the work and the integrity of the system.

Polypropylene with fiberglass

The most popular reinforcing layer at the moment is fiberglass. Choosing a polypropylene with fiberglass you will see that inside and outside such a polypropylene tube, and the central layer is fiberglass. However, all three layers are a single whole, since the central layer of fiberglass is made on the basis of polypropylene mixed with glass fibers. Linear elongation of such pipes is slightly larger than during the reinforcement of aluminum foil and is about 2.5 mm at a length of a pipe in 1 m.

Polypropylene with basalt fiberglass

Polypropylene pipes with reinforcement from basalt fiber is the newest type of fourth-generation pipes. Choosing such a polypropylene, keep in mind that the linear elongation of such pipes is the same as during fiberglass reinforcement. However, this type of reinforcement has a number of significant advantages:

High heat resistance and resistance to pressure drops.
High strength pipe.
Such a pipe has a greater internally flowing section and, accordingly, a smaller thickness of the wall.

There is no particular difference in which polypropylene tube you will choose, reinforced with fiberglass or basalt, does not affect the characteristics. Difference only in manufacturing technology. There are many companies that produce polypropylene pipes with the same specifications, but in different reinforcement.

So what is the polypropylene better?

The pipes without reinforcing aluminum foil are much easier to be mounted. Such pipes do not need preferred Before welding, do not blow and do not collapse. Then the question arises why having a number of significant drawbacks this type of reinforcement is still used? In fact, there is such a concept as "oxygen permeability". The air that penetrates through the pipe walls falls into the coolant. The air in the heating system can harm it, as the chance of the appearance of the corrosion increases. Polypropylene tubes reinforced by a solid layer of aluminum foil completely not permeable for oxygen. The pipe reinforced by perforated aluminum passes oxygen, but not in such volumes as a pipe without reinforcement at all.

Now it began to use pipes with a layer of ethylene-bird alcohol as an oxygen barrier from the outer side of the pipe, which prevents the penetration of oxygen into the coolant. It can be concluded that soon the pipes with the reinforcement of aluminum foil will simply stop producing. Because there are other types of reinforcements that do not have the same flaws like this.

Conclusions:

The reinforcement is needed to compensate for linear elongation when heated.
The reinforcement exists from aluminum in the form of a solid foil outside the pipe and inside. Perforated aluminum - outside.
The reinforced tube with fiberglass or basalt replaces aluminum reinforcement in water supply systems. Additional antidiffusional layer makes it suitable for mounting in heating systems.

What polypropylene is better to use?

Relying on the information received, you can clearly imagine for what and which reinforcement is necessary. In each case, determine the most favorable option for yourself. Somewhere can be purchased polypropylene pipes with aluminum reinforcement to compensate for oxygen penetration. To quickly install the system, choose polypropylene basalt or fiberglass reinforcement, if it comes not about heating systems.

Water supply, heating in the house or apartment (autonomous or centralized) is not without the use of pipes. Many people remember how metal pipes look unattractively, they need to constantly paint, maintain and still at any time they can bring the owner of the housing, because over time they react to temperature differences and pressure are worse.

The metal is pretty quickly from the inside is covered with screaming, which significantly slows down the movement of hot water and, as a result, reduces heat transfer. Probably, all minuses of metal pipes pushed scientists, engineers and technologists to develop and introduce new models of pipes manufactured from modern materials According to advanced technologies.

Manufacturers of polypropylene reinforced pipes

It is no secret that when buying pipes, considerable importance is the choice of well-proven itself in the Russian and international producer markets. Today we will present some popular brands specializing in such products.

FV Plast (Czech Republic)

The company specializes in polypropylene for heating, hot and cold water supply, heating. The company's products are available only in gray with aluminum and fiberglass layers.

"Metak" (Russia)

The company produces various products from polypropylene, including reinforced fiberglass pipes under the brand "Metak Fiber". The company's products are ideal for highly loaded heating systems.

Banninger (Germany)

The German company produces excellent products that differ in the highest quality and reliability in operation. Buyer will easily find it on shop windows in emerald green color.

In conclusion, I would like to recommend our readers not to buy reinforced polypropylene unknown companies that do not even indicate the name of their brand on marking. Saving a small amount when buying, you can lose much more money (nerves, time), when low-quality products will be submitted. And it happens, as a rule, at the most inopportune moment.

Did you like the article? Share it

Print article