Types and application of asbestos-cement pipes. Asbestos-cement pipe

There are two types asbestos cement pipes– pressure and non-pressure.
Pressure pipes have an internal diameter of 50 to 600 millimeters. Their length is 5 meters. Such pipes are designed for high blood pressure– 6 or 9 atmospheres.

Asbestos-cement pressure pipes are characterized by durability and low hydraulic resistance. therefore, they are widely used in construction.

Pressure pipes are used when installing pressure water pipelines, laying gas pipelines, pressure irrigation and reclamation systems.

Asbestos-cement pressure pipes have found application in the construction of wells and wells. They are also used for covering outbuildings and for feeding troughs for animals.

The disadvantage of asbestos-cement pipes is their increased fragility, which causes inconvenience during the installation process.

Pressure pipes are used in the construction of pressure sewers, siphons and sludge pipelines.

Non-pressure asbestos-cement pipes can be from 2.95 to 5 meters in length. The internal diameter can vary from 50 to 500 millimeters.

Such pipes are used for installation of external non-pressure pipelines utility networks– sewerage, chimney, garbage chute, air outlet.

Gravity pipes are also used as a shaft or duct when laying telephone and electrical cables. Since this type of asbestos-cement pipes has high electrical resistance and is not afraid of electrochemical corrosion.

Used as supports, posts and piles when installing fences and other barriers.

Advantages of asbestos cement pipes

One of the most important advantages of asbestos cement pipes is their durability. They can last 30-40 years.
Such pipes are resistant to corrosion and aggressive environments, they are easy to install and process. Asbestos-cement pipes are low cost and light weight. When listing the advantages of these pipes, one cannot fail to mention the lack of need to protect them from stray currents and groundwater.

Garbage chutes and sewage systems made from this type of pipes do not provide negative influence on the state of the soil and the environment.

Since asbestos-cement pipes have good heat-insulating characteristics, when constructing a water supply system, they can be laid to a shallower depth than cast iron or metal ones. The water in such pipes will not freeze when the temperature drops.

Asbestos is a mineral. Its main advantage is tensile strength. It is widely used for pipe production. An asbestos cement pipe consists of Portland cement and asbestos in a ratio of 85% to 15%. Depending on the scope of application, the products have a cross-section from 10 cm to 1 meter.

Types of pipes

Today you can buy two types of asbestos cement pipes:

pressure;
non-pressure.

The first type is designed for a load of 9 atmospheres. They are produced in accordance with GOST 539-80 and differ in diameter from 100 to 500 mm and length from 3.95 to 5 m. Such products are not heavy, but very durable. They are widely used for laying gas and water pipelines, ventilation, and garbage chutes. Self-sealing couplings are used to connect the pipe line.

Pressure pipes differ in the operating pressure. Depending on this indicator, there are 4 product registers:

VT6 – 6 kgf/cm2;
VT9 – 9 kgf/cm2;
VT12 – 12 kgf/cm2;
VT15 – 15 kgf/cm2.

Non-pressure asbestos pipes are manufactured in accordance with the requirements of GOST 1839-80. They are suitable for arranging collectors, sewers, and gas supply systems. The low weight of the products makes it possible to lay the pipeline in hard to reach places where it is impossible to provide access for large construction equipment.

Advantages of asbestos cement pipes

The products are fully suitable for laying both above-ground and underground communications. Due to their versatility, they perform well as piles, supporting structures, and fence posts. Metal and plastic pipes significantly inferior to asbestos in many respects. Firstly, they are expensive, and secondly, they have a shorter service life.

Among the main advantages of asbestos-cement pipes are:

Long service life. Regardless of the scope of application, the products can withstand 40 years of use without losing their qualities.
Resistance to external factors. They are resistant to corrosion and aggressive environments.
Easy to install. The pipes are easy to install and handle.
Light weight.
Increased thermal insulation. The products are resistant to freezing.
Maintaining appearance. Asbestos has repulsive properties, so pipes are not subject to fouling.

Installation features

Socket elements for asbestos-cement pipes are not produced. Their connection to each other is carried out using couplings, which are made from polymers or the same asbestos concrete. Each connecting element is equipped with sealing rings located inside, along the edges of the product.

Since the weight of the pipes is relatively small, installation of 100 mm products can be done manually using a jack. To lay thicker lines, it is necessary to use lifting equipment.

During the laying process in mandatory it is necessary to comply with all slopes within the norm. The pipe should lie tightly on the base. After installation, all connection points should be checked. If the couplings are not installed tightly enough, leaks may occur in the future.

If there is a need to purchase asbestos-cement pipes or other building materials, then the largest wholesale supplier of asbestos cement in Moscow is the AlfaCem online store. In the company's assortment large selection materials: cement, finishing compounds, pipes, slabs, fences for beds.

All goods are always in stock. We have our own fleet of vehicles, thanks to which orders are delivered to tight deadlines throughout Moscow and the Moscow region. Adequate prices allow you to buy products in the required volume at any time of the year.

Asbestos cement pipes are used for laying pipelines for communications for various purposes. The material for their manufacture is highly durable, and the inner walls almost do not accumulate plaque. Asbestos-cement pipes are in demand and are considered promising due to their main characteristics, which we will discuss later.

Composition of asbestos cement

It is the composition that determines the basic properties of products. The pipes are formed from a mixture of cement binder and asbestos fibers, which act as a reinforcing frame.

Asbestos is a mineral fiber that is not afraid of heat or dampness. For this reason, asbestos cement pipes are universal; they are made as non-pressure and pressure pipes, intended for service in different conditions temperature and humidity.

Along with asbestos, chrysolite (a type of asbestos) is added to cement.

The difference between chrysotile cement pipes and asbestos cement pipes lies solely in their environmental friendliness and safety. Asbestos is a more harmful component - it can cause allergic reactions, and with prolonged contact it provokes cancer. Chrysolite does not have such an effect, but it is also more expensive. However, there is no need to be alarmed: unpleasant consequences in practice, they are excluded, because the highways are buried in the ground, that is, contact with humans is excluded.

Characteristics

All pipe products made from asbestos cement must undergo a series of tests described in GOST 11310-90. To allow a product to be put into operation, it must meet several parameters:

water tightness test by filling the pipe cavity under set pressure. Non-pressure products must withstand flow for 10 seconds, pressure - 30 seconds;
bending strength and tensile strength are also checked in a water-filled state. The pipe is placed under a press, the pressure of which is brought to a given value. Within 10 seconds, the walls should not show any signs of destruction.

The pressure value for asbestos-cement pipes with different diameters and wall thickness are determined individually. Based on the test results, products are divided into 4 classes:

Size range

The standards for the production of asbestos-cement pipes are regulated by GOST 1839-80. The document establishes the main parameters of the products:

conditional passage;
wall thickness;
internal and O.D.;
product length.

The nominal diameter of the pipe is understood as the nominal diameter of the pipe adopted to describe products and pipelines made from them. In this case, neither the internal nor the external diameter may correspond to the nominal one. Table No. 1 of GOST 1839-80 shows the relationships between these parameters and the others:

The dimensions of asbestos-cement pipes may differ slightly from the specified ones:

for the outer diameter the deviation can be ±2.5…3.0 mm;
for wall thickness along the entire length of the pipe ±1.5...2.0 mm;
For total length products are permissible 50.0 mm except in cases agreed between the manufacturer and the customer.

Another parameter of the product – weight – depends on the dimensions. The weight of an asbestos-cement pipe can be determined conditionally due to the variability of the material: the walls tend to absorb moisture, which affects the parameter, and there may also be deviations in the formulation of the solution of cement and asbestos fibers.

Advantages

Today there are many types of pipes, but asbestos cement does not lose popularity due to significant advantages over other materials:

high bending strength (according to tests), withstand significant internal and external pressure compared to plastic and metal;
the walls do not contribute to the settling of sludge and the growth of clogged plaques, which eliminates the need for cleaning and repair;
the walls are resistant to corrosion on both the internal and external sides;
long service life of at least 50 years;
chemical inertness of asbestos cement to substances in any environment;
pipes do not freeze and are not destroyed due to freezing and thawing, so they can be laid in the ground at any depth;
relatively light weight;
affordable price.

Installation

Asbestos-cement pipes are connected using special couplings made of the same material and rubber seals, for which space is provided in the part. They provide absolute tightness on the highway.

The specificity of the installation is that it is impossible to create turning sections - only in the forward direction. Sewer lines are designed with this in mind. If rotation is still necessary, metal elbows are used to implement it, but the strength of the connection will not be as high as when using an asbestos-cement coupling.

How to connect asbestos-cement pipes to each other?

The coupling and pipe ends are lubricated with glycerin-graphite lubricant to facilitate the process;
A coupling is put on the pipe laid in the sewer, into which the seal is already inserted, and it is inserted along the entire length of the product;
Lay the second pipe and place the coupling on it, centering the latter in the middle.

Asbestos cement couplings are self-sealing; tightness is ensured by the pressure of the medium inside the pipe (for pressure pipes). In non-pressure systems, the connection is already tight.

Another way is to use a polyethylene MPT coupling. It is preheated in hot water, after which they quickly pull it onto the laid pipe, then pry up the second one. As the polymer hardens, it thickens naturally.

A cast iron flange coupling of the “Zhibo” type can also serve as a connector for asbestos cement pipes. The product is put on the ends of the pipes to be connected, then the flange is tightened.

Application

Asbestos pipes have a wide range of applications:

installation of sewer lines (non-pressure);
highways cold water(pressure products);
cable channels for optical and copper wire networks laid underground;
pipes can be used as piles for small private houses;
device drainage systems(for this, the pipes are perforated along the entire length);
chimneys for stoves and fireplaces.

Pressure water pipes and non-pressure sewerage are the direct and most common purpose of pipes made of combined materials. They also work well as a backbone for wired networks - they support optimal conditions humidity, sufficient tightness, as well as resistance to soil pressure and deformation.

Pipe piles for the home are an economical option for building small cottages. Hollow pillars are buried in the ground and filled with frame and concrete. Such supports are in no way inferior to columnar and pile systems.

The question arises: is it possible to use an asbestos-cement pipe for a chimney?

If we compare the chimney from different materials, asbestos cement is not the best solution:

the material can withstand heating only up to +300°C. Exceeding the temperature will cause the pipe to burst. For this reason, installing a chimney directly from the boiler is completely excluded;
condensate – real problem asbestos cement. The material absorbs moisture, which is saturated with fuel combustion products, and then released when there is a temperature difference. As a result, wet spots may “float” along the wall and roof. In addition, the caustic solution destroys the pipe walls over time;
It is impossible to remove soot from the pipe, and it accumulates at a decent rate. As a result, it often ignites;
installation of inspection hatches for pipe maintenance is impossible.

Also remember that asbestos is harmful to human health. Of course, the pipe can be installed outside the living space, where the smoke temperature is already acceptable. Nevertheless, the problem of condensation and soot removal remains relevant. The solution to the problem can be insulation and lining of the pipe.

Conclusion

Pipes made from asbestos and cement are durable, strong and inexpensive; they are an excellent material for installing straight-line water supply and sewerage systems, organizing a drainage system in the ground and a pipeline for cables within the city. The construction of a foundation from pipes with a diameter of 200-300 mm also does not cause concern. To organize chimneys, it is still not recommended to use asbestos cement if the house has a modern, efficient boiler (in the case of a regular old-style stove - please).

A modern plumbing network involves the use of new materials that have a long service life in the environment where they will be installed. It is not profitable to use metal products; this material also requires high quality maintenance. Now, when laying a pipeline, it is important to use asbestos-cement products, which have all necessary qualities and affordable pricing policy. Asbestos is used in many industries; this material has proven itself to be of high quality and durable.

Production and composition of asbestos-cement pipes

In nature, asbestos is a durable material that consists of a large number of thin fibers and belongs to the class of minerals. Asbestos is resistant to rupture, and the connection with cement allows you to create products with a long service life and good technical characteristics. This material used in many industries such as construction and rocket science. With a low content of asbestos and various impurities, the products have low price and gains wide popularity.

The composition of asbestos-cement pipes is as follows:

15% asbestos produced using special technology;
85% cement;
required amount of water.

When manufacturing asbestos-cement products, they carefully maintain proportions and ensure that the layer of mineral on the cement is uniform. Pipelines made from this material are produced various diameters, from 100 mm to 500 mm. Length finished products is also strictly regulated, can be 3.95 or 5 m. To connect the pipeline, special couplings made of the same material are used. The size of the couplings is slightly larger than the pipes themselves; this design is made to simplify installation.

The main advantages of asbestos cement pipes

Asbestos, in combination with cement, creates serious competition for materials such as metal and plastic, as it has a longer service life and lower price. In an aggressive environment, this product does not lose its useful qualities. Asbestos-cement pipes are very easy to process and their installation does not take much time.

Advantages of asbestos-cement pipes:

Do not corrode. Asbestos and cement are materials whose structure is not susceptible to rust, rot and the appearance of harmful microorganisms and bacteria. Since the pipes are located in the ground or other aggressive environment, this quality is very important.
Minimum expansion factor. After a long period of time and exposure to heat and cold, asbestos-cement pipes do not change their structure. Metal products are subject to constant temperature changes, which negatively affects their durability.
Low material cost. Asbestos, combined with cement and water, has a much lower price than metal or plastic, even the most low quality. The production of asbestos-cement products does not take much time and requires a small amount of equipment and workers.
Light weight. This criterion is very important, as it saves time and money when transporting finished products.
Low thermal conductivity. Because of this quality, asbestos-cement pipes do not freeze during cold periods of the year.
Long service life. The correct combination of asbestos and cement, as well as increased corrosion resistance, ensures the durability of the material.
Wide variety of products. This applies not only to the pipes themselves, but also to the couplings. Large quantity pipe sizes and internal diameters allows customers to select the most suitable options.
Easy to install. Asbestos can be easily cut construction tool, it is very convenient to drill. For installation, couplings are used, which do not require much time to secure.
No maintenance required. Asbestos-cement surfaces are not prone to the accumulation of harmful deposits, and the material itself does not require periodic cleaning or treatment.

In addition to the positive qualities described above, asbestos-cement pipes also have certain disadvantages. For example, the low strength of this material. If the proportions are not respected, then the pipes become fragile, which creates additional problems both during transportation and during installation.
Also, during manufacturing, it is not always possible to create the correct pipe diameter. This defect becomes noticeable only after the material has completely cooled. Sometimes the pipes may have a slight curvature. Wrong diameter and uneven surface are the consequences of poor styling.

How to prepare and install asbestos pipes

Asbestos pipes are quite easy to work with. It is necessary to have a minimum amount of tools and follow the recommendations.
Before laying the pipe in a ditch, you should make sure that the surface is smooth and has no bulges or sharp bends. If such defects are present in the ditch, the pipe may burst, since asbestos is known for its fragility. For a better effect, a sand cushion can be created at the bottom of the ditch. This will not only protect the pipes from mechanical damage during installation, but will also create an additional thermal insulation layer.
To cut asbestos-cement pipes, it is enough to use an ordinary hacksaw; to speed up the process, you can use a grinder. The only problem is the frequent replacement of wheels, since asbestos threads have a high density and quickly dull the tool. Also, this material lends itself very well to drilling, which makes the installation process faster.
To connect asbestos-cement pipes to each other, specially created couplings made of the same material or rubber are used. In order for the system to last long enough, it is necessary to ensure the correct circumference of the coupling and the pipe itself, as well as their tight fit to each other. The asbestos coupling is equipped with a tightening mechanism that simplifies the installation process. But rubber couplings have increased tightness, which means you don’t have to worry about the system leaking after installation.
The only one preparatory stage Before installation, the surface of the pipes is lubricated with a substance based on graphite or glycerin. These materials help simplify the installation of couplings and also serve as additional protection against leakage.

Scope of application of asbestos-cement pipes

Pipes made from this type of material are successfully used in many branches of construction. Asbestos is highly valued for its positive qualities, such as corrosion resistance and durability.
Asbestos-cement pipes are most popular when laying water supply and sewer systems. Their weight is several times less metal products, and installation is not particularly difficult.
It is very beneficial to use asbestos pipes in the construction of drainage systems, since asbestos lends itself well to drilling. Very often, this material is used as additional protection high-voltage cables that are laid at depth. Following some sections of the technical literature, asbestos is the most suitable material for the construction of chimneys.
In addition to construction, pipes made from this material are successfully used in rocketry and nuclear energy. Their low cost allows you to significantly reduce costs, which does not affect quality in any way.
Asbestos cement pipes are also good decorative material. Very often they are used as pillars, flower beds or fencing elements.

Main types of asbestos-cement pipes

Asbestos pipes are divided into 2 main types:

Pressure. The manufacturing method involves operating the product in conditions with high blood pressure. This type of pipe is used in water supply and sewer systems, as well as heating mains.
Pressure pipes must have ideal dimensions and an accurate internal diameter, otherwise high pressure can damage the integrity of the system. Before sale, each product is pressure tested, and defects are disposed of. Asbestos pressure pipes are equipped with special couplings that make the system more airtight.
Non-pressure. Such pipes are suitable for systems where there is little or no pressure. Free-flow asbestos pipes are suitable for ventilation systems, as well as for laying gas supply systems. The same products can also have a decorative character, for example, as a fence. Also, free-flow pipes are very often used for the construction of garbage chutes or furnaces in private homes.
Free-flow asbestos pipes are used in many industries. It is convenient to use them when improving a private home or when creating an irrigation system suburban area. During installation, you can use both polyethylene couplings and asbestos-cement couplings. Holes and cracks can be filled with molten bitumen; it will not harm the product, but will improve the quality of sealing. Installation of free-flow pipes does not create additional difficulties. This material can last up to 40 years.

Myth about the dangers of using asbestos

In many European Union countries, the use of products containing asbestos is prohibited. This material, after lengthy studies, has been recognized as a carcinogen, that is, a substance that can cause a malignant tumor over a long period of time.
But the list of the most commonly used carcinogens also includes gasoline, paint and varnish products, some types of rubber, and even salted fish With alcoholic drinks. It is not asbestos itself that is harmful to health, but the dust that arises when working with it. Regular exposure of this dust to the lungs can indeed lead to the occurrence of certain diseases.
Normal asbestos surface, e.g. water pipes, does not cause harm to health. Also, asbestos-cement pipes are often buried in the ground, which allows you not to worry about the effect of the material on the human body. For greater safety, asbestos can be painted, which will also improve appearance products.

Nowadays, most often, asbestos based on chrysotile (a material that, in all its characteristics, resembles ordinary talc) is used in construction. Chrysotile is absolutely safe for the body, does not cause diseases and is successfully used in many industries.

Asbestos-cement pipes are actively used in the construction of private and apartment buildings, as well as industrial enterprises. Such pipes have gained great popularity due to their reliability and versatility. They also have an important advantage over their analogues - low cost, which is ensured by cheap raw materials used in production. If you decide to use these pipes, then it is important to know about the many subtleties of their choice. In this article we will talk about them, analyzing the types, diameters and reliable manufacturers of asbestos-cement pipes.

Pipe material and safety

Many consumers believe that asbestos cement pipes are harmful to humans, but modern world this is a myth. Negative attitudes towards them arose due to wide application amphibilic asbestos, resistant to acids, which settled in the lungs for a long time and led to malignant neoplasms. Now such asbestos is completely prohibited, and it has been replaced by a new one - chrysotile, part of which dissolves in the lungs, and the other part is excreted. This is what will be discussed further.

Asbestos is made from hydrous magnesium silicate - natural material with the addition of various additives. When making a pipe, it is tied with cement, which gives the final product additional strength and also minimizes the formation of asbestos dust when working with it.

Requirements

Initially, these pipes were used only for the construction of reclamation structures and were manufactured in accordance with the requirements necessary for this. GOST asbestos-cement pipes number 11310-90 determined the loads that they must withstand, and GOST 539-80 determined the standard sizes.

Later they began to be used in industrial and residential construction, but GOST remained the same. In addition to it, SNiP 41-02-2003 was drawn up, which regulated the parameters of the coolant that the pipes can withstand:

Temperature up to 115 0 C.
Pressure up to 16 atm.

SNiP 2.04.02-84 was also issued, which specifies the use of asbestos pipes for laying underground water transportation systems. In this case, the length of the pipe should be 3.95 m or 5 m, and its cross-section should be up to 500 mm.

Production

Production technologies may vary, but the final products are the same in strength and safety. Manufacturing process:

Asbestos is crushed and turned into a thin film 0.2 mm thick.
A mixture of cement and asbestos is made in proportions of 1 to 4.
Next, the asbestos-cement mixture is applied to the film and rolled onto a rolling pin.
The resulting product is sent to a steaming box, where it acquires its strength.
The pipe is checked to ensure it meets the requirements.

The scope of its application will depend on the thickness and diameter of the pipe specified during production. It is worth noting that all asbestos-cement pipes are suitable for transportation drinking water, because the materials form a strong, uniform inner wall that prevents asbestos from entering the liquid.

Advantages

As mentioned above, asbestos cement pipes have a low price compared to their counterparts, but this is far from their only advantage. Full list looks like this:

They are completely impervious to corrosion because they consist of mineral products.
They are not harmed by rodents.
Wide range of sizes, which we will talk about in more detail later.
All materials that make up these pipes are non-flammable.
Pipes do not deteriorate when the liquid in them freezes.
High throughput, which is achieved thanks to polished inner walls.
Asbestos-cement pipes are produced in accordance with GOST, which guarantees quality finished product and its service life is 40-45 years.
Smooth walls also guarantee the absence of various deposits.
High resistance to aggressive environments, however, many acids can damage the integrity of the pipe.

Flaws

Asbestos-cement pipes have few disadvantages, but they are very significant:

Asbestos cement pressure pipes

All pipes are divided into two types: pressure and non-pressure. First, let's look at the scope and dimensions of pressure pipes.

These pipes are designed for transporting liquids under pressure. More often they lay heating mains, as well as hot and cold water supply systems. Such pipes undergo additional quality testing, since any irregularities in the inner wall can lead to deformation of the pipe under the influence of high pressure.

The length of the pressure pipes is 3.95 m or 5 m, but the cross-section varies more:

100 and 150 mm - pipes for laying water supply and ventilation systems;
200 mm and 250 mm - used for laying network lines;
300 mm - used for arranging drainage;
400 mm - also for water supply systems;
500 mm is the maximum internal diameter, which is used only in industrial buildings.

All asbestos-cement pressure pipes also have markings indicating working pressure products:

VT6 - 6 kgf/cm 2.
VT9 - 9 kgf/cm2.
VT12 - 12 kgf/cm 2.
VT15 - 15 kgf/cm2.

Gravity pipes

Non-pressure asbestos-cement pipes have a simpler classification, but their scope of application is much wider.

Pipe sizes:

Diameter 100, 150 mm, length 2.95 m or 3.95 m.
Diameter 200, 300 and 400 mm, length 3.95 m.

Since free-flow pipes are cheaper than their pressure counterparts, they are used not only for transporting liquids, but also for construction. For example, they can become good supports for a fence.

Non-pressure asbestos-cement pipes are suitable for irrigation systems, as they allow the transportation of liquid under low pressure. The walls of the pipe are completely sealed, so they can transport gas, as well as lay any ventilation systems.

Installation of asbestos-cement pipes

It is quite easy to work with these pipes; in addition, you do not need a special tool, because for cutting will do a hacksaw or grinder, and for joining you will need inexpensive couplings made of rubber, metal or also made of asbestos cement.

Before laying the pipe in the ditch, make sure that there are no irregularities in it, which could subsequently deform the pipe. A sand cushion will provide additional reliability; in addition, it will significantly reduce heat loss if it is a heating system.

After laying the pipes, treat the surface on which the coupling will go with a special lubricant made of graphite or glycerin - this will give additional tightness to the system.

We should also talk about the choice of couplings for asbestos-cement pipes. As mentioned above, they are made from the same material as pipes, or from rubber and plastic. The first option is not bad, but do not forget that asbestos cement is a fragile material, so you should be extremely careful when working with a coupling made from it. A rubber coupling, on the contrary, is much stronger, in addition, the connection with it is more reliable, so we recommend choosing it.

The coupling is installed quite simply:

Place it on the ends of the pipes being joined, not forgetting to lubricate them.
Using the tightening mechanism provided on the coupling, close the connection tightly.

It is also important to select the correct size coupling, because a poor-quality connection will lead to leakage of the system during operation. When choosing it, look at the diameter of the asbestos-cement pipes that you will use. This guarantees the reliability of the system.

Asbestos cement pipes are manufactured only in a straight configuration, since the production process of curved pipes is much more complicated. To make a turn in the plumbing system, use special couplings made of cast iron or steel.

To connect non-pressure pipes with a diameter of up to 150 mm, you can also use plastic fittings, which create a fairly tight connection. Using them is quite simple:

Warm up the fitting construction hairdryer.
Push it onto the end of one of the pipes to be connected until it stops inside.
Also heat up the fitting on the other side and insert the second pipe.
Once cooled, the plastic will contract significantly, creating a tight seal.

Manufacturers

There are quite a lot of manufacturers of asbestos-cement pipes in the CIS, but we will provide a list of the largest and most reliable:

JSC SKAI is the largest supplier of chrysotile cement pipes in Russia.
OJSC Belgorodasbestotsement produces pressure and non-pressure asbestos-cement pipes, which are used for all types of systems, including heating mains and gas pipelines.
JSC "LATO" is a worthy competitor of the above-mentioned companies, also engaged in the supply of all types of pipes and connecting elements for them.

You will not be able to order products directly from the factories of these companies, but if you find their pipes from an intermediary, for example in a store, you can safely purchase them, because all products that go on sale undergo strict quality control.