Assortment of polypropylene pipes for water supply. Polypropylene pipe - use cases and specifications. What diameters are produced polypropylene pipe materials

Polypropylene pipes (PP) among specialists are today considered the best pipe products. They have good technical and performance characteristics and differ in their purpose, color, quality and scope. They are used for laying, both indoor and outdoor engineering communications.

Polypropylene pipe marking

When choosing polypropylene products, attention is primarily paid to the markings applied to them. This is due to the fact that the technical characteristics of different modifications may differ markedly. For example, not every polypropylene pipe is suitable for systems operating at high temperatures and high pressures.

The current classification of polypropylene products involves their division into 4 groups. Their marking consists of two Latin letters PN and two numbers that make up a number indicating the amount of pressure for which the PP pipes are designed.

These values are applied to the surface of the product:

PN10. If the system is constructed from products of this group, then it is able to withstand a pressure not exceeding 10 atmospheres. At the same time, the maximum temperature regime The working environment cannot be over 45 degrees Celsius. With the use of pipes of this type, communications are equipped that can transport exclusively cold liquids. Since this pipe product has thin walls, it has not been widely used in the construction of internal water pipes.
PN16. The presence of such symbols means that polypropylene pipes can withstand a pressure of no more than 16 atmospheres and liquid can move through them, in which the temperature does not reach 60 degrees. These products are used for laying cold pipelines. Products of the PN16 group have a high rate of deformation under the action of high temperature, which is unacceptable when creating pressure pipelines that provide hot water or heat supply.
PN20. As evidenced by such marking, pipe products can withstand a pressure of about 20 atmospheres (read also: “What does the marking of polypropylene pipes mean - reading features”). Hot water can move through it, having a temperature of up to 95 degrees. The technical parameters of polypropylene pipes of this group allow them to be used in supply systems hot water. Currently, they are practically not used due to the occurrence of significant deformation in heating structures pressure type. When moving along such a PP pipe under a high pressure of a liquid having a maximum allowable temperature, the products begin to lead and bend.
PN25. Pipes made of polypropylene with this marking are full-fledged products for laying heating systems. They easily hold a pressure of 25 atmospheres. In their production, a composite material is used along with reinforcing inserts made of nylon fiber or aluminum foil. A layer of them reduces thermal deformation and increases the strength of pipes. PP products marked PN25 are widely used in pressure pipelines. Heat loss in them is 2 times less compared to other types of pipes.

Advantages and disadvantages of polypropylene products

It is the properties of polypropylene pipes that make them in demand among developers, as multi-storey buildings, and small suburban households.

Among the positive features of products made of polypropylene, it should be noted:

Long service life, which is approximately 50 years. When the pipes are used in cold water supply systems, according to manufacturers, they can be used for up to 100 years.
Solid deposits are not collected on the inner surface of the product, since a special processing technology is used during the production stage.
Absence of condensate and frost resistance due to low thermal conductivity.
The low weight of a polypropylene pipe, which is 9 times less than that of metal products.
Easy installation and transportation.
Anti-corrosion resistance.
No additional maintenance required.
Resistance to aggressive chemical environments.
Elasticity.
Inexpensive cost. You can buy pipes of different price categories.

In addition to the advantages of polypropylene pipes, they have disadvantages:

High degree of linear expansion. If the PP products are not reinforced, special expansion joints must be used during installation.
Insufficient heat resistance. Regardless of the choice of type of pipes, it is necessary to insulate them, especially for the arrangement of heat supply systems.
To change the direction of the pipe laying, the use of special fittings will be required.
Poor resistance to direct sunlight. Its negative impact can cause aging of the material and thereby reduce the service life of polypropylene products.

Since the degree of linear expansion is quite high, when installing the pipeline, sagging of the PP pipes should not be allowed - for this, the attachment points on the wall should be located at small intervals.

The selection process of polypropylene pipes

In order to select these products without error, four important moments in addition to product labeling, which was described above:

Maximum allowable temperature. It has already been said that for heating systems, products with the symbols PN25 will be the best choice, for hot water - PN20 and for supply structures cold water– PN16.
Diameter. The section is selected taking into account the technical parameters that the pipeline should have. The best choice for wiring in apartments are pipes, in which this parameter is 20 or 25 millimeters, for arranging drains - 32 or 40 millimeters. PP pipe of large diameter with thick walls is used for laying main pipelines, which are located in the basement of multi-apartment buildings.
The value of the maximum allowable pressure. If it's about domestic use, then all pipes will fit, including products of the PN10 brand. The duration of their service is directly related to the pressure in the line and the temperature regime of the working environment. For example, if the liquid temperature stays at 95 degrees for a long time, at a constant pressure, the products will last no more than 5 years, and if the water temperature is about 20 degrees and the pressure is 10 atmospheres, almost 50 years.
Thermal expansion coefficient. Products made of polypropylene are distinguished by the ability to change their geometry under the condition of transporting high temperature water. These changes relate to the thickness of the pipe walls, and this is very critical for the throughput of pipelines.

Products marked PN20 are not recommended by specialists to be laid using a closed method, since cracks will appear in the plaster layer as a result of their deformation. As for the use of PN25 products, it can be mounted in both ways - open and closed.

The open version will not worsen the interior of the room, since the reinforced PP pipe holds its shape well and does not need to be bent. Thus, the method of laying a hot water supply system depends on the coefficient of linear expansion of polypropylene pipe products.

On the world market, PP pipes are presented in the following assortment.

PPH - type 1. These polypropylene products are considered the simplest of the entire range of products manufactured by modern industry. Their scope is the laying of cold water supply structures, ventilation systems, pipelines for industrial purposes.

PPB - type 2. This type of polypropylene pipe is made from a complex block copolymer. Such products are used in the arrangement of pressure systems for supplying cold liquids and heat supply. Also, these products are used in the production of shock connecting elements with high strength.

PPR - type 3. The technical characteristics of the PPR pipe are based on the fact that a random copolymer is used for its production. Its implementation in industrial production was of global importance. Initially, it had the abbreviation PPRC - polypropylene random copolymer, later it was shortened to PPR. Of the products belonging to this variety, cold and hot water supply systems are laid. It is these products that are used to create a warm water floor.

Such a molecular structure provided the following characteristics of the PPR pipe:

the highest strength and heat resistance compared to other types of polypropylene;
chemical resistance to various acids and alkalis;
unlike PPH and PPB products, this material is able to withstand the temperature regime of the working environment for a short time up to 140 degrees and in a constant mode up to almost 90 degrees;
frost resistance - products completely restore their shape after exposure to negative temperatures.

The technical characteristics of polypropylene PPRC pipes made them an alternative to galvanized metal products. Among them are products that are reinforced with aluminum or fiberglass.

PPs - type 4. The raw material for the production of these products is a highly flammable high-strength polymer. The maximum allowable temperature of the working environment of these PP pipes is 95 degrees. Experts consider them the best option for non-reinforced single-layer products for heating systems.

Polypropylene pipe color

Polypropylene tubular products are produced in four colors.

Description of polypropylene pipes of different colors will help you make the best choice:

White PP products. They are used in the construction of plumbing systems. They are easily mounted by welding, so the work can be completed in the shortest possible time. White polypropylene pipes are not recommended for outdoor use and at low temperatures. Products should be transported with extreme care, as any physical or mechanical impact on them can cause damage. PP pipe has many advantages: long service life, ability to withstand pressure of 25 bar, corrosion resistance, affordable cost.
gray pipes. These polypropylene products are often used when laying water pipes and individual and centralized heating systems. Their main technical characteristics are: thermal and chemical resistance, long service life, environmental friendliness, tightness, etc. They are securely connected with a soldering iron.
Black PP pipes. Experts recommend using them in the arrangement of sewer communications and drainage structures. In the production of these products, special additives are used that improve them. technical specifications. Black pipes have a number of advantages: resistance to UV radiation, various aggressive media and drying out; high strength.
Green polypropylene products. Pipes of this color are chosen for the installation of irrigation systems and watering the backyard. They are inexpensive and therefore the owners of cottages and gardens prefer not to pay attention to their low strength characteristics. Green PP pipes do not respond well to physical stress, including system pressure. After installation during operation, it is necessary to regularly monitor the condition of communications, since the risk of pipe breakage is quite large.

Corrugated polypropylene pipes

This type of pipe product is used to create engineering communications for water disposal and sewerage, as well as structures for the disposal of atmospheric precipitation and groundwater. The maximum allowable temperature of the liquid that moves through corrugated PP pipes is + 60 degrees for permanent drains, and no more than 100 degrees for short-term drains.

Pipelines that are built using corrugated products are installed in open trenches and using the trenchless laying method. Transitions are equipped using reinforced concrete wells. None additional equipment and special equipment is not required for laying large diameter corrugated pipes.

Now industrial enterprises the production of two-layer corrugated pipe products made of polypropylene was mastered.

Their positive qualities are:

long service life;
good throughput;
resistance to corrosion and aggressive chemical compounds;
increased ring stiffness;
the presence of dielectric properties that provide resistance to the effects of stray currents;
resistance to hydroabrasive wear.

Among the shortcomings is susceptibility to accelerated aging.

Welding technology for polypropylene pipelines

During the installation of a system of pipes made of polypropylene, the thermal polyfusion method is used - the parts to be welded are heated and quickly connected with a soldering iron.

Some manufacturers equip welding tools with two heating elements instead of one. In this case, the power becomes sufficient to heat pipe sections of different diameters without any problems.

But this advantage can be a disadvantage at the same time. Performing heating with two elements at once can overheat the plastic and overload the power supply networks. For this reason, the second heater should only be used as a backup when the first fails.

The duration of the heating phase depends on a number of factors:

diameter of pipe products;
temperature environment, which should not deviate from the norm;
welding belt size.

After heating, polypropylene retains its plasticity for short period time. In a matter of seconds, you need to fix the connection, avoiding the appearance of distortions. The optimum temperature for heating is + 260 degrees.

To ensure a reliable and durable connection, polypropylene must be heated strongly, but excessive heating can lead to loss of shape of the product. Therefore, the time during which welding is performed should be kept under control.

Depending on the cross section of the PP pipes, it should be:

with a diameter of 20 millimeters - 8-9 seconds;
when welding products with a diameter of 25 millimeters - 9-10 seconds;
when connecting parts with a diameter of 32 mm - 10-12 seconds.

It is not enough to heat and connect polypropylene pipes, they still need to be properly cooled. The time hold period should be the same length as the heating phase. If the execution of this process as a result of the haste is completed earlier, the connection will undergo deformation.

The technology for welding PP pipes is a difficult job. Great importance has not only a violation of the heating time, but also non-compliance with the rules for soldering.

The main nuances of the process are as follows:

During work welding machine must be kept on at all times.
Markings should be applied to the surface of the pipes, which will ensure the required depth of the welds.
The parts to be joined must be heated at the same time.

Most developers, having familiarized themselves with the advantages of polypropylene pipe products, opt for these products. The finances spent on the purchase of PP pipes will certainly pay off over time.

Polypropylene pipe: ppr polypropylene, specifications, ppr weight, parameter, properties, description

Dimensions and classification of polypropylene pipes

Polypropylene pipes are manufactured in accordance with GOST and their dimensions are regulated by the standard. The diameter of the inner lines is from 10 to 1200 mm, the wall thickness depends on design features. They are classified: according to the composition of raw materials, according to pressure, purpose.

Manufacturers produce polypropylene pipes of different diameters

Polypropylene pipes conquer new spaces every year - they are used in many industries: mechanical engineering, Agriculture and, above all, in heating, plumbing and sewerage systems. The dimensions and configuration of PP pipes are regulated by GOST. Products are divided into types depending on the qualitative composition of the raw materials, namely on the degree of modification of the base polymer with various additives.

Classification of polypropylene pipes according to the composition of raw materials

PPR (PPRS, PPR) - products of this type are made from a static copolymer of foam propylene (or a random copolymer) with a crystalline structure of molecules. Resistant to temperature fluctuations from -170 to +1400C, shock loads, therefore, they are widely used for sewerage, plumbing and heating. They are considered the most popular material for domestic construction. The sizes are in the range of 16.110 mm and are sub-classified according to the pressure for which they are designed.
PPH products. They are made from raw materials with the addition of modifying additives: antistatic agents, flame retardants, nucleators, which give increased impact strength to the polymer. Products of this type are used for outdoor cold water supply, ventilation and sanitation. They are not suitable for heating systems, as they have low temperature melting. The diameters of PPH polypropylene pipes are usually large, since they are most often used in the construction of industrial sewage and drainage systems.
PPB (block copolymer). The structure of this type of raw material consists of homopolymer micromolecules (blocks), which differ in structure, composition, and alternate with each other in a certain order. The end product of this type, due to its molecular structure, acquires an increased impact resistance and is used for underfloor heating systems, cold water supply.
PPs (polyphenyl sulfide) is a top class polymer with a special molecular structure. Possesses the increased resistance to loadings and heating, the improved indicators of wear resistance, durability. The diameter of polypropylene pipes of this type is from 20 to 1200 mm. Scope of application - ventilation, hot, cold water supply, heating.

Pressure classification

In the marking of PP products, the designation N25, N10, etc. is found. This indicator makes it possible to assess the resistance of the material to the pressure of the fluid passing through the line.

There are the following types of polypropylene pipes:

N10 (PN10) - with a working pressure on the wall of 1.0 MPa and a polymer thickness of 1.9 to 10 mm. They are used for arranging underfloor heating, cold water supply with heating up to +45 degrees. The diameter of polypropylene pipes of this type is: outer - 20 ... 110 mm, inner - 16 ... 90 mm.
PN16 is a rarely used type of product with a wall pressure of 1.6 MPa. Suitable for supplying cold and hot water with liquid heating up to +60 degrees.
N20 (PN20) - lines made of polypropylene with a working pressure on the wall of 2.0 MPa and a product thickness of 16 ... 18.4 mm. The most popular material for hot and cold water supply with a liquid heating temperature of up to 80 degrees. Execution: outer diameter - 16 ... 110 mm, inner - 10.6 ... 73.2 mm.
N25 (PN25) - polypropylene pipe with a working pressure on the wall of 2.5 MPa and reinforcement with aluminum foil. Ideal for heating systems, hot water supply with a coolant temperature up to +95 degrees. Due to the multilayer structure, products of this type have increased resistance to shock and thermal loads. Execution: inner diameter of PN25 polypropylene pipes - 13.2 ... 50 mm, outer - 21.2 ... 77.9 mm.

Currently, there is a variant of reinforcing a polypropylene line with fiberglass. This avoids delamination of conduits during operation, and during installation - loss of time for cleaning cuts during welding. Systems with fiberglass mesh reinforcement are most preferred, as they provide quick installation, resistance to deformation, extended service life without repairs.

What determines the size of polypropylene pipes

What are the diameters of polypropylene pipes? The parameters depend on the temperature and volume of the transported liquid, its pressure on the walls. First of all, the configuration of the product is selected depending on the purpose. For each type of classification, there is a table of sizes for polypropylene pipes, according to which a suitable product is selected.

What are the sizes of highways? The physical parameters of sewerage, heating, water supply systems directly depend on what they are intended for. The diameters of metal and polypropylene pipes differ slightly, but in favor of the latter. The parameters of plastic ones are smaller, and the service life is much longer. In addition, the polymer wins in terms of aesthetic properties and corrosion resistance.

The diameter of the pipe pp is selected according to the results of calculations of the patency of the line. When choosing steel, copper, polymer products, you should carefully consider the marking - some types are indicated by the inner diameter, and some by the outer. In the marking of polymer pipes, only the outer diameters are indicated.

How to choose the right line size

We select the inner diameter of polypropylene pipes by elementary calculation with the initial data:

the speed of fluid movement along the line;
water consumption.

The diameter of polypropylene pipes for the water supply of a private house or mansion is calculated by the formula:

where v is the speed of the passing stream, m/s (taken from 0.7…2 m/s);

π is the number Pi, equal to 3.14.

The diameter of the pipes for the water supply of a private house in practice is 20 mm by default. For high-rise building at each stage of construction, different diameters of polypropylene pipes are used based on a refined calculation: for supplying water to each apartment, to each entrance, to a house, quarter, microdistrict, various parameters of the mains are used. Accordingly, the higher the water consumption, the larger sizes are accepted.

In practice in apartment buildings apply following sizes polypropylene pipes in mm:

for risers of 5-storey buildings Ø25 mm;
indoor wiring - the diameter is taken 20 mm;
for risers of houses of 9 or more floors, polypropylene pipes with a diameter of 32 mm are accepted.

Polypropylene pipes - dimensions, table

Polypropylene pipes of large diameters are used in organizing the supply of water, heating, sewerage to houses, residential areas, public buildings, sports complexes, hotels, for industrial needs. For example, pipes for water supply with a diameter of 500 mm or more are used to supply cold drinking water from storage pools to metropolitan areas. To transfer the coolant, pp pipes of large size are not used because of the high thermal load, which contributes to the softening of the polymer lines.

For ventilation systems and gutters of industrial buildings, polypropylene pipes are used, the dimensions of which exceed Ø400 mm.

For self-installation of heating, plumbing and sewerage systems in a private house or apartment, it is important not only to choose correct dimensions highways, but also connect them correctly. This will require special welding equipment, some skill and ability to use it. Therefore, it is better if professionals will deal with the design of communications and their laying.

In the article, we briefly described the classification and main parameters of polypropylene water mains used for external and internal systems heating, sewerage, ventilation, water supply. Product range different diameter and purpose allows you to implement complex construction projects, perform piping of hot water, cold water and heating aesthetically, quickly, and reliably.

Diameters of polypropylene pipes: dimensions in mm, table, inner diameter of PP pipes

Polypropylene pipes are manufactured in accordance with GOST and their dimensions are regulated by the standard. The diameter of the internal highways is from 10 to 1200 mm, the wall thickness depends on the design features. They are classified: according to the composition of raw materials, according to pressure, purpose.

Polypropylene pipes for water supply and heating

This article will present polypropylene pipes for water supply with a description of their main properties, types and scope. Along with metal-plastic pipes, even an untrained person can lay an internal water supply or heating system from polypropylene pipes. It is enough to get the necessary minimum knowledge so that the quality and appearance of pipelines in your house, bath or other individual buildings would meet the highest requirements.

Properties of polypropylene pipes for water supply

Recently, the installation of polypropylene water pipes has become widespread in the construction individual houses. This is explained by the availability and low price of all components, ease and reliability of installation, long service life (over 50 years), absence of corrosion and build-up, attractive appearance, the possibility of using in heating systems, hot, cold and drinking water supply.

Depending on the modification of polypropylene, three types of pipes are produced:

From a homopolymer - PP-H (according to the European classification), corresponds to PP-G and PP type 1 according to the Russian classification;
From block copolymer - PP-8 (PP-B and PP type 2);
From random copolymer - PP-R (PP-R and PP type 3).

According to GOST R 52134 -2003, regulating the use of thermoplastic pipes, all three of the above types of polypropylene can be used in the production of pipes for water supply and heating. The standards of countries such as Germany, Great Britain and the USA also allow their use for pipelines, taking into account all sanitary and hygienic requirements.

In accordance with the purpose of the water supply, the following classes of polypropylene pipes are produced:

Operating temperature max, ˚C

According to their structure, polypropylene pipes are produced both from solid material and reinforced with aluminum or fiberglass. Pipes made of solid polypropylene are used only in hot and cold water supply systems, and water supply from water sources, while reinforced pipes can be used in all systems, including radiator heating.

Compared to solid pipes, reinforced pipes have a significantly lower thermal elongation. So, for pipes reinforced with fiberglass, it is two times less, and for aluminum - four times less. The perforated aluminum layer reliably protects against harmful diffuse penetration of oxygen through the pipe walls into the coolant or water. These factors are especially important for indoor heating with long pipelines, when the amount of oxygen in the water can reach such a value that it will harm the plumbing equipment.

As a rule, the marking of the pipe should contain the value of the internal stress in MPa (1 MPa≈10 kg/cm²). For example, PP-R 63, where the number "63" means an internal stress of 6.3 MPa in the pipe at 20 ˚C, at which the manufacturer guarantees that it will not collapse for at least 50 years. This property of a polypropylene pipe is called the minimum long-term strength and is designated as MRS (Minimum Required Strength). The higher this figure, the stronger the pipe. Therefore, it must be taken into account that an improperly selected pipe may not withstand the guaranteed service life.

Selection and application of polypropylene pipes for water supply

The scope of application of polypropylene pipes in individual houses, baths and outbuildings extensive - from hot and cold water supply to the arrangement of radiator and floor heating systems. With their help, you can connect to pipelines from various materials: steel, copper and metal-plastic. Long service life allows them to be laid with confidence in both open and closed systems.

How to choose the right polypropylene pipes

However, it is important to make the right choice among the vast range of pipes offered by many manufacturers. Here are a few criteria to consider when buying them:

Pipes must comply with the parameters of the plumbing or heating systems;
For high-quality assembly of pipelines, all their components must be from the same manufacturer. Only then can we talk about the reliability and durability of the installed water distribution system;
When buying, be sure to evaluate the quality of pipes and fittings:

smoothness of the inner and outer surface;
the presence of cracks, chips, bubbles, heterogeneity of the structure, foreign inclusions;
the correctness of the geometric shape of the outer and inner diameter of the pipe;
lack of different wall thicknesses.

Considering that polypropylene pipes can withstand temperatures of no more than minus 20 ˚C, you should ask the seller about the conditions for their storage in winter time of the year. Improper storage can lead to irreversible processes in the pipe material and, as a result, to marriage in the work done.
If it is planned to supply drinking water, then it will be useful to familiarize yourself with the quality certificate for the compliance of the pipe with sanitary and hygienic standards.
To avoid additional difficulties during installation work, choose only straight pipes. Stores often store them upright, which results in a bend, sometimes quite a bit.
Buy pipes only from well-known manufacturers, which have proven themselves from the best side and provide certificates of compliance with the declared quality. For example, domestic "Sinikon", "FD Plast", "Valtec" and "Ikaplast" or foreign "Ostendorf", "Valsir", "Firat".

Assortment of polypropylene pipes, mm

Note: PN25 pipe is manufactured with a reinforcing aluminum layer, which can be a plain or perforated layer with through holes. The perforated layer ensures a secure connection of all layers without the use of glue. The aluminum layer can be either offset to the outer surface of the pipe, or symmetrical with respect to the inner and outer surfaces. This only affects the pipeline assembly process, which will be discussed in the corresponding article.

What VALTEC offers:

Which is better - polypropylene or metal-plastic pipes

And in conclusion, a few words in favor of the choice exactly polypropylene pipes for all pipeline systems.

There was a time when I used both copper, and steel, and metal-plastic pipes. Until I found out about polypropylene, and did not use them in my bathhouse and house, and heating, and cold and hot water. Not a single marriage in the compounds! The work is clean, fast, reliable, “without noise and dust”, in a word, pleasant in every respect. The cost of fittings and the pipes themselves, compared to other types, is ridiculous. No pipe benders, no gas welding, no propane, no other expensive tools and materials are needed.

All you need is a special welding machine and a cutter. Although you will have to sacrifice your money to buy them, this is not comparable to the costs that will be incurred when installing pipelines from other materials, especially copper. And the purchased tool is always useful when repairing or modernizing pipelines, not only in the bath, but also in your home. However, it is up to you to decide what is better to choose - polypropylene pipes for water supply or some others.

Polypropylene pipes for water supply and heating, Let's take a steam bath

This article will present polypropylene pipes for water supply with a description of their main properties, types and scope.

Polypropylene pipes. Types and specifications

Not everyone knows that at present there are many types of polypropylene pipes that differ in technical characteristics, quality, purpose and color. But these products are increasingly used for arranging in-house water networks, and, practically, replaced steel counterparts. Based on them, you can create engineering communications with elevated temperature working environment - hot water and heating systems.

Today, many types of polypropylene pipes are produced for use in various fields.

Marking of polypropylene pipes

The first thing you need to pay attention to when choosing these products is what kind of marking they have. The fact is that the technical characteristics of polypropylene pipes differ from modification to modification. And this factor imposes significant restrictions on the scope of their application. In particular, not all of them are capable of operating at significant pressure and high temperature.

The current standardized classification of polypropylene pipes divides such products into 4 groups. Their designation contains the Latin letters PN and two digits. This number displays what pressure polypropylene pipes are designed for.

PN 10. Systems assembled on the basis of products of this group http://trubamaster.ru/vodoprovodnye/prokladka-polipropilenovyx-trub.html can withstand pressure up to 10 atmospheres. The answer to the question regarding the maximum temperature of the working environment is unequivocal: + 45˚С. These numbers are indicated on the surface of the pipes. With the help of pipe products of this type, communications are created for transporting only cold liquids. The main difference is thin walls. "Thanks" to such technical characteristics, pipes made of polypropylene of the PN10 group have not found wide application for laying pipelines in apartments.

PN16 . Polypropylene pipes, marked with such a sequence of symbols, can withstand pressure up to 16 atmospheres, they can transport liquid with a temperature of +60˚С. These polypropylene pipes can be selected exclusively for "cold" lines. In addition, they have a fairly high coefficient of thermal deformation, which is unacceptable in pressure pipelines for heating and hot water supply.

You can determine the type and purpose of the pipe by marking on its surface

PN 20. We already know what pressure a polypropylene pipe will withstand, in the designation of which there is such a combination of symbols - 20 atmospheres. And the water temperature of +95˚С is not terrible for them. The technical characteristics of PN20 polypropylene pipes allow their use in hot water supply.

Important! Due to significant temperature deformation, they are not currently used in pressurized heating systems. When a liquid is transported through such a pipe under high pressure with a temperature approaching the maximum allowable, it leads and bends.

PN25. These are already full-fledged pipes for heating made of polypropylene. The coolant temperature can reach +95˚С. The answer to the question of what pressure a PN25 polypropylene pipe holds is clear - 25 atmospheres. As a raw material for their manufacture, a composite material with reinforcing inserts is used. These can be nylon fiber or aluminum foil. Both types of interlayer not only improve the strength characteristics of polypropylene pipes, but also reduce thermal deformation. Even when transporting water with a maximum allowable temperature under high pressure, their linear dimensions will not change. Therefore, reinforced products were found wide application in pressure pipelines. Another important factor: compared to a thick-walled polypropylene pipe installed in similar lines, heat loss in metal-plastic products is two times lower. But in terms of frost resistance, these types of pipes are comparable.

Pros and cons of polypropylene pipes

The technical characteristics of a polypropylene pipe, which made it one of the most popular types of building materials, are due to the amazing properties of this polymer.

One of the advantages of polypropylene pipes is installation: with a fairly simple technology, a strong and durable connection is obtained.

What are the features of polypropylene pipes experts highlight? There are several of them:

service life of about 50 years. And when used only in cold water supply, according to manufacturers - all 100;
impede the formation solid deposits. This characteristic of polypropylene pipes is due to the use of a special technology for processing the inner surface at the production stage;
soundproofing. This property is inherent even in a polypropylene pressure pipe, in which the movement of liquid under high pressure can cause vibrating and rumbling noises that are unpleasant for the human ear;
no condensation. This is due to the low thermal conductivity of polypropylene pipes;
light weight. The value of this characteristic of a polypropylene pipe is 9 times less than the value of a similar parameter of a metal product;
ease of installation. But if you are engaged in this business for the first time, you should heed the advice of professionals. In particular, pay special attention to the heating time of polypropylene pipes when they are connected by welding;
do not need additional maintenance;
resistant to chemically aggressive acid-base compounds;
high elasticity;
affordable cost. You can choose such products in any price range.

Not the last role in the high demand, taking into account the peculiarities of the climate of our country, is played by the frost resistance of polypropylene pipes, due to their low thermal conductivity.

Polypropylene pipes are resistant to low temperatures, and no special conditions are required for their storage and operation.

Above were the advantages of polypropylene pipes. But, as always, it's not without its downsides. The main ones are:

Sufficiently high linear expansion. Unreinforced pipes made of polypropylene require the use of special compensators during installation.
Low temperature resistance. Regardless of which polypropylene pipes are selected, you must immediately find a heater. This is especially true for heating systems.
Poor deformation ability. It is impossible to change the direction of the pipe without using additional fittings.
Poor resistance to direct sunlight. Although this phenomenon does not cause the achievement of the maximum temperature for polypropylene pipes, it is accompanied by premature accelerated aging of the material.

Advice! Due to the expansion factor, when installing the pipeline, follow the special installation rules. In particular, do not allow the pipes to sag - to do this, place the pipe attachment points on the wall with small gaps.

How to choose polypropylene pipes

For correct selection These products need to take into account five points. The labeling of polypropylene pipes has already been discussed, so 4 important factors remain.

Maximum temperature. The choice should be made based on the expected value of this coolant parameter, taking into account the marking of polypropylene pipes. As mentioned above, PN25 - the best choice for heating systems, PN20 - for hot water supply, PN16 - for cold water supply systems.

Ordinary domestic plumbing can be mounted from pipes of small diameter

Diameter. It must be selected taking into account the technical characteristics of the pipeline system being created. The best polypropylene pipes for apartment wiring are products with a diameter of 20 and 25 millimeters. For risers, it is better to use products with a cross section of 32 or 40 millimeters. A thick-walled polypropylene pipe of large diameter is used for the main pipeline installed in the basement of an apartment building.

Maximum allowable pressure. If we talk about domestic use, then almost all types of pipes are suitable, including the PN10 brand product. How their service life is related to pressure and temperature, let's look at the example of this pipe.

water temperature 20˚С. The service life will be at least 50 years, if the pressure in the central line does not exceed the mark of
water temperature 50˚С. In this case, in order for the service life to be 50 years, it is necessary to withstand a pressure not exceeding;
water temperature 70˚С. The service life will be equal to that declared by the manufacturer at pressure;
the water temperature is kept at 95˚ C for a long time. In this case, a service life of 50 years is out of the question. The maximum is some 5 years at constant pressure.

Thermal expansion coefficient. We already know that polypropylene pipes are products whose geometry changes at a high temperature of the transported liquid. The changes concern the thickness of their walls. And this is critical for such a parameter as the throughput of the pipeline.

Pipe type PN20 is not recommended to be laid closed. After all, its deformation can cause cracks in the plaster layer. But the use of polypropylene pipes of the PN25 type allows laying both in a closed and open way. In the latter case, the interior of the living space will not deteriorate due to the lack of bending of these products. After all, the pipe reinforced from polypropylene perfectly keeps its shape.

Important! The characteristic of polypropylene pipes "Coefficient of linear expansion" largely determines which method of laying a hot pipeline should be chosen.

As for the service life of polypropylene pipes, when correct use each of them will last at least five decades.

Plumbing laid inside the walls will not spoil the look and style of the bathroom, but for this method of installation, you need to choose durable pipes.

Assortment of polypropylene pipes

This segment of the world market is represented by the following types of polypropylene pipes:

PPH. These are the simplest polypropylene products and all those that modern industry produces. They are intended to create cold water supply systems, industrial pipelines, as well as ventilation systems;
ppb. This type of tubular stock is produced from a complex polypropylene block copolymer. These products have found application in pressure systems for supplying cold water and heating. But they are used not only as pressure pipes made of polypropylene. High-strength shock connecting elements are made from them;
PPR. For production, a random copolymer of polypropylene will be used. On the basis of this type of pipes, systems are created for both hot and cold water supply, including water-heated floors;
PPs. This separate view range of pipe products. As a raw material for its manufacture, a highly flammable high-strength polymer is used. The maximum operating temperature of PPs type polypropylene pipes is +95˚С. According to experts, this is the best version of a single-layer (non-reinforced) product for heating systems.

Color of polypropylene pipes

The assortment of polypropylene pipe products is represented by products of four colors. They are white, grey, black and green. On the basis of white or gray polypropylene pipes, various engineering communications are mounted, ranging from plumbing to an individual heating system.

Each type of pipe has its own color or marking strip on the outer surface

However, the disadvantage of white pipes is the impossibility of outdoor operation, since such products are characterized by low frost resistance. Already at a temperature of 0˚С, the type of polypropylene used for their manufacture begins to crystallize.

Helpful information! White pipes withstand pressure of 25 bar! At the same time, gray polypropylene pipes are characterized by better thermal load tolerance.

Gray pipes also have the following advantages:

possibility of operation in pressure systems;
thermal and chemical stability;
long service life;
environmental friendliness;
tightness.

In addition, gray polypropylene pipes are perfectly connected with an ordinary soldering iron.

From the existing range of these products for creating sewers, as well as drainage systems It is recommended to use black pipes made of polypropylene. Additives introduced into raw materials at the production stage increase their technical capabilities. Of the advantages of plastic black pipes, it is worth highlighting:

resistance to various aggressive environments;
unaffected by UV radiation;
high strength;
the manufacturer's declared service life is fully maintained.

At present, many owners suburban areas I am interested in the question of which polypropylene pipes are the best for irrigation. The answer is clear: Green colour. They are sold at such a low price that gardeners simply may not pay attention to the strength characteristics of these products.

Corrugated pipes made of polypropylene

Such products of large diameter are used for the construction of drainage systems, sewerage, rainfall (stormwater) and groundwater (drainage).

Corrugated pipes made of polypropylene are used in a variety of areas - a small diameter is in demand for laying electrical networks

Suggested for polypropylene corrugated pipe maximum value the temperature of permanent drains is about +60˚С, and short-term ones up to +100˚С, which is rare. Pipelines created on the basis of this product are laid by trenchless laying and into open trenches, and the organization of transitions is carried out using reinforced concrete wells. Moreover, no other structures, as well as special equipment for laying and installing large-diameter corrugated pipes, are required.

Modern enterprises have now mastered the production of two-layer corrugated pipes made of polypropylene. Of their advantages, it is worth highlighting:

high ring stiffness;
chemical and corrosion resistance;
resist stray currents. Dielectric properties favorably distinguish these products from metal counterparts. After all, those, being laid close to cable routes, are subject to accelerated aging due to the effects of electrochemical corrosion;
high throughput;
increased resistance to hydroabrasive wear;
long service life.

Features of welding polypropylene pipes

For welding products of this type, the method of thermal polyfusion is used. It consists in heating the parts to be welded, followed by their fast connection. This procedure is performed using a special soldering iron. Some manufacturers of such tools equip them with two heating elements, the power of which is enough to heat pipes of a specific diameter. It would seem that this is a plus. But not in this case.

For high-quality connection of pipes using the thermal diffusion method, special equipment and strict adherence to welding technology will be required

Important! Heating at the same time by two elements can overheat the plastic and cause an overload of the power supply network. Therefore, the second heater should be used as a spare when the first fails.

The heating time depends on:

pipe diameter;
welding belt width;
ambient temperature. It should not go beyond the norm.

The material after heating retains plasticity for a very short time. In a few seconds, you need to have time to fix the connection, while getting rid of distortions. The optimum temperature for heating is +260˚С. To ensure a reliable connection, the pipe material must be heated sufficiently strongly. But excessive heat can cause loss of shape. Therefore, the execution time of this operation should be controlled. Depending on the section of the pipes, it is:

8 ... 9 seconds for pipes with a cross section of 20 millimeters;
9 ... 10 seconds if pipes with a diameter of 25 millimeters are welded;
10 ... 12 seconds when welding pipes with a diameter of 32 mm, etc.

Heated and already connected pipes must be properly cooled. Fixing takes the same amount of time as the heating phase. If you rush and stop this procedure ahead of time, the connection will be deformed. Welding polypropylene pipes is a relatively difficult process. Critical is not only non-compliance with the heating time, but also non-compliance with the soldering rules. The main ones are the following:

during operation, the welding machine must always be on;
mandatory marking on the surface of the pipe in order to ensure the proper depth of the weld.
the elements to be joined must be heated at the same time.

Having learned what polypropylene pipes are, most of our compatriots prefer to buy just such products. The money invested will pay off handsomely due to many factors. In particular, the low thermal conductivity of the material makes it possible to refuse the purchase and installation of thermal insulation. At the same time, heat savings during transportation of the coolant is about 20%. That is, the gas consumption in the autonomous heating system can also be reduced.

Polypropylene pipes specifications

Polypropylene pipes technical specifications. Marking of polypropylene pipes. Advantages and disadvantages. How to choose polypropylene pipes. Assortment of polypropylene pipes.

Evgeny Sedov

When hands grow from the right place, life is more fun :)

Content

A modern, affordable and reliable solution for centralized and decentralized systems - polypropylene pipes for heating (PPR, PPR), conventional or reinforced with fiberglass, aluminum. Such products are characterized by resistance to aggressive substances and chemical solvents, durability, they are not subject to corrosive processes, which is why polypropylene pipes are so popular for heating.

What are polypropylene pipes

Metal is being replaced by more modern material- polypropylene for heating, which is a type of thermoplastic polymer. Just ten years ago, products were made from pure material and did not have the most best performance pressure resistance and high temperatures. Today, the range of polypropylene pipes for heating has expanded significantly, each type has its own technical characteristics.

Species

The characteristics of polypropylene pipes are determined by their type. Initially, PPR products were widely used - the simplest systems. Their declared service life is much lower than the declared one, deformations occurred due to the temperature and pressure of the water. Manufacturers modified the material and the following classification appeared on the consumer market:

PPH (type 1) - a homopolymer designed for industrial piping, cold water supply and ventilation systems;
PPB (type 2) - a random copolymer with polyethylene in the structure, which can be used in cold water systems and underfloor heating systems;
PPR (type 3) - polypropylene with ethylene, which is characterized by high heat resistance;
PP-RCT (type 4) is a polymer similar to type 3, but has a denser structure, reinforced with aluminum or fiberglass.

Marking

Before buying, carefully study the markings on the first of them. The type must be indicated on the products: PPH, PPB, PPR, PP-RCT. 1, 2 type are not suitable for heating. domestic producers mark products according to GOST standards with a class of operation. Only class 5 is suitable for the heating system, and classes 3 and 4 are also used for underfloor heating. The working pressure is also indicated on the side of the product. The designation PN25 indicates that the pipe can withstand 25 atmospheres per day.

Manufacturers

The construction market presents polypropylene pipes for heating from all over the world. A huge number of manufacturers and their products can mislead an inexperienced buyer. The choice should not be based on whether the product is cheap or expensive, whether there are promotions, discounts and sales on the material. The purchase should be made based on the technical characteristics of the products and the reliability of the seller. Czech and German companies deserve special consumer confidence.

Wavin

Builders and repairers have most likely heard about the high quality of Czech products from Vavin Ecoplastic. These products occupy a leading position in the ratings of online plumbing stores. Experienced craftsmen they know where to order the products of this company from catalogs with delivery by mail, so as not to overpay. One of the popular options is the following:

model name: Ekoplastik PN20 25x4.2;
price: 62 rubles per meter;
characteristics: 25 millimeters in diameter, service life - 50 years, wall thickness - 4.2 mm, operating temperature - up to 700 ° C;
pluses: the presence of an oxygen protective layer;
cons: can only withstand pressure up to 10 bar.

To solve different problems and operating conditions, Vavin produces several variants of its products. With significant loads on the system, experts recommend using the following form:

model name: Ekoplastik PN20 40x6.7;
price: 165 rubles/m;
characteristics: operating temperature - up to 700 ° C, permissible pressure - up to 20 bar, wall thickness - 6.7 mm;
pluses: withstands high pressure, suitable for central and local heating;
cons: high cost.

RVC

Polymer heating systems are a narrow specialization of the Plastic company, which manufactures products under the RVC trademark. Production is located in Russia, which ensures an affordable cost of production. RVC are manufactured in accordance with European standards. Raw materials and equipment are imported from Europe.

model name: PP-pipe int. aluminum reinforcement PN25 20X3.4 L2M RVC;
price: 58 rubles/m;
characteristics: wall thickness - 3.4 mm, diameter - 25 mm, internal aluminum reinforcement, marking - PPRC, operating temperature - up to 900°C;
pluses: high permissible operating temperature, withstands high pressure;
cons: during installation requires soldering.

Heating using RVC products is low heat loss due to low thermal conductivity, long service life, minimal pressure loss. The quality of Russian products is ensured not only by raw materials and technologies that meet the standards, but also by specialists who constantly improve their level, adopting the experience of colleagues from Europe. Fiberglass reinforced products are reliable and inexpensive:

model name: fiberglass reinforced PN25 20X3.4 L2M RVK;
price: 49 rubles / m;
characteristics: operating temperature - up to 900°C, wall thickness - 3.4 mm;
pros: affordable price, ability to withstand high temperatures and pressure;
cons: requires soldering during installation.

Prices for polypropylene pipes and fittings from the Russian company Pro Aqua are affordable, while the quality remains at the same level. One of the main advantages that Pro Aqua products have is durability. Under normal operating conditions, the manufacturer promises a 50-year guaranteed service life. Resistance to aggressive media, alkalis, high pressure and temperatures is essential for the use of products for central heating circuits:

model name: PN25 stabi. Pro Aqua 20mm;
price: 83 rubles/m;
characteristics: aluminum reinforcement, pressure up to 20 bar, operating temperature - up to 900°C, service class - 5;
pluses: impact resistance, the possibility of bending, high permissible operating temperature;
cons: installation requires welding.

Three-layer polypropylene pipes reinforced with glass fiber is one of the achievements of Pro Aqua. The main advantage of such products is a low coefficient of linear expansion, which is especially important when arranging heating units. One of the popular options for fiberglass reinforced products is the following model:

model name: RUBIS SDR7.4. Pro Aqua 25mm;
price: 82 rubles/m;
characteristics: nominal pressure - 25.7 bar, operating temperature - up to 900 ° C, operating class - 5;
pluses: low coefficient of linear expansion;
cons: with prolonged contact with the sun's rays, destruction of products may occur.

The German company Banninger supplies the market with products for heating and plumbing made of PP-RCT polypropylene. Banninger polypropylene pipes are available in green or white. The products are characterized by high resistance to acids and alkalis. High quality products allows you to use it not only in domestic, but also on an industrial scale. Gained popularity with consumers a budget option products:

model name: Banninger PP-RCT PN16 20x2.3
price: 53 rubles / m;
characteristics: operating temperature - up to 700 ° C, operating pressure - 16 bar, wall thickness - 2.3 mm;
pluses: affordable cost;
cons: low allowable temperature.

There is another option:

model name: Banninger PP-RCT Watertec PN20 32x3.6;
price: 180 rubles/m;
characteristics: glass fiber reinforcement, working temperature - up to 700°C, working pressure - 20 atmospheres;
pluses: low coefficient of linear expansion, tear resistance, good thermal insulation qualities, minimizing losses from the coolant;
cons: low operating temperature.

The German company Wefatherm is engaged in the production of systems for plumbing and heating. The Wefatherm feature is the ideal smoothness of the inner surface. This property helps to minimize pressure losses. Experts say that the products of this company are characterized by excellent resistance to pressure and temperature changes.

Over the long period of the company's existence, the wear resistance and durability of pipes from a German manufacturer have been confirmed. Of particular note is the fact that the products are resistant to sunlight. For heating systems are often used:

model name: Wefatherm Stabi SDR 7.4 PN 20 32 X 4.4;
price: 440 rubles/m;
characteristics: PP-RCT, operating temperature - 700°C, allowable increase - up to 1000°C, diameter - 32 mm;
pluses: reliability, durability, resistance to chemicals and sunlight;
cons: high price.

One of Wefatherm's unique developments, which is becoming increasingly popular, is fiber reinforcement. Such systems are easy to install, the material does not exfoliate during operation. Such products are characterized by exceptional smoothness of the inner walls. Low coefficient of thermal expansion, environmental friendliness, high chemical resistance make products reinforced with fiber fibers ideal for heating systems. The only drawback is that the price of the German manufacturer's products is too high:

model name: SDR 7.4 Faser PN20 Wefatherm 90 x 12.3 mm
price: 604 rubles / m;
characteristics: fiber reinforcement,
pluses: simplified installation, pipes do not delaminate when exposed to high temperatures, exceptional smoothness of the walls, which ensures minimal pressure loss;
cons: thermal expansion is higher than glass-reinforced models, high price.

Heisskraft

Heisskraft is Russian company. The manufacturer claims that pipes are made in Germany, but the plant is located in Pushkino, Moscow Region. Although such a fraud of the manufacturer has already ceased to be a secret, Heisskraft PTs continue to be popular with consumers, because the quality of the products is at a decent level.

The peculiarity of Heisskraft is that it contains technical carbon black. The substance has proven itself as an excellent stabilizer for such products, therefore it improves the technical characteristics of the products.

model name: KraftStabi S3.2 (SDR7.4) PN16;
price: 52 rubles/m;
characteristics: aluminum foil reinforcement, up to 900°C;
pluses: affordable price, resistance to chemicals, no need to use metal fittings;
cons: the process of destruction begins with prolonged contact with sunlight.

For hot water, centralized and decentralized heating systems, Heisskraft has developed a thermo-stabilized pipe reinforced with FestFaser fiberglass. Such systems are used in multi-storey buildings.

model name: FestFaser (SDR 6) PN 25;
price: 520 rubles/m;
characteristics: PN 25, T max 95°C, SDR 6;
pluses: stability and preservation of characteristics during prolonged exposure to hot water, minimal linear expansion, the material is not subject to delamination, increased strength;
cons: high cost.

How to choose polypropylene pipes for heating

On modern Russian market polypropylene pipes for heating are offered by dozens of companies from all over the world. Understanding the widest range can be difficult. The main thing is to pay attention to the characteristics of polypropylene and the reputation of the manufacturer, because the manufacturer's statements do not always correspond to the real state of affairs. Before buying polypropylene products, consider the following selection factors:

Operating pressure. The number in the marking should be slightly less than what the system requires.
Temperature. The pipe must be designed for hot water, otherwise it cannot be used for heating.
Reinforcement. This factor is not mandatory, but it is better to choose models of polypropylene products with this advantage. Reinforcement can be fiberglass or aluminum.
Diameter. The indicator for this parameter cannot be less than the internal section of the risers.
Manufacturer. When buying, it is important to consider who manufactures the products. Companies that have been in this market segment for a long time and have earned the trust of consumers are preferable to obscure one-day businesses.
Price. This point does not mean that you should chase the lowest price and buy the cheapest products. It is unlikely that the pipe "for three kopecks" will be reliable and durable. Choose the right value for money so that the products last a long time and withstand all the loads.

And the high performance of polypropylene pipelines in water supply and heating systems is only the tip of the iceberg. For the correct operation of the mounted communications, it is not enough to choose the type of polymer pipe and buy the material in the right amount- preliminary design sketches are necessary, and on large objects - serious thermal and hydraulic calculations. For the heating system to be effective, polypropylene pipes for heating must have a diameter confirmed by these calculations.

Let us consider in more detail the significance of the diameter of polypropylene pipes in the construction of pipelines.

Pipe material for communications. What are the parameters of the pipe

Questions, how the water supply should look like, what diameter of pipes should be in the heat supply line, are solved at the design stage of life support systems in the house. As a result, the diameter of polypropylene pipes for water supply can often differ from the identical size of the pipeline of the heating system, since these communications have different purpose and therefore are affected by different factors.

On a note: if the boiler water supply rate in the pipeline of the heating system is less than 0.2 m / s, then there is a high probability of airing the line, and exceeding the supply rate by 0.2 m / s will lead to an increase in costs - the costs of equipment subjected to heavy loads will increase.

The use of polypropylene products has greatly simplified the work on equipping residential facilities with water heating and water supply systems. However, you need to know exactly which type of polymer pipe material is suitable in a particular case. The types of polypropylene pipes that exist today have different technical characteristics and are designed for a specific area of \u200b\u200buse.

The most reliable for the installation of water heating pipelines and hot water supply systems (DHW) are products of the PN25 or PN30 brand. It is these brands that are able to withstand pressures up to 25 and 30 atm. respectively, at a working temperature of the coolant of 95 0 C. Even short-term operation of such pipes at a water temperature of 120 0 C is allowed, since distinctive feature these products are thick-walled.

Samples of polypropylene pipes reinforced with aluminum.

For cold water supply, polypropylene pipes with a homogeneous wall are used. For DHW systems and heating circuits, reinforced products are used, since the inclusion of an aluminum shell in the wall structure of a polypropylene pipe significantly increases the strength of the pipe material and reduces the amount of thermal expansion.

For reference: thermal expansion is 0.03 mm / m 0 C, while for channels with a wall of homogeneous polypropylene this value is about 0.15 mm / m 0 C. Based on this, homogeneous products are suitable for cold water supply, and for systems heating and hot water use only reinforced polypropylene.

What diameters are produced polypropylene pipe materials

When choosing components for a heating and water supply system, the decisive factors are the temperature of the liquid, its flow rate and pressure. The required cross-sectional area of the water supply system is determined in this case by calculations made in accordance with the scope and operating conditions of the equipment.

Based on the configuration of the pipe section (round ring), its geometric parameters are determined by the outer and inner diameters. The current classification of polypropylene pipes clearly defines the typical dimensions of each type of pipe products used for installation.

To date, both domestic and foreign manufacturers produce components for pipelines in a standard version. Taking into account practical application, standard engineering solutions have been developed that allow determining the optimal passage in products for home heating and other water communications. Based on the data in the table, you can right choice equipment and components of the heat main, without resorting to hydraulic calculations.

As a rule, one of the following outer diameter values is present in the marking:

16, 20.25, 32 and 40 mm,

which correspond to the inner diameters of PN25 polypropylene pipes:

10.6; 13.2; 16.6; 21.2; 26.6 mm.

For ease of use, the correspondence between the diameters and wall thicknesses of polypropylene pipes used in heating and water supply systems is summarized in the table:

Table with data on the diameters and wall thickness of polypropylene pipes used in everyday life series

Reasonable question. Why are external parameters applied on finished products, if the size of the internal passage of the pipeline is so important for functionality. The thing is that the outer diameter indicates the appropriate type of connection.

The potential of using polypropylene pipes of various outer diameters at a coolant velocity in the pipeline of 0.7 m/s:

a pipe with a diameter of 16 mm is designed to connect one or two heating radiators;
a value of 20 mm corresponds to the connection of up to 5 radiators with a total power of up to 7000 watts);
For more radiators (with a total power of up to 11 kW), propylene polymer pipes with an outer diameter of 25 mm are used;
polypropylene pipe material with an outer dimension of 32 mm is designed to equip the house as a whole or one floor with a heating system of 10-12 kW of total power (maximum 19 kW);
products with a diameter of 40 mm are used for laying main pipelines in residential facilities large area. Usually these are cottages and country houses, in which the number of heating devices reaches 20 pieces, and the total power of all connection points is approximately 30 kilowatts.

Influence of pipe diameter on the performance of the heating system

The coolant supply rate and the amount of transferred thermal energy directly depend on the internal section of polypropylene pipelines. For clarity of this statement, the dependence of providing thermal energy on the intensity of the coolant supply and the values of the pipeline diameters is summarized in the table:

Selection table for polypropylene pipe material depending on the intensity of the coolant supply and the need for thermal energy

Thermal power is indicated in W, the intensity of the coolant supply in kg / s. The calculated data are based on average temperatures: the supplied coolant at 80 0 C, the return at 60 0 C, the air in the room +20 0 C. .

For example: at a flow rate of 0.4 m/s, the following amount of heat energy will be transferred in the pipeline:

for a line with an outer size of 20 (internal section 13.2 mm), the amount of heat is 4.1 kW;
for propylene products Ø 25 and 16.6, respectively, the amount of heat will be 6.3 kW;
propylene pipelines with outer and inner diameters of 32 and 21.2, respectively, have a thermal energy supply of 11.5 kW;
pipe materials of 40 millimeters (internal clearance size 26.6 mm) will provide heat supply in the amount of 17 kW.

With an increase in the fluid flow rate to 0.7 m/s, the intensity of the coolant supply will immediately increase by 70-80%.

Important! The practical purpose of the table above is to recommend based on the value required amount thermal energy, the required pipe diameter during the selection of pipe materials for a residential heating system.

Let's look at an illustrative example:

There is a typical house usable area 250 m2. The building is sufficiently insulated and needs heating at the rate of 1 kW per 10 square meters to create normal living conditions. m, that is, to create a comfortable temperature in the house, 25,000 watts of thermal energy (maximum) will be enough.

On a note: the first floor always requires more heat - about 2/3 of the total amount consumed.

Thus, out of 25 kW, heating the first floor will require 15 kW, the second - 10 kW.

The house is equipped with an autonomous heating system based on a double-circuit boiler. The radiators installed in the rooms are connected in parallel. The house has a wiring for two wings, with equal heat output. On the ground floor, the power for each wing is 7500 watts. For the second floor, both wings require 5000 watts each.

A two-story house with a water heating system based on an autonomous boiler - in the context

The boiler produces 25 kilowatts of thermal energy for heating the house. This means that for the heat main it is necessary to use polypropylene pipes and fittings with an inner diameter of 26.6 mm (at a feed rate of 0.6 m / s). This value corresponds to the outer diameter of the pipe 40 millimeters.

To supply the branches on the ground floor, 1500 watts of heat will be required. Using the data from the table, we get the following:

at a flow rate of 0.6 m / s, the optimal diameter of the inner lumen of polypropylene pipes will be 21.2 mm - the identical external parameter corresponding to this value, according to the table, is 30 mm;
for each wing, pipe material with an inner diameter of 16.6 mm is suitable, which corresponds to Ø 25 mm of the outer contour of the section of polypropylene pipes.

Now consider the procedure for connecting heaters.

Water heating radiators have an average power of 2 kilowatts, therefore, theoretically, pipes with minimum value outer diameter - 16 mm (PN16). However, in practice it is recommended to use polypropylene products with an internal section size of 13.2 mm and an outer diameter of 20 mm (PN20), since the use of PN16 polymer pipes is considered inappropriate due to low manufacturability.

The second floor is equipped with a 32 mm pipeline. Pipes and fittings Ø25 mm are used for each wing. With radiators, the picture is the same as on the ground floor - the batteries are connected using PN20 pipes.

Conclusion

Based on the above example, for each section of the pipeline in the heating system, it is possible to select components of the required diameter - including this, the efficiency of the heating equipment will depend.

It should be remembered that the materials for the pipeline in the heating system are selected with the calculation of compliance with the maximum technical characteristics of an autonomous boiler, despite the fact that in most cases the unit will operate in normal mode - in accordance with the specified operating parameters.

Polypropylene pipes conquer new spaces every year - they are used in many industries: mechanical engineering, agriculture and, above all, in heating, plumbing and sewerage systems. The dimensions and configuration of PP pipes are regulated by GOST. Products are divided into types depending on the qualitative composition of the raw materials, namely on the degree of modification of the base polymer with various additives.

Classification of polypropylene pipes according to the composition of raw materials

PPR (PPRS, PPR) - products of this type are made from a static copolymer of foamed propylene (or a random copolymer) with a crystalline structure of molecules. Resistant to temperature fluctuations from -170 to +1400C, shock loads, therefore, they are widely used for sewerage, plumbing and heating. They are considered the most popular material for domestic construction. The sizes are in the range of 16...110 mm and are sub-classified according to the pressure for which they are designed.
PPH products. They are made from raw materials with the addition of modifying additives: antistatic agents, flame retardants, nucleators, which give increased impact strength to the polymer. Products of this type are used for outdoor cold water supply, ventilation and sanitation. They are not suitable for heating systems, as they have a low melting point. The diameters of PPH polypropylene pipes are usually large, since they are most often used in the construction of industrial sewage and drainage systems.
PPB (block copolymer). The structure of this type of raw material consists of homopolymer micromolecules (blocks), which differ in structure, composition, and alternate with each other in a certain order. The end product of this type, due to its molecular structure, acquires an increased impact resistance and is used for underfloor heating systems, cold water supply.
PPs (polyphenyl sulfide) is a top class polymer with a special molecular structure. Possesses the increased resistance to loadings and heating, the improved indicators of wear resistance, durability. The diameter of polypropylene pipes of this type is from 20 to 1200 mm. Scope of application - ventilation, hot, cold water supply, heating.

Pressure classification

In the marking of PP products, the designation N25, N10, etc. is found. This indicator makes it possible to assess the resistance of the material to the pressure of the fluid passing through the line.
Yulia Petrichenko, expert

There are the following types of polypropylene pipes:

N10 (PN10) - with a working pressure on the wall of 1.0 MPa and a polymer thickness of 1.9 to 10 mm. They are used for arranging underfloor heating, cold water supply with heating up to +45 degrees. The diameter of polypropylene pipes of this type is: outer - 20 ... 110 mm, inner - 16 ... 90 mm.
PN16 is a rarely used type of product with a wall pressure of 1.6 MPa. Suitable for supplying cold and hot water with liquid heating up to +60 degrees.
N20 (PN20) - lines made of polypropylene with a working pressure on the wall of 2.0 MPa and a product thickness of 16 ... 18.4 mm. The most popular material for hot and cold water supply with a liquid heating temperature of up to 80 degrees. Execution: outer diameter - 16 ... 110 mm, inner - 10.6 ... 73.2 mm.
N25 (PN25) - polypropylene pipe with a working pressure on the wall of 2.5 MPa and reinforcement with aluminum foil. Ideal for heating systems, hot water supply with a coolant temperature up to +95 degrees. Due to the multilayer structure, products of this type have increased resistance to shock and thermal loads. Execution: inner diameter of PN25 polypropylene pipes - 13.2 ... 50 mm, outer - 21.2 ... 77.9 mm.

What determines the size of polypropylene pipes

For comparison with metal products Table 1 shows the diameters of polypropylene pipes in mm:

Table 1. Diameters of polypropylene pipes, mm

Equivalent passage, mm	Outer diameter, mm
Equivalent passage, mm	Steel gas pipelines	Steel plumbing	Polymer
10	17	16	16
15	21.3	20	20
20	26.8	26	25
25	33.5	32	32
32	43.2	42	40
40	48	45	50
50	60	57	63
65	75.5	76	75
80	88.5	89	90
90	101.3
100	114	108	110
125	140	133	125
150	165	159	160
160		180	180
200		219	225
225		245	250
250		273	280
300		325	315
400		426	400
500		530	500
600		630	630
800		820	800
1000		1020	1000
1200		1220	1200

How to choose the right line size

We select the inner diameter of polypropylene pipes by elementary calculation with the initial data:

the speed of fluid movement along the line;
water consumption.

The diameter of polypropylene pipes for the water supply of a private house or mansion is calculated by the formula:

D=√((4)-Q-(1000/π∙v)) where v is the speed of the passing flow, m/s (assumed from 0.7…2 m/s);
π is the number Pi, equal to 3.14.

The diameter of the pipes for the water supply of a private house in practice is 20 mm by default. For a multi-storey building, at each stage of construction, different diameters of polypropylene pipes are used based on a refined calculation: for supplying water to each apartment, to each entrance, to the house, quarter, microdistrict, various parameters of the mains are used. Accordingly, the higher the water consumption, the larger sizes are accepted.

In practice, in apartment buildings, the following sizes of polypropylene pipes are used in mm:

for risers of 5-storey buildings Ø25 mm;
indoor wiring - the diameter is taken 20 mm;
for risers of houses of 9 or more floors, polypropylene pipes with a diameter of 32 mm are accepted.

Polypropylene pipes - dimensions, table

The diameters of the assortment of polypropylene pipes are shown in table 2:

Table 2. Classification of diameters of polypropylene pipes, mm

Outer diameter, mm	PN10		PN20		PN30
Outer diameter, mm	Inner diameter	Wall thickness	Inner diameter	Wall thickness	Inner diameter	Wall thickness
16			10.6	2.7
20	16.2	1.9	13.2	3.4	13.2	3.4
25	20.4	2.3	16.6	4.2	16.6	4.2
32	26.0	3.0	21.2	5.4	21.2	3.0
40	32.6	3.7	26.6	6.7	26.6	3.7
50	40.8	4.6	33.2	8.4	33.2	4.6
63	51.4	5.8	42	10.5	42	5.8
75	61.2	6.9	50	12.5	50	6.9
90	73.6	8.2	6	15
110	90	10	73.2	18.4

For ventilation systems and gutters of industrial buildings, polypropylene pipes are used, the dimensions of which exceed Ø400 mm.

For self-installation of heating, plumbing and sewerage systems in a private house or apartment, it is important not only to choose the correct dimensions of the mains, but also to connect them correctly. This will require special welding equipment, some skill and ability to use it. Therefore, it is better if professionals will deal with the design of communications and their laying.

In the article, we briefly described the classification and main parameters of polypropylene water mains used for the installation of external and internal heating, sewerage, ventilation, and water supply systems. The range of products of various diameters and purposes allows the implementation of complex construction projects, piping hot water, cold water and heating aesthetically, quickly, and reliably.

How do you manage to replace old ones? steel pipes for polypropylene? What size trunks do you use when arranging intra-house communications?

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Diameters of polypropylene pipes: dimensions in mm, table, internal diameter of PP pipes - print version

Polypropylene pipes, widely used for the installation of heating systems, cold and hot water supply, as well as other engineering systems, are represented by a fairly wide range. Different types of products are various characteristics and scope. Therefore, when choosing pipe products, it is important to understand which polypropylene pipe is best suited for certain purposes.

Features of marking polypropylene pipes

To choose the right types and characteristics of PP pipes, you need to pay attention to their marking. First of all, you need to pay attention to the designations that characterize the working pressure and temperature of pipe products. The current standardization system classifies polypropylene pipes into 4 groups:

PN10 - polypropylene pipes, designed for a working pressure of 10 atmospheres and operating temperature up to +45 °С. Such products have thin walls and can only be used to transport cold liquids;
PN16 - PP pipes, designed for working pressure up to 16 atmospheres and working temperature up to +60 °C. Not intended for hot water and heating systems;
PN20 - polypropylene pipes designed for working pressure up to 20 atmospheres and working temperature up to 95 °C. They can be used in heating and hot water supply systems, however, due to significant temperature deformation, their use in these systems is limited;
PN25 - polypropylene pipes designed for working pressure up to 25 atmospheres and working temperature up to 95 °C. Pipes polypropylene PN 25 are produced in a reinforced version. A layer of aluminum foil or fiberglass serves as a reinforcing element. The use of an additional reinforcing layer significantly increases the strength characteristics and reduces thermal deformation. Thanks to this, reinforced pipes for heating and hot water are optimally suited.

Advantages and disadvantages of polypropylene pipes

When installing heating systems, the question often arises which pipes are better: polypropylene, metal-plastic or metal. To determine this issue, it is important to take into account all the advantages and disadvantages, as well as the characteristics of polypropylene pipes.

The main advantages of reinforced pipes made of polypropylene are their following features:

It is also necessary to consider the disadvantages characteristic of pipes made of this material. The main disadvantage for heating systems is, of course, the high value of the coefficient of linear expansion. This can lead to deformation of the pipelines and their release from the fasteners, which is often accompanied by depressurization at the joints and causes leakage. In this regard, it is recommended to use reinforced PP pipes, in which the coefficient of thermal expansion is much lower. However, reinforcement does not completely eliminate thermal deformation, so the installation technology provides for the installation of attachment points and expansion joints at certain intervals.

Another disadvantage is that polypropylene pipes do not undergo deformation during installation. Therefore, special fittings are necessarily used to perform turns. In addition, when performing installation work and placing pipelines, it is important to take into account the negative impact solar radiation, which can cause accelerated aging of the material.

In general, we can say that the ratio of the advantages and disadvantages of polypropylene pipes determines their high efficiency when used as part of heating systems, as well as in other engineering networks.

Features of the choice of polypropylene pipes

When choosing polypropylene pipes, four main parameters must be considered:

maximum operating temperature;
maximum working pressure;
diameter;
linear expansion coefficient.

The values of these parameters should be related to the purpose and operating conditions of the installed pipelines.

The maximum operating temperature determines the possibility of using pipes of a certain brand for completing engineering systems for a specific purpose. So, pipes PN10 and PN16 can only be used to transport cold water. PN20 products can be used for hot water systems, and PN25 pipes are best suited for heating.

For domestic systems, pipes with almost any working pressure can be used. However, the value of this parameter, especially in combination with temperature, directly determines the service life of products. That is why for operation as part of a heating system, it is necessary to choose pipes designed for the highest working pressure.

The diameter of a polypropylene pipe determines its throughput, which makes it possible to use it in certain conditions. For example, a 32 mm or 40 mm polypropylene pipe is used for mounting risers. Internal wiring is used with a 20 mm polypropylene pipe. Also, 25 mm polypropylene pipes can be used for the same purpose.

The linear expansion coefficient is important parameter, which determines the degree of change in the geometry of the product under the influence of high temperature. Depending on this coefficient, the possibility of using pipes for heating or hot water supply, as well as the method of their installation, is determined. So, PN20 pipes have a higher coefficient of linear expansion, so they are not allowed to be laid in a closed way. Deformation of the pipe when it is heated can lead to the destruction of the plaster. At open method gaskets require more frequent installation of fasteners and expansion joints. PN25 have a much lower coefficient of linear expansion, which allows them to be installed both inside walls and outside.

Assortment of polypropylene pipes

Depending on the composition of the material, the following types of polypropylene pipes are distinguished:

PPH is a hard plastic polypropylene homopolymer. It is characterized by poor resistance to high temperatures, therefore it is used exclusively in cold water networks, in ventilation and air conditioning systems;
PPB is a complex block copolymer of polypropylene and polyethylene. Differs in high elasticity, possesses sufficient temperature stability. Thanks to this, PPB pipes can be used for the installation of underfloor heating. They are also used in water supply networks, ventilation systems, industrial pipelines;
PPR (PPCR) is a random copolymer of polypropylene, in the molecular chain of which there are ethylene molecules. Pipes made of this material can be used as part of hot water supply and heating systems at a maximum coolant temperature of up to 70 °C.
PPs. Flame retardant polypropylene homopolymer. The most suitable material for the production of pipes for heating systems. Withstands operating temperatures up to 95 °C.

Color of polypropylene pipes

Polypropylene pipes can be produced in four color options: white, gray, black, green. The color depends on the composition and properties of pipe products, which determines the scope of its application.

White and gray pipes are widely used for the installation of almost all utilities, including heating and water supply systems. A limitation in the use of white pipes is their low frost resistance, which does not allow them to be used in outdoor conditions.

As for gray pipes, they have the following advantages:

ability to withstand significant working pressure;
high chemical and temperature resistance;
significant durability;
simple installation by soldering.

Black pipes made of polypropylene are used for the installation of sewerage and drainage systems. Thanks to the use of special additives, they have the following features:

high resistance to aggressive substances;
increased strength characteristics;
resistance to ultraviolet radiation;
long service life.

Green pipes are the cheapest type of product. They are used in private houses and cottages for irrigation systems.

Corrugated polypropylene pipes

A special variety are corrugated pipes from polypropylene. They are used to create sewerage systems, water disposal, storm sewer, drainage. Modern products of this type are designed to receive wastewater with temperatures up to 60 °C, and with short-term exposure - up to 100 °C.

Today, two-layer corrugated pipes made of polypropylene are produced. They have the following advantages:

high chemical resistance;
elevated level ring stiffness;
excellent dielectric properties;
maintaining high throughput throughout the entire service life;
high resistance to abrasive wear;
long service life.

Features of the installation of polypropylene pipes

Installation of pipes made of polypropylene is carried out by the method of thermal polyfusion. Its essence is to heat the parts to be joined using a special soldering iron to a temperature of about 260 ° C, after which they are quickly connected.

When brazing polypropylene pipes, it is very important to comply with the technological requirements for heating time, which depends on the following factors:

diameter of connected pipes;
ambient temperature;
welding belt width.

Heating provides the necessary plasticity of the material, which is maintained for several seconds. Therefore, it is very important to quickly fix the connection node, while ensuring the correct location of the mating parts. It is also important to avoid excessive heating, which can lead to deformation of the pipes.

Optimal heating time when welding polypropylene pipes of different diameters:

with a diameter of 20 mm: 8-9 seconds;
with a diameter of 25 mm: 9-10 seconds;
with a diameter of 32 mm: 10-12 seconds.

The same time is needed to fix the connection. If this requirement is violated, deformation of the joint may occur, which will lead to its depressurization.

Sale of polypropylene pipes

Trademark Lammin sells polypropylene pipes and fittings from the manufacturer in bulk. With us you have the opportunity to order a wide range of products of excellent quality, perfectly adapted for durable and reliable operation in heating systems. At the same time, we have favorable prices for.