Pipes polypropylene water assortment. Polypropylene pipes. Types and technical characteristics. How to choose polypropylene pipes
Polypropylene pipes are manufactured in accordance with GOST and their dimensions are regulated by the standard. The diameter of the internal highways - 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.
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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 low temperature melting. Diameters polypropylene pipes RPH, as a rule, are large, since they are most often used in the construction of industrial sewage and sanitation.
- 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, 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, and 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.
For comparison with metal products, table 1 shows the diameters of polypropylene pipes in mm:
| Equivalent passage, mm | Outer diameter, 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 | |
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 marking polymer pipes Diameters are for outside only.
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 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 big sizes 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
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 basins 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.
The diameters of the assortment of polypropylene pipes are shown in table 2:
| Outer diameter, mm | PN10 | PN20 | PN30 | |||
|---|---|---|---|---|---|---|
| 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 drains of industrial buildings, polypropylene pipes are used, the dimensions of which exceed Ø400 mm.
For self installation 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 external and internal systems heating, sewerage, ventilation, water supply. 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
And high performance characteristics of polypropylene pipelines in water supply and heating systems - only top part iceberg. For the correct operation of the installed 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 at large facilities - 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 the probability of airing the line is high, and exceeding the supply rate by 0.2 m / s will lead to an increase in costs - the costs of equipment exposed 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 existing today have various specifications and designed for a specific area of use.
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 operating temperature coolant 95 0 C. Even short-term operation of such pipes is allowed at a water temperature of 120 0 C, 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. With considering practical application standard engineering solutions have been developed to determine 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 40mm,
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 on finished goods external parameters are applied, 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 a larger number of 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 of a 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 above table is to recommend, based on the value of the required amount of thermal energy, the required pipe diameter during the selection of pipe materials for a residential heating system.
Let's look at an illustrative example:
Available model house usable area of 250 m 2 . 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 comfortable temperature 25,000 watts of thermal energy (maximum) will be enough in the house.
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.
Two-storey 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). given value corresponds to an 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 optimal diameter the internal 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 a minimum outer diameter of 16 mm (PN16) are suitable for their insertion into the circuit. However, in practice it is recommended to use polypropylene products with an inner section 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 normally - in accordance with the specified operating parameters.
This article will present polypropylene pipes for water supply with a description of their main properties, types and scope. As well as metal-plastic pipes, or a heating system made of polypropylene pipes may not even have vocational training Human. 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 of individual houses. This is explained by the availability and low price of all components, simplicity and reliability of installation, long service life (over 50 years), absence of corrosion and build-up, attractive appearance, possibility of use 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:
Pipe class | Operating temperature max, ˚C | Application |
| For cold water supply | ||
| Hot water supply | ||
| Hot water supply | ||
| Low temperature underfloor heating | ||
| High temperature underfloor heating, low temperature radiator heating | ||
| High temperature radiator heating |
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, and reinforced 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 heating closed view with a long length of 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.
In addition, polypropylene pipes can be divided into the following categories:
Working pressure, MPa | Application area |
|
| Cold water supply up to +20 ˚C, heated floors up to +45 ˚C | ||
| Cold water supply with high blood pressure, hot water up to +60 ˚C | ||
| Suitable for cold and hot water up to + 80 ˚C | ||
| reinforced aluminum pipe for hot water and heating at +95 ˚C |
The color of polypropylene pipes does not indicate their technical characteristics and scope. Depending on the manufacturer, it may be:
- Grey;
- White;
- Greens;
- Black;
- With red stripe.
Selection and application of polypropylene pipes for water supply
The scope of application of polypropylene pipes in individual houses, baths and outbuildings is extensive - from hot to the arrangement of radiator and floor heating. 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.
- In order to avoid additional difficulties in 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 who have proven themselves with better side and providing certificates of conformity to 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 simple 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.