Dimensions, technical characteristics and scope of application. Polypropylene pipes

Plastic pipes have long been an excellent alternative to metal products. This popularity is explained by the strength and durability of polymer materials. In addition, polypropylene pipes have a composite structure, which allows the material to withstand high temperatures and pressure (without deformation), not be subject to corrosion, and not react to aggressive components.

In addition, the installation of such pipelines is much simpler: the plastic is easily processed and heat welded. In this article we will look at the key parameters that will be useful as home handyman as well as a professional plumber.

Scope of application of pipes made of polymer material

Considering that polypropylene pipes are able to function in almost any conditions, the products have a wide range of applications. In particular:

Hot and cold water supply in multi-storey and private buildings.

Sewerage.

Installation of a “warm floor” system in the house.

Diversion of soil and Wastewater.

Creation of drainage, irrigation and reclamation systems.

Ventilation.

Pneumatic systems.

Pipelines for transporting chemically active substances.

It should be noted that depending on the application, different types of pipes are used. Subject to operating conditions, these products can last about 50 years old without loss of functionality.

Physico-mechanical characteristics

Melting point: +149C (GOST 21553).

Density: 0.9 g/cu.m. cm (GOST 15139).

Yield strength (tension): from 24 to 25 N/kV. mm (GOST 11262).

Tensile strength: from 34 to 35 N/kV. mm (GOST 11262).

Elongation at yield point: 50%.

Expansion coefficient: 0.15 mm/mmS (GOST 15173).

Thermal conductivity (at +20C): 0.24 W/mS (DIN 52612).

Specific heat capacity (+20C): 2 kJ/kgC (GOST 23630).

Advantages and disadvantages of plastic pipes

Polypropylene has a number of undeniable advantages over metal pipelines. The strengths of the material include the following:

Long lifetime. Manufacturers assure that pipes used in cold water supply can last at least 100 years.

Low weight. Polypropylene is a lightweight material. If we compare products of similar length and diameter made of plastic and metal, the former will be approximately lighter 9 times.

Easy installation. A person who does not have special skills and knowledge can handle the installation of such a water supply system.

Elevated sound insulation level. Pipes in residential buildings do not allow noise to pass through.

Corrosion resistance. The inner surface of the pipe is processed according to special technology, which eliminates the appearance of solid formations that reduce the throughput of the pipeline.

In addition, one can note high resistance to low temperatures and dynamic loads. Such pipes do not require special maintenance, are sold in an affordable price segment.

The material also has some disadvantages. In particular:

There remains a high probability of linear expansion, which requires installation special compensators.

Accelerated aging of the material under the influence of direct sun rays.

Low temperature resistance, which implies the mandatory use of insulation.

In addition, wall mounting pipelines are not allowed to sag, so the number of fastening elements increases significantly.

Symbols - markings

By marking polypropylene pipes you can find out about the raw materials used for production and technical features material. The symbols given above indicate the ability of pipes to withstand a certain pressure inside the pipeline.

Now let's look at the markings, which indicate some properties of the material. In the construction market, you can find pipes of the following categories:

PPB- products with high resistance to mechanical damage and water hammer, used in “warm floor” and cold water supply systems.

P.P.H.- pipes large diameter, which are usually used when installing ventilation systems.

PPR- universal products, equally effective in hot and cold water supply.

Regardless of the marking, polypropylene pipes are made of plastic. However, manufacturers usually add active additives to the raw materials that increase the elasticity and heat resistance of the material.

Types and classification

There are 4 classification groups, which are divided according to operating pressure parameters. It looks like this:

PN 10. Used to transport liquids at low temperatures - up to +45 degrees.

PN 16. Suitable for arranging a gas or liquid transport system, provided that the coolant temperature does not exceed +60 degrees.

PN 20. Widely used pipes that can withstand temperatures up to +95 degrees.

PN 25. Products for supplying hot water and steam, with coolant temperatures up to +100 degrees.

The numerical designation of each group indicates the pressure value in atmospheres inside the line. Design pressure depending on service life and temperature:

Temperature (°C)	Service life (years)	Pipe type
		PN 10	PN 16	PN 20	PN 25
		Permissible excess pressure, kgf/cm2
20	10	13,5	21,7	21,7	33,9
	25	13,2	21,1	26,4	33,0
	50	12,9	20,7	25,9	32,3
30	10	11,7	18,8	23,5	9,3
	25	11,3	18,1	22,7	28,3
	50	11,1	17,7	22,1	27,7
40	10	10,1	16,2	20,3	25,3
	25	9,7	15,6	19,5	24,3
	50	9,2	14,7	18,4	23,0
50	8,7	13,9	17,3	23,5	21,7
	25	8,0	12,8	16,0	20,0
	50	7,3	11,7	14,7	18,3
60	10	7,2	11,5	14,4	18,0
	25	6,1	9,8	12,3	15,3
	50	5,5	8,7	10,9	13,7
70	10	5,3	8,5	10,7	13,3
	25	4,5	7,3	9,1	11,9
	30	4,4	7,0	8,8	11,0
	50	4,3	6,8	8,5	10,7
80	5	4,3	6,9	8,7	10,8
	10	3,9	6,3	7,9	9,8
	25	3,7	5,9	7,5	9,2
95	1	3,9	6,7	7,6	8,5
95	5	2,8	4,4	5,4	6,1

By type, products are divided into reinforced and non-reinforced. For the second group, reinforcement with the following materials is allowed:

Fiberglass.

Internal reinforcement with perforated foil.

External - a layer of aluminum.

Composite: internal layers made of glass or fiberglass.

For the installation of hot water supply or heating systems, only reinforced pipes are used.

Standard Size Charts

Considering that pipes of this type are used almost everywhere, manufacturers produce products in a wide size range. Product sizes vary within the following limits:

Diameter - from 5 to 400 mm. Small pipes are usually used when laying pneumatic systems, medium pipes are used for private and multi-storey construction, large pipes are used for equipping buildings where high throughput is required. engineering communications.

Length - standard value is 4 meters, however, this is not a reference characteristic and remains at the discretion of the manufacturer.

Wall thickness - 1.9-15.1 mm.

It should be clarified that polypropylene pipes can be made in the form of a monolayer or multilayer structure. The second option involves reinforcement: a five-layer structure, where there is an aluminum spacer between the layers of plastic. The thickness of the reinforcing layer usually varies within 0.1-0.5 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

See size tables for water and gas steel pipes. Learn about nominal diameter and how to avoid confusion between inches and mm.

Equivalent passage, mm	Outer diameter, mm
Equivalent passage, mm	Steel gas pipelines	Steel water pipes	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

Some important installation nuances

The installation of plastic pipes is somewhat different from their metal counterparts. In particular, during installation the following conditions must be observed:

Polypropylene pipes do not bend at right angles; tees and fittings are used here to change the direction of the line.

The plastic does not collapse under the influence of temperature changes: the pipe increases in length. Therefore, if the length of the pipeline section exceeds 10 meters, temperature compensators must be installed.

Under the influence of high temperatures, pipes are subject to linear expansion, so rigid fixation of the pipeline inside wall structures is not allowed: thermal gaps must be left.

For hot water supply, only reinforced products are used, which are less susceptible to linear expansion.

Slight bending of the pipe is allowed. This can be done by heating the surface with a hair dryer (temperature approx. 140 degrees).

It should be noted that storing plastic pipes in open spaces is not recommended. To protect products from direct sunlight, which destroys the structure, canopies must be installed.

Key selection criteria

To buy high-quality pipes that will easily reach the service life declared by the manufacturer, you must follow the selection recommendations:

Selection of components.

During installation, you will definitely need couplings, fittings, and wiring tees. The ideal option would be combined elements with threaded inserts or metal frames. Such products will provide a high-quality transition between plastic and metal pipes.

Manufacturer.

The products are in consistently high demand all over the world, so plastic pipes are produced by domestic, European and Asian companies. Pipes produced by German, Czech and Russian companies have proven themselves well. Products from Turkish and Chinese manufacturers should be treated with caution: low cost implies low quality.

Marking.

Here you need to pay attention to the pipe capacity, resistance to water hammer and temperature changes. The best option is to choose a pipe whose characteristics slightly exceed the required values.

It should be noted that the durability of a plastic pipeline is affected not only by the characteristics of the product, but also by the correct installation.

Rating of trusted manufacturers

Among companies engaged in the production of polypropylene pipes, the most popular brands are:

WAWIN ECOPLASTIK. A Czech company that has managed to win a high rating among builders all over the world. The manufacturer's revolutionary solution is all-plastic FIBER pipes, which have minimal weight, but at the same time show high strength and resistance to linear expansion.

FV-PLAST. Another Czech company presented on the market with reinforced pipes with perforated aluminum inserts. The products produced have a wide size range and are ideal for installing hot and cold water supplies.

PRO AQUA. A Russian enterprise engaged in the production of multifunctional polypropylene pipes. The company's products are distinguished by high technical characteristics, while being sold in an affordable price range.

In addition, you can pay attention to the products of such companies: BANNINGER REISKIRCHEN (Germany) and VALTEC (Italy). Plastic pipes of these brands are in the high price segment, but have almost standard quality.

Watch a competent video on how to properly solder polypropylene pipes

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

Let us consider in more detail the importance of the diameter of polypropylene pipes when installing pipelines.

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

Questions about what the water supply system should look like and what diameter of the pipes should be in the main supply line that supplies heat are resolved at the stage of designing 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 heating system pipeline, since these communications have different purposes and therefore are exposed to various factors.

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

The use of polypropylene products has significantly simplified the work of equipping residential buildings with water heating and water supply systems. However, you need to know exactly what 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 use.

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

Samples of polypropylene pipes reinforced with aluminum.

For cold water supply, polypropylene pipes with a uniform wall are used. Reinforced products are used for hot water supply systems and heating circuits, 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, whereas for channels with a wall made 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 only reinforced polypropylene.

What diameters are polypropylene pipe materials produced?

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 by calculations made in accordance with the scope of application 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 tubular products used for installation.

Today, both domestic and foreign manufacturing companies produce components for pipelines in standard versions. Taking into account 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 table data, you can make right choice equipment and components of the heating main, without resorting to hydraulic calculations.

As a rule, the marking contains one of the following outer diameter values:

16, 20,25, 32 and 40 mm,

which correspond to the internal diameters of polypropylene pipes grade PN25:

10.6; 13.2; 16.6; 21.2; 26.6 mm.

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

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

A reasonable question. Why are external parameters marked on finished products if the size of the internal passage of the pipeline is so important for functionality? The whole point is that outside diameter indicates the corresponding type of connection.

Potential for using polypropylene pipes of various outer diameters at a coolant flow rate in the pipeline of 0.7 m/sec:

a pipe with a diameter of 16 mm is designed to connect one or two heating radiators;
a value of 20 mm corresponds to connecting up to 5 radiators with a total power of up to 7000 watts);
for a larger number of radiators (total power up to 11 kW), propylene polymer pipes with an outer diameter of 25 mm are used;
polypropylene pipe material with an outer size of 32 mm is designed to equip a whole house 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 large residential buildings. Typically these are cottages and country houses in which the number of heating devices reaches 20 units, and the total power of all connection points is approximately 30 kilowatts.

The influence of pipe diameter on the performance characteristics of the heating system

The rate of coolant supply and the volume of transferred thermal energy directly depends on the internal cross-section of polypropylene pipelines. To make this statement clearer, the dependence of the provision of thermal energy on the intensity of coolant supply and the values of pipeline diameters is summarized in the table:

Table for selecting polypropylene pipe material depending on the intensity of coolant supply and the need for thermal energy

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

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

for a line with an outer size of 20 (internal cross-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 a heat supply of 17 kW.

When the fluid flow rate increases to 0.7 m/sec, the coolant supply intensity will immediately increase by 70-80%.

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

Let's look at an illustrative example:

Available standard house usable area 250 m2. The building is sufficiently insulated and to create normal living conditions it needs heating at the rate of 1 kW per 10 sq. m. 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 - approximately 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 wiring for two wings, with equal thermal power. On the ground floor, the power for each wing is 7500 watts. For the second floor, both wings require 5000 watts.

Two-story house with a water heating system based on an autonomous boiler - cross-section

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

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

at a flow speed of 0.6 m/sec, the optimal diameter of 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, a pipe material with an internal diameter of 16.6 mm is suitable, which corresponds to a Ø 25 mm external contour of the cross-section of polypropylene pipes.

Now let's look at the procedure for connecting heating devices.

Water heating radiators have an average power of 2 kilowatts, so theoretically, pipes with a minimum outer diameter of 16 mm (PN16) are suitable for inserting them into the circuit. 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 pipeline with a cross-section of 32 mm. For each wing, pipes and connecting fittings Ø25 mm are used. The situation with radiators is the same as on the first floor - the batteries are connected using PN20 pipes.

Conclusion

Based on the above example, components can be selected for each section of the pipeline in the heating system required diameter— the efficiency of heating equipment will also depend on this.

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

Polypropylene pipes (PP) are considered by experts today to be the best pipe products. They have good technical and operational characteristics and differ in their purpose, color, quality and scope of application. They are used for laying both indoor and outdoor utilities.

Marking of polypropylene pipes

When choosing polypropylene products, attention is first paid to the markings applied to them. This is explained by 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 pressure.

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 capable of withstanding pressure not exceeding 10 atmospheres. At the same time, the maximum temperature regime The working environment cannot be above 45 degrees Celsius. Using pipes of this type, communications are installed that can transport exclusively cold liquids. Since this pipe product has thin walls, it is not widely used in the construction of internal water supply systems.
PN16. The presence of such symbols means that polypropylene pipes can withstand pressure of no more than 16 atmospheres and can carry liquid whose 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 influence of high temperature, which is unacceptable when creating pressure pipelines providing hot water or heat supply.
PN20. As evidenced by this marking, pipe products can withstand pressure of about 20 atmospheres (read also: “What does the marking of polypropylene pipes mean - reading features”). Hot water at a temperature of up to 95 degrees can move through it. The technical parameters of polypropylene pipes of this group allow them to be used in hot water supply systems. Currently, they are practically not used due to the occurrence of significant deformation in pressure-type heating structures. When moving through such a PP pipe under high pressure of a liquid that has a maximum permissible temperature, the product begins to lead and bend.
PN25. Pipes made of polypropylene with this marking are complete products for laying heating systems. They can hold a pressure of 25 atmospheres without any problems. In their production they use composite material together with reinforcing inserts made of nylon fiber or aluminum foil. A layer of them reduces temperature 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 of both multi-storey buildings and small country houses.

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

Long service life of approximately 50 years. When pipes are used in cold water supply systems, according to manufacturers, they can be used for up to 100 years.
On inner surface products do not collect solid deposits, since a special processing technology is used at the production stage.
No condensation and frost resistance due to low thermal conductivity.
Low weight of 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 purchase pipes of different price categories.

In addition to the advantages, polypropylene pipes have disadvantages:

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

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

The process of selecting polypropylene pipes

In order to select these products without error, you should consider four important points in addition to the product labeling, which was described above:

Maximum permissible temperature. It was previously said that for heating systems the best choice would be products with the symbols PN25, for hot water supply - PN20 and for cold water supply structures - PN16.
Diameter. The cross-section is selected taking into account the technical parameters that the pipeline must have. The optimal choice for wiring in apartments is considered to be pipes in which this parameter is 20 or 25 millimeters, for arranging drains - 32 or 40 millimeters. Large-diameter PP pipe with thick walls is used for laying main pipelines that are located in basements multi-apartment buildings.
Maximum value permissible pressure . If we are talking about domestic use, then all pipes are suitable, including PN10 products. Their service life is directly related to the pressure in the line and the temperature of the working environment. For example, if the liquid temperature remains at 95 degrees for a long time, when constant pressure the product 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. Polypropylene products are distinguished by their ability to change their geometry when transporting high-temperature water. These changes relate to the thickness of the pipe walls, and this is very critical for the throughput of pipelines.

Experts do not recommend laying products marked PN20 using the closed method, since as a result of their deformation, cracks will appear in the plaster layer. As for the use of PN25 products, they can be installed in both ways - open and closed.

The open version will not deteriorate 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 global market, PP pipes are presented in the following range.

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

PPB – type 2. This type of rolled polypropylene pipe is made from a complex block copolymer. Such products are used in the construction of pressure systems for supplying cold liquids and heat supply. These products are also used in the production of high-strength impact connecting elements.

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

This molecular structure provided the following characteristics of the PPR pipe:

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 of the working environment for a short time up to 140 degrees and continuously up to almost 90 degrees;
frost resistance - products completely restore their shape after exposure to negative temperatures.

The technical characteristics of polypropylene PPRC pipes have made them an alternative to galvanized metal products. Among them there 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, highly durable polymer. The maximum permissible temperature of the working medium of these PP pipes is 95 degrees. Experts consider them the best option for non-reinforced single-layer products for heating systems.

Color of polypropylene pipes

Polypropylene pipe products are produced in four colors.

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

White PP products. They are used in the construction of water supply systems. They are easily installed by welding, so the work can be completed in the shortest possible time. White propylene pipes are not recommended for use outdoors and at low temperatures. Products should be transported with extreme caution, since any physical or mechanical impact on them may 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 for both individual and centralized heating systems. Their main technical characteristics: thermal and chemical resistance, long-term operation, environmental friendliness, tightness, etc. They are securely connected using a soldering iron.
Black PP pipes. Experts recommend using them when arranging sewer communications and drainage structures. In the production of these products, special additives are used that improve their technical parameters. Black pipes have a number of advantages: resistance to UV radiation, various aggressive environments and drying out; high strength.
Green polypropylene products. Pipes of this color are chosen for installing irrigation systems and watering of the garden area. They are inexpensive and therefore owners of summer houses 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 bursting is quite high.

Corrugated polypropylene pipes

This type of pipe products is used to create utilities for water drainage and sewerage, as well as structures for the disposal of atmospheric precipitation and groundwater. The maximum permissible 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 installation method. Transitions are constructed 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 has been mastered.

Their positive qualities are:

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

Among the disadvantages 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 using a soldering iron.

Some manufacturing companies equip the welding tool with two rather than one heating element. In this case, the power becomes sufficient to heat pipe sections of different diameters without any problems.

But this advantage can at the same time become a disadvantage. Heating with two elements at once can overheat the plastic and overload the power supply network. For this reason, the second heater should only be used as a backup when the first one 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 a short period of time. In a matter of seconds, you need to fix the connection, preventing distortions from occurring. The optimal temperature for heating is + 260 degrees.

To ensure a reliable and durable connection, polypropylene must be heated strongly, but excessive heating can lead to the product losing its shape. 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 millimeters – 10-12 seconds.

It is not enough to heat and connect polypropylene pipes; they must also be cooled properly. The fixation period should last as long as the heating phase. If this process is completed early due to haste, the connection will be subject to 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 soldering rules.

The main nuances of the process are as follows:

The welding machine must be kept switched on at all times during work.
Markings should be applied to the surface of the pipes to ensure the required depth of welding seams.
The parts to be joined must be heated at the same time.

Most developers, having become familiar with the advantages of polypropylene pipe products, choose these products. The funds spent on purchasing PP pipes will certainly pay off over time.

Polypropylene pipe: ppr polypropylene, technical characteristics, ppr weight, parameter, properties, description

Dimensions and classification of polypropylene pipes

Polypropylene pipes are manufactured in accordance with GOST and their sizes are regulated by the standard. The diameter of the internal lines 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.

Manufacturers produce polypropylene pipes of different diameters

Polypropylene pipes are conquering new spaces every year - they are used in many industries: mechanical engineering, agriculture and, above all, in heating, water supply 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 the degree of modification of the main polymer with various additives.

Classification of polypropylene pipes according to the composition of raw materials

PPR (PPRC, PPR) - products of this type are made from a static copolymer of polypropylene foam (or random copolymer) with a crystalline molecular structure. They are resistant to temperature fluctuations from -170 to +1400C and shock loads, therefore they are widely used for sewerage, water supply and heating installations. They are considered the most popular material for household construction. The sizes are in the range of 16.110 mm and are subclassified 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, fire retardants, nucleators, which give increased impact strength to the polymer. Products of this type are used for external cold water supply, ventilation and drainage. They are not suitable for heating systems because they have a low melting point. The diameters of polypropylene pipes RPH, as a rule, are large, since they are most often used in the installation industrial sewerage and drainage.
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 final product of this type, due to its molecular structure, acquires increased impact resistance and is used for underfloor heating systems and cold water supply.
PPs (polyphenyl sulfide) is a high-class polymer with a special molecular structure. It has increased resistance to loads and heat, improved wear resistance and strength. The diameter of polypropylene pipes of this type is from 20 to 1200 mm. Scope of application: ventilation, hot and 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 evaluate the resistance of the material to the pressure of the liquid passing through the line.

The following types of polypropylene pipes are distinguished:

N10 (РN10) – with a working pressure on the wall of 1.0 MPa and a polymer thickness from 1.9 to 10 mm. Used for arranging heated floors, cold water supply with heating up to +45 degrees. Diameter of polypropylene pipes of this type: external – 20…110 mm, internal – 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 (РN20) – 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. Version: outer diameter - 16...110 mm, inner diameter - 10.6...73.2 mm.
N25 (РN25) – polypropylene pipe with a working pressure on the wall of 2.5 MPa and reinforcement with aluminum foil. Ideal for heating systems and hot water supply with coolant temperatures up to +95 degrees. Thanks to the multilayer structure, products of this type have increased resistance to shock and thermal loads. Execution: internal diameter of polypropylene pipes РN25 – 13.2…50 mm, external diameter – 21.2…77.9 mm.

Currently, there is an option to reinforce polypropylene mains with fiberglass. This allows you to avoid delamination of water pipelines during operation, and during installation - loss of time for cleaning the cuts during welding. Systems with fiberglass mesh reinforcement are most preferable, as they provide quick installation, resistance to deformation, and extended service life without repairs.

What determines the dimensions 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 product configuration is selected depending on the purpose. For each type of classification, there is a table of sizes of polypropylene pipes, according to which a suitable product is selected.

What are the sizes of highways? The physical parameters of sewerage, heating, and 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 their service life is much longer. In addition, the polymer benefits from aesthetic properties and corrosion resistance.

The diameter of the pipe is selected based on the results of calculations of the permeability of the pipeline. When choosing steel, copper, or polymer products, you should pay close attention to the markings - some types are designated by the internal diameter, and some by the external diameter. In the marking of polymer pipes, only the outer diameters are indicated.

How to choose the right line size

We select the internal diameter of polypropylene pipes by basic calculation with the initial data:

speed of fluid movement along the line;
water consumption.

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

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

π – Pi number equal to 3.14.

In practice, the default diameter of pipes for the water supply of a private house is 20 mm. For a multi-storey building, at each stage of construction, different diameters of polypropylene pipes are used based on a refined calculation: to supply water to each apartment, to each entrance, to a house, block, microdistrict, different parameters of highways are used. Accordingly, the higher the water consumption, the larger the dimensions taken.

In practice in apartment buildings The following dimensions of polypropylene pipes in mm are used:

for risers of 5-storey buildings Ø25 mm;
indoor wiring – the diameter is taken to be 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 to organize the supply of water, heating, sewerage to houses, residential neighborhoods, public buildings, sports complexes, hotels, for industrial needs. For example, water supply pipes with a diameter of 500 mm or more are used to supply cold drinking water from storage basins to metropolitan areas. Large PP pipes are not used to transfer coolant due to the high thermal load, which contributes to the softening of polymer lines.

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

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

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

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

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 applications. Along with metal-plastic pipes, even a person without professional training can lay an internal water supply or heating system from polypropylene pipes. It is enough to obtain the necessary minimum knowledge so that the quality and appearance of the pipelines in your home, bathhouse or other individual buildings meet the highest requirements.

Properties of polypropylene pipes for water supply

Recently, installation polypropylene water pipes became widespread in construction 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 growth, 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:

Made of 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);
Made from random copolymer – PP-R (PP-R and PP type 3).

According to GOST R 52134 -2003, which regulates 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. Standards from 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 system, the following classes of polypropylene pipes are produced:

Operating temperature max, ˚C

According to their structure, polypropylene pipes are produced either from solid material or 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 supply sources, while reinforced ones can be used in all systems, including radiator heating.

Compared to solid pipes, reinforced pipes have significantly lower thermal elongation. So, for fiberglass-reinforced pipes it is two times less, and for aluminum – four times. 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 closed-type heating with long pipelines, when the amount of oxygen in the water can reach such a value that it will harm plumbing equipment.

As a rule, the pipe marking should contain the internal stress value 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 polypropylene pipe is called minimum long-term strength and is designated as MRS (Minimum Required Strength). The higher this indicator, the stronger pipe. Therefore, it is necessary to take into account that an incorrectly selected pipe may not withstand the guaranteed service life.

Selection and use of polypropylene pipes for water supply

Scope of application of polypropylene pipes in individual houses, bathhouses and outbuildings is extensive - from hot and cold water supply to the arrangement of radiator and underfloor heating systems. With their help you can connect to pipelines from various materials: steel, copper and metal-plastic. Their long service life allows them to be installed with confidence in both open and closed systems.

How to choose the right polypropylene pipes

However, it is important to make the right choice from the extensive range of pipes offered by many manufacturers. Here are a few criteria to follow when purchasing them:

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

smoothness of the internal and external surfaces;
the presence of cracks, chips, bubbles, heterogeneity of structure, foreign inclusions;
correct geometric shape along 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 defects in the work done.
If you plan to supply drinking water, then it would be useful to familiarize yourself with the quality certificate for the pipe’s compliance with sanitary and hygienic standards.
To avoid any additional difficulties when installation work ah, choose only straight pipes. In stores they are often stored in a vertical position, which leads to bending, sometimes quite significant.
Buy pipes only from well-known manufacturers who have proven themselves with the best side and providing certificates of compliance with the declared quality. For example, domestic “Sinicon”, “FD Plast”, “Valtec” and “Ikaplast” or foreign “Ostendorf”, “Valsir”, “Firat”.

Range of polypropylene pipes, mm

Note: PN25 pipe is made with a reinforcing aluminum layer, which can be a simple or perforated layer with through holes. The perforated layer ensures a reliable connection of all layers without the use of glue. The aluminum layer can be located either offset to the outer surface of the pipe, or symmetrically relative 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 choosing exactly polypropylene pipes for all pipeline systems.

There was a time when I used copper, steel, and metal-plastic pipes. Until I found out about polypropylene ones, and installed them in my bathhouse and home for heating, cold and hot water. Not a single marriage in connections! The work is clean, fast, reliable, “no noise and dust”, in a word, pleasant in all respects. The cost of fittings and pipes themselves, compared to other types, is ridiculous. There is no need for pipe benders, gas welding, propane, or other expensive tools and materials.

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

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 applications.

Polypropylene pipes. Types and technical characteristics

Not everyone knows that currently there are many types of polypropylene pipes, differing in technical characteristics, quality, purpose and color. But these products are increasingly used for arranging in-house water supply networks, and have practically replaced their steel counterparts. On their basis, it is possible to create engineering communications with an increased temperature of the working environment - hot water supply and heating systems.

Today, many types of polypropylene pipes are produced for use in the most different areas

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 standardized classification of polypropylene pipes that exists today divides such products into 4 groups. Their designation contains the Latin letters PN and two numbers. This number reflects the pressure that polypropylene pipes are designed for.

PN 10. Systems assembled on the basis of products of this http://trubamaster.ru/vodoprovodnye/prokladka-polipropilenovyx-trub.htmlgroup can withstand pressures of up to 10 atmospheres. The answer to the question regarding the maximum temperature of the working environment is clear: + 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 the thin walls. “Thanks to” such technical characteristics, polypropylene pipes of the PN10 group have not found widespread use for laying pipelines in apartments.

PN16 . Polypropylene pipes, designated by this sequence of symbols, can withstand pressures of up to 16 atmospheres; they can transport liquid with a temperature of +60˚C. These polypropylene pipes can be chosen exclusively for “cold” mains. In addition, they are characterized by a fairly high coefficient of temperature deformation, which is unacceptable in pressure pipelines for heating and hot water supply.

The type and purpose of the pipe can be determined by the markings on its surface

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

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

PN25. These are already full-fledged polypropylene heating pipes. The coolant temperature can reach +95˚С. The answer to the question of what pressure a PN25 type polypropylene pipe holds is clear - 25 atmospheres. The raw material for their manufacture is a composite material with reinforcing inserts. These can be nylon fiber or aluminum foil. Both types of interlayer not only improve the strength characteristics of polypropylene pipes, but also reduce temperature deformation. Even when transporting water with extreme permissible temperature under high pressure their linear dimensions will not change. Therefore, reinforced products are widely used in pressure pipelines. Another important factor: compared to thick-walled pipe made of polypropylene, installed in similar pipelines, 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 polypropylene pipes, which made it one of the most popular types of building materials, are due to amazing properties this polymer.

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

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

service life is about 50 years. And when used only in cold water supply, according to manufacturers, it is all 100;
prevent the formation of solid deposits. This characteristic of polypropylene pipes is due to the use of a special technology for processing the internal surface at the production stage;
sound insulation. 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 doing this for the first time, you should listen to the advice of professionals. In particular, pay special attention to the heating time of polypropylene pipes when connecting them by welding;
do not require additional maintenance;
resistant to chemically aggressive acid-base compounds;
high elasticity;
affordable price. You can choose such products in any price range.

Not the least role in the high demand, taking into account 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

The advantages of polypropylene pipes were indicated above. But, as always, there are some downsides here too. The main ones are:

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

Advice! Taking into account 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 at small intervals.

How to choose polypropylene pipes

For correct selection For these products, there are five points to take into account. The marking 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.

Regular home plumbing can be assembled from small diameter pipes

Diameter. It must be selected taking into account the technical characteristics of the pipeline system being created. The best polypropylene pipes for residential wiring are considered to be 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, large-diameter polypropylene pipe is used for a main pipeline installed in the basement of an apartment building.

Maximum permissible pressure. If we talk about household use, then almost all types of pipes are suitable, including PN10 brand products. Let's look at how their service life is related to pressure and temperature using this pipe as an example.

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 pressure not exceeding;
water temperature 70˚С. The service life will be equal to that declared by the manufacturer at pressure;
the water temperature remains 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 high temperatures of the transported liquid. The changes concern the thickness of their walls. And this is critical for such a parameter as pipeline throughput.

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

Important! The characteristic of polypropylene pipes “Linear expansion coefficient” 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.

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

Range of polypropylene pipes

This segment of the global 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 for creating cold water supply systems, industrial pipelines, as well as ventilation systems;
PPB. This type of rolled pipe product range is made from a complex polypropylene block copolymer. These products are used in cold water and heating pressure systems. But they are used not only as pressure pipes made of polypropylene. High-strength impact connecting elements are made from them;
PPR. Random copolymer polypropylene is used for production. Based on this type of pipe, systems of both hot and cold water supply are created, including water heated floors;
PPs. This separate species assortment of rolled pipes. A highly flammable, highly durable polymer is used as a raw material for its production. The maximum operating temperature of polypropylene pipes type PPs is +95˚С. According to experts, this is the best option for a single-layer (non-reinforced) product for heating systems.

Color of polypropylene pipes

The range of polypropylene pipe products is presented in four colors. They come in white, grey, black and green. Various utilities are installed on the basis of white or gray polypropylene pipes, ranging from water supply 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 using them outdoors, since such products are characterized by low frost resistance. Already at a temperature of 0˚C, the type of polypropylene used for their manufacture begins to crystallize.

Helpful information! White pipes can withstand pressure of 25 bar! At the same time, gray polypropylene pipes have better tolerance to thermal loads.

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 a regular soldering iron.

From the existing range of these products, it is recommended to use black polypropylene pipes to create sewerage systems, as well as drainage systems. Additives added to raw materials at the production stage increase their technical capabilities. Among the advantages of plastic black pipes it is worth highlighting:

resistance to various aggressive environments;
non-exposure to UV radiation;
high strength;
The service life declared by the manufacturer is fully met.

Currently, many owners of suburban areas are 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 large-diameter products are used for the construction of drainage systems, sewerage systems, drainage of rainfall (stormwater) and groundwater (drainage).

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

The maximum temperature expected for a polypropylene corrugated pipe is about +60˚С, and for short-term drains up to +100˚С, which is rare. Pipelines created on the basis of these products are laid trenchless and in 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 polypropylene pipes. Among their advantages it is worth highlighting:

high ring stiffness;
chemical and corrosion resistance;
resist the effects of stray currents. Dielectric properties distinguish these products from their 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 water abrasive wear;
long service life.

Features of welding polypropylene pipes

To weld products of this type, the thermal polyfusion method is used. It consists in heating the parts to be welded and then quickly connecting them. This procedure is performed using a special soldering iron. Some manufacturers of such tools equip them with two heating elements at once, the power of which is sufficient to heat pipes of a specific diameter. It would seem that this is a plus. But not in this case.

For high-quality pipe connection using the thermal diffusion method, you will need special equipment and strict adherence to welding technology

Important! Heating by two elements at the same time 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 one fails.

Heating time depends on:

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

The material after heating retains its plasticity very a short time. In a few seconds you need to have time to fix the connection, while simultaneously getting rid of distortions. Optimal temperature for warming up the mark is considered to be +260˚С. To ensure a reliable connection, the pipe material must be heated quite strongly. But excessive heat may cause loss of shape. Therefore, the execution time of this operation should be monitored. Depending on the cross-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 millimeters, etc.

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

during operation, the welding machine must be turned on at all times;
mandatory application of markings to the surface of the pipe in order to ensure the proper depth of the weld seam.
The elements being connected must be heated simultaneously.

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 allows you to avoid purchasing and installing thermal insulation. At the same time, heat savings during coolant transportation are about 20%. That is, gas consumption in autonomous system heating can also be reduced.

Polypropylene pipes technical characteristics

Polypropylene pipes technical characteristics. Marking of polypropylene pipes. Advantages and disadvantages. How to choose polypropylene pipes. Range of polypropylene pipes.

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

Features of marking polypropylene pipes

In order to correctly select the types and characteristics of PP pipes, you need to pay attention to their markings. First of all, you need to pay attention to the designations that characterize the operating pressure and temperature of pipe products. The standardization system in force today classifies polypropylene pipes into 4 groups:

PN10 - polypropylene pipes designed for a working pressure of 10 atmospheres and operating temperature up to +45 °C. Such products have thin walls and can only be used for transporting cold liquids;
PN16 - PP pipes, designed for operating pressure up to 16 atmospheres and operating temperature up to +60 °C. Not intended for hot water supply and heating systems;
PN20 - polypropylene pipes designed for operating pressure up to 20 atmospheres and operating 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 operating pressure up to 25 atmospheres and operating temperature up to 95 °C. Polypropylene pipes PN 25 are available in reinforced versions. 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 supply 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 decide on 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 polypropylene pipes 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 linear expansion coefficient. This can lead to deformation of the pipelines and their release from the fastenings, which is often accompanied by depressurization at the joints and causes leaks. In this regard, it is recommended to use reinforced PP pipes, whose coefficient of thermal expansion is significantly lower. However, reinforcement does not completely eliminate temperature deformation, so the installation technology involves installing fastening points and compensators at certain intervals.

Another disadvantage is that polypropylene pipes are not subject to deformation during installation. Therefore, special fittings must be used to make turns. In addition, when performing installation work and placing pipelines, it is important to consider negative impact solar radiation, which can cause accelerated aging of the material.

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

Features of choosing polypropylene pipes

When choosing polypropylene pipes, four main parameters must be taken into account:

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

The values of these parameters must be correlated with the purpose and operating conditions of the pipelines being installed.

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

For household systems Pipes with almost any operating pressure can be used. However, the value of this parameter, especially in combination with temperature, directly determines the service life of the products. That is why, for operation as part of a heating system, it is necessary to select pipes designed for the highest operating 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 installing risers. Internal wiring used using a 20 mm polypropylene pipe. 25 mm polypropylene pipes can also be used for the same purpose.

The coefficient of linear expansion is an important parameter that 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. Thus, 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 heated can lead to 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 and outside walls.

Range 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. Has 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. It is highly elastic and has sufficient temperature resistance. Thanks to this, PPB pipes can be used for installing heated floors. They are also used in water supply networks, ventilation systems, industrial pipelines;
PPR (PPCR) is a random copolymer of polypropylene, the molecular chain of which contains 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. Fire-resistant polypropylene homopolymer. The most suitable material for the production of heating system pipes. 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 the 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. Restrictions on the use of pipes white is their low frost resistance, which does not allow their use 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;
easy installation by soldering.

Black polypropylene pipes are used for 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 most cheap look products. They are used in private homes and cottages for irrigation systems.

Corrugated polypropylene pipes

A special variety are corrugated pipes made of polypropylene. They are used to create sewerage, drainage, 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 polypropylene pipes are produced. They have the following advantages:

high chemical resistance;
increased level of ring stiffness;
excellent dielectric properties;
maintaining high bandwidth during the entire service life;
high resistance to abrasive wear;
long service life.

Features of installation of polypropylene pipes

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

When soldering polypropylene pipes, it is very important to comply with 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 unit, while ensuring the correct location of the mating parts. It is also important to avoid excessive heat, which can cause the pipes to warp.

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 required to fix the connection. If this requirement is violated, deformation of the connection may occur, which will lead to its depressurization.

Sale of polypropylene pipes

The Lammin brand 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.

Classification of polypropylene pipes according to the composition of raw materials

PPR (PPRC, PPR) - products of this type are made from a static copolymer of polypropylene foam (or random copolymer) with a crystalline molecular structure. They are resistant to temperature fluctuations from -170 to +1400C and shock loads, therefore they are widely used for sewerage, water supply and heating installations. They are considered the most popular material for household construction. The sizes are in the range of 16...110 mm and are subclassified 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, fire retardants, nucleators, which give increased impact strength to the polymer. Products of this type are used for external cold water supply, ventilation and drainage. They are not suitable for heating systems because they have a low melting point. The diameters of polypropylene pipes RPH, as a rule, are large, since they are most often used in the installation of industrial sewerage and drainage.
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 final product of this type, due to its molecular structure, acquires increased impact resistance and is used for underfloor heating systems and cold water supply.
PPs (polyphenyl sulfide) is a high-class polymer with a special molecular structure. It has increased resistance to loads and heat, improved wear resistance and strength. The diameter of polypropylene pipes of this type is from 20 to 1200 mm. Scope of application: ventilation, hot and 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 evaluate the resistance of the material to the pressure of the liquid passing through the line.
Yulia Petrichenko, expert

The following types of polypropylene pipes are distinguished:

N10 (РN10) – with a working pressure on the wall of 1.0 MPa and a polymer thickness from 1.9 to 10 mm. Used for arranging heated floors, cold water supply with heating up to +45 degrees. Diameter of polypropylene pipes of this type: external – 20…110 mm, internal – 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 (РN20) – 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. Version: outer diameter - 16...110 mm, inner diameter - 10.6...73.2 mm.
N25 (РN25) – polypropylene pipe with a working pressure on the wall of 2.5 MPa and reinforcement with aluminum foil. Ideal for heating systems and hot water supply with coolant temperatures up to +95 degrees. Thanks to the multilayer structure, products of this type have increased resistance to shock and thermal loads. Execution: internal diameter of polypropylene pipes РN25 – 13.2…50 mm, external diameter – 21.2…77.9 mm.

What determines the dimensions 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 water pipes	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 internal diameter of polypropylene pipes by basic calculation with the initial data:

speed of fluid movement along the line;
water consumption.

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

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

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

for risers of 5-storey buildings Ø25 mm;
indoor wiring – the diameter is taken to be 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 to organize the supply of water, heating, and sewerage to houses, residential neighborhoods, public buildings, sports complexes, hotels, and for industrial needs. For example, water supply pipes with a diameter of 500 mm or more are used to supply cold drinking water from storage pools to metropolitan areas. Large PP pipes are not used to transfer coolant due to the high thermal load, which contributes to the softening of polymer lines.

The diameters of the range of polypropylene pipes are given 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 drains of industrial buildings, polypropylene pipes are used, the dimensions of which exceed Ø400 mm.

To independently install heating, water supply and sewerage systems in a private house or apartment, it is important not only to select the correct sizes of lines, 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 deal with the design of communications and their installation.

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 us to implement complex construction projects, perform hot water supply, hot water supply and heating piping aesthetically, quickly, and reliably.

How do you cope with replacing old steel pipes with polypropylene ones? What size highways do you use when installing intra-house communications?

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