Polypropylene pipes: technical characteristics, application

What are polypropylene pipes? What is the scope of their application, technical characteristics, what does their labeling mean? In this article we will try to understand all these issues. And to understand, thanks to which this kind of pipe constructions is truly considered to be unique materials, without which it is impossible to imagine the installation or repair of water supply, heating or sewerage communications.

Polypropylene pipe - what is it?

Polypropylene is a kind of thermoplasticpolymer. It is made by the method of combining (polymerization) molecules of a derivative gas of ethylene. International designation of polypropylene "PP". Further we will consider in more detail polypropylene pipes: technical characteristics, properties and technology of manufacturing of this material of new generation.

Having a unique resistance to the impact onits alkaline solvents and aggressive substances, the material is widely used in the installation of heating systems, water pipes and sanitary facilities. Can withstand low temperature conditions (up to -10 degrees) or high (up to +110 degrees).

Basic properties of polypropylene pipes and their GOST

Modern polypropylene pipes, technicalcharacteristics and properties of which can be seen in the table, are reliable, durable and quite affordable. The main and indisputable advantage is the fact that they are not subject to corrosive processes, they are resistant to temperature conditions, easy to install, made of environmentally friendly materials. The main properties according to GOST are presented below.

GOST	Parameter	Index
DIN52612	Thermal conductivity, at +200FROM	0.24 W / cm
15139	Density	0.9 g / cm3
23630	Specific heat at +200C (specific)	2 kJ / kgf
21553	Melting	+1490FROM
11262	Strength (at break)	34 ÷ 35 N / mm2
18599	Elongation of yield stress	50%
11262	Yield strength (tensile)	24 ÷ 25 N / mm2
15173	Coefficient of expansion	0.15 mm

Variety of polypropylene pipe. Scope of application

The newest technologies for the production of plastic products are polypropylene pipes. Technical characteristics are presented below.

• PN10 is a thin tube. The service life is approximately 50 years. It is used for installation of cold water supply, warm floor (the temperature of the coolant should not exceed + 45⁰FROM). Standard dimensions: Ø outside 20 ÷ 110 mm, Ø inside 16.2 ÷ 90 mm, pipe wall thickness 1.9 ÷ 10 mm. The nominal pressure is 1 MPa.

• PN20 - this type of pipe is used in cold water supply systems in residential or industrial buildings or hot (up to +80⁰FROM). The service life is 25 years. The nominal pressure is 2 MPa. Dimensions: Ø outer 16 ÷ 110 mm, inner Ø 10.6 ÷ 73.2 mm, wall thickness 16 ÷ 18.4 mm.
• PN25 - reinforced with aluminum foil orfiberglass polypropylene tube. In its properties is identical to metal-plastic. The service life depends on the pressure inside it and the temperature carriers. It is used for installation of heating and hot water supply systems. The nominal pressure is 2.5 MPa. Dimensions: Ø outside 21,2 ÷ 77,9 mm, Ø inside 13,2 ÷ 50 mm, pipe wall thickness 4 ÷ 13,4 mm

The main advantages of polypropylene pipes

What indisputable advantages are the pipespolypropylene? Technical characteristics of polypropylene, according to the manufacturers, are truly amazing. It is considered a universal building material for installation and reconstruction of engineering communications in residential and industrial complexes. They successfully passed tests in independent European and world laboratories and have confirmatory certificates of quality. Consider the advantages.

• Their main advantage is a long service life - about 50 years, and when used in a cold water supply system can serve up to 100 years.
• Due to the specially designed internal surface of the pipe, which is constantly in contact with water, no deposits on their surfaces are formed.
• Soundproofing. Noise may occur when transporting hot water from the coolant or with a simple flow of water. Polypropylene is able to absorb them.
• Absence of condensation. Polypropylene PPR pipe is resistant to temperature changes due to low thermal conductivity.
• Light weight. Compared with their analogue of metal, they are 9 times lighter.
• Ease of installation.
• In the additional service do not need.
• Resistance to the influence of acid-base substances on them.
• The elasticity of the polypropylene pipe is very high.
• Affordable price.

Product data sheet pn25

Not so long ago the producers developed and produced a mass production polypropylene pipe pn25. Technical characteristics of it are described in detail in the product passport.

No.	Name of the characteristic	Values ​​for polypropylene pipes: dimensions
		20 ÷ 3,4	25 ÷ 4,2	32 ÷ 5.4	40 ÷ 6,7	50 ÷ 8,3	63 ÷ 10.5
1	Internal Ø	13.2 mm	16.6 mm	21.2 mm	26.6 mm	33.4 mm	42.0 mm
2	Specific heat	1.75 kJ / kg0FROM
3	Ø tolerance	+ 0.3mm	+ 0.3mm	+ 0.3mm	+ 0.4mm	+ 0.5mm	+ 0.6mm
4	The linear extension, (1 /0FROM)	3,5 ÷ 10-5
5	Warm-up time during welding	5 sec	7 sec	8 sec	12 seconds	18 sec	24 seconds
6	Coefficient of roughness (equivalent)	0.015 mm
7	Cooling time, (seconds)	120 sec	120 sec	120 sec	240 sec	250 seconds	360 sec
8	Tensile strength	35 MPa
9	Regulatory series	S2.5
10	Elongation from rupture (relative)	350%
11	Weight (kg / meter linear)	0,175	0,272	0,446	0,693	1,075	1,712
12	Yield strength to tension	30 MPa
13	Melt flow (index) PPR	0.25 g / 10 min
14	Thermal conductivity	0.15 W m /0FROM
15	Warm-up time during welding	5 sec	7 sec	8 sec	12 seconds	18 sec	24 seconds
16	The elastic layer modulus PPR	900 MPa
17	The depth of the socket for the pipe (the minimum) for welding	14 mm	15 mm	17 mm	1 8 mm	20 mm	24 mm
18	Pipe Density (equivalent)	0.989 g / m3
19	Volume (internal) meter per linear / l	0,137	0,217	0,353	0,556	0,876	1,385
20	Module elasticity layer PPR + fiber	1200MPa
21	Dimension ratio (standard)	6SDR
22	Density of PPR	0.91 g / m3
23	Pressure (nominal), PN	25 bar	25 bar	25 bar	25 bar	25 bar	25 bar
24	Welding time	4 sec	4 sec	6 sec	6 sec	6 sec	8 sec

Novelty in the metal-plastic industry with a highquality and properties - polypropylene pipe pn25. Technical specifications are detailed in the table above. It was she who was able to solve the problem with a high coefficient of heat expansion of tubular plastic products. This makes it possible to use it in the system of drinking water supply, hot water supply, heating installation and other utilities. And also for the transport of other liquids or gases that are not aggressive towards the materials from which they are made.

Design Features

Layers on the inner and outer sides are madeof special polypropylene brand PPR100. In it, the percentage of fibrous fiber is at least 12%. The inner layer is made of the same material, but the content of the fiber is increased to 70%, as well as the content of the red dye. The presence of fiberglass fiber in the pipe reduces the level of deformation from the temperature effects, but, unfortunately, can not cope with oxygen diffusion.

What is the reinforcement of polypropylene pipes. Types of reinforcement

Consider universal polypropylene pipesreinforced, their technical characteristics, types of reinforcement, where they are used. Special reinforcement makes it possible to use in the heating system or hot water supply. In addition, they are not only known for a long operational period, but also high quality and efficiency. To date, there are two methods of reinforcing this type of product: fiberglass and aluminum. Let's consider each of them separately.

Glass Fiber Reinforcement

Reinforcement with fiberglass isthree-layer pipe construction: two layers of polypropylene (inner and outer) and a layer of fiberglass. It is marked as PPR-FB-PPR. Such an abbreviation in the marking confirms the monolithic structure and reinforcement with fiberglass. During installation, this product does not need to be calibrated or stripped, experts recommend installing more additional fasteners during installation.

Aluminum reinforcement

Pipe products with such reinforcement arematerial for the installation of heating systems or hot water supply with a high level of rigidity of structures. They are identical in strength to metal analogues with thin walls. On their surface, PPR-AL-PPR marking must be present. They are reinforced with two layers of aluminum: the first is perforated with small holes, and the second is solid and solid throughout the surface of the pipe structure. When installing a heating pipe, it needs to clean the aluminum layer, only the polypropylene layer is soldered. If the technology is correctly implemented, then the mounted system will work for many years without problems.

Polypropylene and its use in the sewage system

So, we found out that polypropylene is like a pipethe material is highly resistant to corrosive alkali and chemicals. Therefore, the question "which is better to choose pipes for engineering communications?" the answer is unambiguous - modern sewer pipes are polypropylene. Technical characteristics: stability, strength and durability. In addition to resistance to the influence of aggressive substances on them, and there are a lot of such in drains, they will also last a fairly long period. They are not affected by corrosive processes in comparison with metal pipes. The length of the pipe for the sewage system is about 4 meters, the diameter of the polypropylene pipes (technical specifications contain such information) are from 16 mm to 125 mm. That is, their area of ​​application in the sewage system is quite wide. They are connected with each other by diffusion welding or by means of special fittings.

Valtec pipes made of polypropylene

Today, there are many proposals fromcompanies-producers of this product for buyers of our country. And when choosing the material for the laying of engineering systems, it is sometimes difficult to make a choice in favor of one of them. In appearance, they are exactly the same, but differ only in manufacturing technology. And then, if a person is incompetent in the issue of pipe production, then he is unlikely to understand the characteristics either. This is particularly true for new firms that have recently appeared in the sales market.

Italian manufacturers of "Valtek" representthe buyer of his new polypropylene pipes Valtec. Technical characteristics: excellent quality, new manufacturing methods, durability and reliability. Moreover, this company has been in the forefront of the sales market for several years. Its products have always enjoyed and are in demand. Quality is high due to the fact that the company keeps up with the development of new technologies and introduces them into its production. For the product manufacturers give 7 years warranty.

The price for the entire range of products is quite affordable.In the presence there are always solid ones for cold water supply systems and composite polypropylene pipes reinforced with fiberglass or aluminum with a diameter of 20 ÷ 90 mm. Employees of the company closely monitor the quality of products, so errors or deviations from the standards are completely excluded. It is produced in special tubes up to 4 meters with marked markings, with accompanying documentation and certificates.

PPRC pipes

These are pipes made of high-temperaturepolypropylene. They are produced with a diameter of 20 ÷ 160 mm. Reinforced with fiberglass or aluminum. The main difference between them are small indicators of temperature expansion, low pressure loss. The production technology fully complies with GOST and the requirements of foreign standards. What are polypropylene pprc pipes? Technical characteristics, properties and advantages of a plastic product:

• low thermal conductivity;
• high level of sound insulation;
• resistance to corrosive processes;
• resistance to the influence of aggressive substances on them;
• high strength;
• resistance to bending more than once;
• environmentally friendly material;
• simplicity in installation;
• affordable price;
• long service life.

Use of polypropylene in the water supply system

Plastic tube products with rapidat a pace entered the list of sought-after building materials, polypropylene water pipes are no exception. Technical characteristics, advantages and disadvantages are presented below.

Pluses:

• resistant to corrosion;
• service life - from 50 years;
• zero conductivity, hygiene;
• ease of installation;
• do not require additional care;
• affordable price;
• the ability to withstand a pressure of about 20 bar;
• excellent thermal insulation.

Disadvantages:

• do not stand a temperature of more than 100⁰FROM;
• no repair or repair;
• Welding is necessary.

Produced in different colors: gray, green, black and white. The color of the pipe does not depend on the properties and quality, except black. It has the ability to protect it from ultraviolet radiation. For the installation of a water pipe system, pipes with a diameter of 16 ÷ 110 mm are used. For cold water supply pipes with PPH homopolymer or PPB block copolymer are suitable. For the supply of hot water or heating, pipes marked PEX-AL-PEX are used. They are reinforced with either fiberglass or aluminum.

Classification of polypropylene pipes

All products of tubular products from polypropylene are classified in a certain way.

• PPB - marking means that it is pipes withmechanical strength of the raised level, polypropylene pipes for heating are used. Product specifications: reinforced (fiberglass or aluminum foil), durable, durable, affordable.
• PPH - marking of products having large diameters. Used in ventilation systems or in cold water systems.
• PPR is the most popular and universal brand. Its versatility lies in the fact that it is able to withstand high temperatures of the water flow. It is used in the system of hot water supply and heating systems.

All these three brands differ from each other only in the type of plastic used in the manufacture. They contain special additives that make them more elastic and durable.

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