Polypropylene pipes: technical specifications, application

What are polypropylene pipes? What are their scope, technical characteristics, what does their marking mean? In this article we will try to understand all these issues. And to understand why this type of pipe structures is truly considered to be unique materials, without which today it is impossible to imagine the installation or repair of water supply, heating or sewer communications.

Polypropylene pipe - what is it?

Polypropylene is a type of thermoplastic polymer. It is made by combining (polymerizing) molecules of an ethylene gas derivative. The international designation of polypropylene "PP". Next, we consider in more detail polypropylene pipes: technical characteristics, properties and manufacturing technology of this new generation material.

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

The main properties of polypropylene pipes and their GOST

Modern polypropylene pipes, the technical characteristics and properties of which can be seen in the table, have reliability, durability and are quite affordable. The main and undeniable advantage is the fact that they are not susceptible to corrosion processes, resistant to temperature conditions, easy to install, made of environmentally friendly materials. The main properties according to GOST are presented below.

GOST	Parameter	Indicator
DIN52612	Thermal conductivity, at +20 0	0.24 W / cm
15139	Density	0.9 g / cm 3
23630	Heat capacity at +20 0 (specific)	2 kJ / kgf
21553	Melting	+149 0
11262	Tensile strength (at break)	34 ÷ 35 N / mm 2
18599	Elongation of yield strength	fifty%
11262	Yield strength (tensile)	24 ÷ 25 N / mm 2
15173	Expansion coefficient	0.15 mm

A kind of polypropylene pipe. Scope of application

The latest technologies for the production of plastic products are polypropylene pipes. Specifications are presented below.

• PN10 - thin pipe. The service life is approximately 50 years. It is applied at installation of cold water supply, a heat-insulated floor (the temperature of the heat carrier should not exceed + 45 ⁰ C). Standard sizes: Ø outside 20 ÷ 110 mm, Ø inside 16.2 ÷ 90 mm, pipe wall thickness 1.9 ÷ 10 mm. Nominal pressure - 1 MPa.

• PN20 - this type of pipe is used in cold water supply systems in residential or industrial buildings or hot (up to +80 ⁰ ). The service life is 25 years. Nominal pressure - 2 MPa. Dimensions: Ø outer 16 ÷ 110 mm, Ø inner 10.6 ÷ 73.2 mm, pipe wall thickness 16 ÷ 18.4 mm.
• PN25 - polypropylene pipe reinforced with aluminum film or fiberglass. In its properties it is identical to metal-plastic. The service life depends on the pressure inside it and the temperature media. It is used in the installation of heating systems and hot water supply. Nominal pressure - 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 are the undeniable advantages of polypropylene pipes? The technical characteristics of polypropylene, according to manufacturers, are truly amazing. It is considered a universal building material for the installation and reconstruction of utilities in residential and industrial complexes. They have successfully passed tests in independent European and world laboratories and have confirming certificates of quality. Consider the merits.

• Their main advantage is a long service life of about 50 years, and when used in a cold water supply system, they can serve up to 100 years.
• Thanks to the specially designed inner surface of the pipe, which is constantly in contact with water, no deposits are formed on their surfaces.
• Soundproofing. Noises may occur when transporting hot water from the coolant or with a simple stream of water. Polypropylene is able to absorb them.
• No condensation. PPR polypropylene pipe is resistant to temperature changes due to low thermal conductivity.
• Light weight. Compared to their metal counterpart, they are 9 times lighter.
• Easy to install.
• No additional maintenance needed.
• Resistance to exposure to acid-base substances.
• The elasticity of the polypropylene pipe is very high.
• Affordable price.

Product data sheet pn25

Not so long ago, polypropylene pn25 pipe was developed and mass-produced by manufacturers. Its technical characteristics are described in detail in the product passport.

No.	Feature Name	Values ​​for polypropylene pipes: dimensions
		20 ÷ 3.4	25 ÷ 4.2	32 ÷ 5,4	40 ÷ 6.7	50 ÷ 8.3	63 ÷ 10.5
one	Inner 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 / kg 0 C
3	Ø Tolerance	+ 0.3mm	+ 0.3mm	+ 0.3mm	+ 0.4mm	+ 0.5mm	+ 0.6mm
four	Linear expansion, ( 1/0 )	3,5 ÷ 10 -5
5	Heating time during welding	5 sec	7 sec	8 sec	12 sec	18 sec	24 sec
6	Roughness Coefficient (Equivalent)	0.015 mm
7	Cooling Time (seconds)	120 sec	120 sec	120 sec	240 sec	250 sec	360 sec
8	Tensile strength	35 MPa
9	Regulatory Series	S2.5
10	Elongation from the gap (relative)	350%
eleven	Weight (kg / meter linear)	0.175	0.272	0.446	0.693	1,075	1,712
12	Tensile Strength	30 MPa
13	Melt Flow (Index) PPR	0.25 g / 10 min
fourteen	Thermal conductivity	0.15 W m / 0 C
fifteen	Heating time during welding	5 sec	7 sec	8 sec	12 sec	18 sec	24 sec
16	PPR modulus	900 MPa
17	Pipe socket depth (minimum) when welding	14 mm	15 mm	17 mm	1 8 mm	20 mm	24 mm
eighteen	Pipe Density (Equivalent)	0.989 g / m 3
19	Volume (internal) running meter / l	0.137	0.217	0.353	0.556	0.876	1,385
twenty	PPR + fiber modulus	1200MPa
21	Size Ratio (Standard)	6sdr
22	PPR Density	0.91 g / m 3
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

A novelty in the metal-plastic industry with high quality and properties is a polypropylene pipe pn25. Specifications are detailed in the table above. It was she who was able to solve the problem with a high coefficient of thermal expansion of plastic pipe products. This makes it possible to use it in the drinking water supply system, hot water supply, installation of heating and other utilities. And also for transporting other liquids or gases that are not aggressive with respect to the materials from which they are made.

Design features

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

What is the reinforcement of polypropylene pipes. Types of reinforcement

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

Fiberglass reinforcement

Fiberglass reinforcement is a three-layer pipe construction: two layers of polypropylene (internal and external) and a layer of fiberglass. Marked as PPR-FB-PPR. Such an abbreviation in the marking confirms the monolithic structure and fiberglass reinforcement. During installation, these products do not need calibration or stripping; experts recommend installing more additional fasteners during installation.

Aluminum reinforcement

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

Polypropylene and its use in the sewer system

So, we found out that polypropylene as a pipe material is highly resistant to aggressive alkaline and chemical substances. Therefore, to the question "what is the best choice of pipes for utilities?" The answer is clear - modern polypropylene sewer pipes. Specifications: stability, strength and durability. In addition to resistance to the effects of aggressive substances on them, and there are a lot of such in the drains, they will also last for a rather long period. They are not influenced by corrosion processes in comparison with metal pipes. The length of the pipe for the sewer 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 scope in the sewage system is quite wide. They are interconnected by diffuse welding or using special fittings.

Valtec polypropylene pipes

Today there are many offers from manufacturers of these products for buyers of our country. And when choosing materials for laying engineering systems, it is sometimes quite 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 even then, if a person is incompetent in the issue of pipe production, then he is unlikely to understand the characteristics either. This is especially true of new firms that have appeared on the sales market recently.

Italian manufacturers of Valtec present their new Valtec polypropylene pipes to the customer. Specifications: excellent quality, new manufacturing methods, durability and reliability. Moreover, this company is not the first year occupies a leading position in the sales market. Its products have always been and are in demand. The quality is high due to the fact that the company keeps up with the development of new technologies and implements them in its production. Manufacturers give a 7 year warranty on goods.

The price of the entire range of products is quite affordable. Always available are integral polypropylene pipes, integral for cold water supply systems and composite, reinforced with fiberglass or aluminum, with a cross-section diameter of 20 ÷ 90 mm. Employees of the company very carefully monitor the quality of products, so errors or deviations from the standards are completely eliminated. Available in special tubes up to 4 meters marked, with accompanying documentation and certificates.

PPRC pipes

These are pipes made of high temperature polypropylene. Available with a cross-sectional diameter of 20 ÷ 160 mm. Reinforced with fiberglass or aluminum. Their main difference is small indicators of thermal 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 corrosion processes;
• resistance to aggressive substances;
• high strength;
• resistance to bending more than once;
• environmentally friendly material;
• simplicity in installation;
• affordable price;
• long service life.

Use of polypropylene in a water supply system

Plastic pipe products quickly entered the list of popular building materials, polypropylene water pipes became an exception. Specifications, advantages and disadvantages are presented below.

Advantages:

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

Disadvantages:

• do not withstand temperatures above 100 ⁰ C;
• lack of repair or repair;
• welding work is needed.

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

Classification of polypropylene pipes

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

• PPB - marking means that these are pipes with increased mechanical strength, polypropylene pipes are used for heating. Characteristics: reinforced (fiberglass or aluminum foil), strong, durable, affordable.
• PPH - marking products with large diameters. They are used in ventilation systems or in cold water supply systems.
• PPR is the most popular and versatile brand. Its universality lies in the fact that it is able to tolerate high temperatures of the water flow. It is used in 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.