Advertising on the portal

Help in the selection and table of diameters of polypropylene pipes

When designing a heating system or supplying hot or cold water for a country house, many, without hesitation, give preference.

And this is not surprising, because polypropylene pipes are a high-quality and modern building material, distinguished by reliability, durability, ease of installation, pleasant appearance and reasonable price.

Classification of polymer pipes

Polypropylene pipes are produced in various diameters, strictly regulated by GOST, from 10 mm to 1200 mm, and with different wall thicknesses. The classification of polypropylene pipes implies the division of products according to, according to the working pressure on the pipe walls, as well as according to the field of application.

According to the chemical composition of the raw materials from which pipes are made, all products can be divided into 4 groups:

  1. PPR (PPRS, PPR) is the so-called non-propylene static copolymer having a crystalline structure of molecules. Pipes made of such material are resistant to temperature extremes from -17 C to +140 C, shock-resistant and are preferred for use in laying sewer systems, heating and water supply. The size range varies from 16 to 110 mm.
  2. PPH products. The raw materials for the manufacture of such pipes use modern fillers that increase the impact resistance of the material: antistatic, antiprene, nucleator. Pipes made of this material are not used for heating and hot water supply, since they expand and deform when heated. Often they are used for laying ventilation systems, external supply of cold water, drainage. As a rule, such pipes are used in industrial construction and are produced in large diameters.
  3. ppb. The structure of the material is an alternation of homopolymer micromolecules, which have a different structure from each other. Pipes made of this polymer are used for the construction of cold water supply and installation of underfloor heating types.
  4. PPs. The so-called polyvinyl sulfide, a polymer with a unique molecular structure. The material is resistant to mechanical stress and heat, therefore it is successfully used in the construction of heating and water supply.

Depending on the purpose, polypropylene pipes can withstand a variety of pressures:

  • N10 (PN10) - the thickness of the polymer material varies from 1.9 to 10 mm, the working pressure on the wall is 1.0 MPa. Such products are used in the installation of "warm floor" systems, cold water supply lines. Pipes are manufactured with an outer diameter in the range of 20-110 mm and an inner diameter of 16-90 mm.
  • PN16 - pressure of the working fluid on the wall 1.6 MPa. A rather rare type of pipe used. Withstands heating up to +600С. It is used for a supply of cold and hot water.
  • N20 (PN20) - withstands a working fluid pressure of 2.0 MPa, with a wall thickness of 16-18.4 mm. It is in great demand in the construction of water supply lines (hot and cold). Withstands water heating up to +800С. The outer diameter of polypropylene pipes varies from 16 to 110 mm, the inner diameter - from 10.6 to 73.2 mm.
  • N25 (PN25) - the material is designed to work under a pressure of 2.5 MPa, it is distinguished by the reinforcement of the walls with aluminum or fiberglass. Such pipes are perfect for the installation of heating systems, hot water. Maintain temperature of the conducted water to +950C. The nominal bore diameter varies from 13.2 to 50 mm, the outer diameter is 21.2-77.9 mm.

Dimensions

Depending on the purpose, operating conditions, required pressure and throughput, you can select the diameters of polypropylene pipes, a table for which can be found on our website or on the Internet.

Polypropylene pipes replaced steel pipes, quickly displacing them from the building materials market. After all, this material is not inferior in strength to steel, while it is not subject to corrosion, it looks more aesthetically pleasing, and the propylene pipe has dimensions smaller than steel.

The marking, which is necessarily applied to polypropylene pipes, indicates only their outer diameter, so be careful when choosing a pipe of the right size.

How to choose a pipe for a heating system?

For designing a heating system at home, it is best to choose reinforced polypropylene pipes made in accordance with GOST R 52134–2003, since they are the least susceptible to deformation and changes in linear dimensions when heated.

Aluminum foil or fiberglass can be used as reinforcement material. The latter is even preferable, since it is easier to carry out (no need to clean the pipe and remove the aluminum layer).

If you are going to replace pipes in an apartment with central heating, then you will need a propylene heating pipe with a diameter that matches the diameter of the outlet pipe (it must be the inner diameter that matches).

If you want to design a heating system for a private house, then you cannot do without special knowledge or the help of a qualified specialist. For calculations you will need:

  • the area of ​​\u200b\u200bthe premises (as a rule, for approximate calculations, they take 0.1 kW per 1 m2 of area with a ceiling height of 2.5 m);
  • the speed of movement of the coolant (to select the diameter of the pipes, it is customary to take a value of 0.6 m / s);
  • the temperature difference between the supply and return (the standard for supply is 80 C, for the return - 60 C, i.e. the coolant cools down by 20 C).

To simplify pipe diameter calculations, you can use the table. For example, it is required to calculate the diameter of the pipes of the heating system for a one-story private house with an area of ​​100 m2. To heat it, a thermal power of 10 kW is required, i.e. 10000 W. The optimal coolant velocity is highlighted in pink in the cells. Therefore, we find the value of 10,000 W and draw a line from it to the first pink cell with a value of 0.6 m / s, and then up to the value of the required diameter. It turns out that for heating our house we need pipes with a diameter of 25 mm.