Sizes of plastic pipes in accordance with applicable

According to what regulatory documents are polymer pipes produced? What kind of plastic used for their manufacture? Finally, what diameters of plastic pipes are provided for by current Russian standards? Let's try to answer these questions.

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First, let's look at the list of materials.

• Polyvinyl chloride is used for the manufacture of pressure and free-flow sewage. Water pipes from this polymer are not widely spread due to the combination of brittleness and low (no more than 60 ° C) working temperature.
• Polyethylene is used primarily for the installation of cold water supply pressure pipes. The temperature limitations for this polymer are even tougher than for PVC: polyethylene begins to soften already at 45 - 50 degrees.

Note! Plastic pipes of large diameter used as sewers are mostly the same polyethylene.

• Polypropylene, in contrast, is very heat resistant. The operating temperature range of up to +95 ° C allows it to be used for heating and hot water supply. In addition to pressure pipelines, plastic is used for the construction of sewage systems.
• Cross-linked polyethylene is also used for these purposes: the formation of cross-links between polymer molecules radically changes its physical properties.. The price of the material, of course, is noticeably higher than that of ordinary polyethylene.

Standards

Table of diameters of plastic pipes intended for water supply, heating systems, pressure sewage, etc., is contained in GOST 52134-2003.

But with gravity drainage the situation is much more fun: Russian standards regulate the range only for polyethylene, and GOST 22689.1-89 provides for three sizes - 50, 90 and 110 mm. PVC and polypropylene free-flow pipes are manufactured according to technical conditions and on the basis of contracts concluded with customers.

Let's return to GOST 52134-2003. According to the document, the marking of plastic pipes for pressure pipelines may include:

• The maximum allowable working pressure at a temperature of 20C. It is denoted by the letters PN and indicated in the atmospheres.
• SDR parameter describing the ratio of outer diameter to wall thickness. The higher its value, the lower the tensile strength of the pipeline.
• The outer diameter and wall thickness.
• An indication of the material from which the product is made. As a rule, the following notation is used:

Note! This is an incomplete list of materials described by the standard. We deliberately omit exotics such as chlorinated polyvinyl chloride or polybutene - simply because the chances of meeting them at the hardware store tend to zero.

So, let's go to the size. Alas, we will only have to define their boundaries, and not provide a complete list.

Polyvinyl chloride

The minimum diameter specified in the PVC-U standard is 12 millimeters. Maximum - 1000. Wall thickness varies from 1.5 to 30.6 mm.

Note! The assortment given in the standard does not mean that all products present on the Russian market will exactly correspond to the sizes indicated in it. Not only are many specific products manufactured according to specifications, you should not forget about imports. For example, a plastic pipe 70 mm document is not provided; however, Chinese suppliers offer it.

Polyethylene

As already mentioned, this polymer is massively used for the construction of water mains.

In addition to the dielectric properties and exceptional resistance to aggressive media, polyethylene is convenient because it retains its elasticity at low temperatures. Ground movement, formation of an ice block in the pipeline and other troubles, fatal for steel and cast iron, in this case will only cause temporary deformation with a return to the previous dimensions and geometry after the elimination of the factor causing it.

What about the size?

• The minimum diameter is 16 mm. The maximum is 1600.
• Wall thickness ranges from 2 to 61.5 mm.

Polypropylene

The minimum outer diameter has a plastic pipe of 10 mm. The maximum size is again 1600. The wall thickness is from 1.3 to 61.2 mm.

Crosslinked polyethylene

The diameter varies from 10 to 250 millimeters, the walls can have a thickness of 1.3 to 34 mm.

Areas of use

And now let's go back to a more practical area. What sizes should you use when building your own water supply, heating or sewage systems?

Water supply, heating

• Plastic pipe 16 mm is used to connect one to three plumbing fixtures (faucets, shower cubicles, toilet bowls, etc.). It can also be used for laying in a warm floor (as this is usually used cross-linked polyethylene) or for collector wiring heating.

• 20 mm is enough for distributing water supply throughout the cottage with 4-6 plumbing fixtures and for operating a heating system with forced circulation, serving a house with an area of ​​up to 100 m2.
• 25 mm are used as risers for heating and water supply in houses with a height of not more than 5.
• A diameter of 32 mm is typical for risers in buildings of high-rise buildings and for bottling of water supply and heating with a small number of apartments.
• 40 mm - bottled in an apartment building or in a cottage with a gravitational (gravity) heating system.

Sewage

For non-pressure sewage systems, the following size distribution is characteristic:

• Plastic pipe 50 mm is used to connect 2 - 3 sinks, sinks, showers, etc. In short, any plumbing fixtures, with the exception of toilet bowls.

Important: for connecting simultaneously used bathtubs and showers, plastic pipe 75 mm and above is used. What is the reason for the instruction? With the fact that when you drain the full bath, the 50 mm sewer will be filled; the normal drain from the shower will not be discussed.

• Plastic pipe 90 mm is used relatively rarely, mainly - for connecting installations of toilet bowls. But the 110-mm, by contrast, is highly demanded: this diameter is used to connect the toilet, sewer risers and roof planks (horizontal branches connecting the risers).
• 150 - 600 mm are used as a well outlet and for transporting wastewater between wells.
• A diameter of 600 mm is typical for collectors that unite the drains of the whole area of ​​the city.

Conclusion

We hope that our material will help the reader to choose the optimal solution for the installation of communications in his house or apartment.

As always, the video in this article will offer additional information. Successes!