To install the sewerage system, it is necessary to purchase pipe products and connecting elements of the sizes indicated in the project. Trade offers a wide range of standard sizes of sewer pipes, which allows you to create a pipeline of any configuration with any wall thickness.
Corrugated Corsis
Main parameters of the pipeline
- outer diameter of the sewer pipe;
- inner diameter;
- conditional passage (Dy or Du) - nominal or rounded value of the internal section;
- nominal section (Dn or Dn);
- wall thickness.
On the marking of all plastic tubular products, the outer section and wall thickness are indicated, - nominal bore in millimeters. Problems can arise when combined fittings (metal and plastic) are used during installation, which are marked in millimeters and inches. In such situations, it is necessary to compare elements in different systems of measurement.
SNiP 2.04.01-85 determines the calculation of the diameter of the sewer pipe. But for a house or apartment, these formulas are too complicated. In practice, a different approach is used - in an apartment or a standard country house it does not exceed 10 cm.
Based on this:
- for a sink, bathtub, washbasin, urinal, bidet - 5-7.5 cm;
- for the toilet bowl - plastic pipes with a diameter of 100 or 110 mm;
- outlets from washing machines and dishwashers - 2.5 or 3.2 cm;
- wiring around the house or apartment - 5 cm;
- riser in a house with no more than five floors - internal Ø 110;
- riser in a house above five floors - Ø160;
- connection of several risers (lounging) in a multi-storey building - 200;
- outlet of drains to the outside - 16 or 20 cm;
- yard system - Ø 300;
- outlet to the well, the area between two wells - 20 cm.
If plastic materials are used for sewerage, then 4 cm can be used instead of 5 cm, 10 cm instead of 10.1 cm, etc. This is due to the smooth inner surface of these products, which during operation is practically not covered with rust or other deposits.
There is such a thing as the smallest allowable size, defined by the Sanitary Norms and Rules (SNiP):
- for intra-quarter drain and street network - 20 cm;
- for the intra-quarter storm drainage network - 20.2 cm;
- for street storm network - Ø 250.
The cross section and wall thickness are interrelated parameters - the larger the cross section, the thicker the wall. The weight is also directly proportional to the cross section. For example, an external section of 16 cm - weight 2 kg, or 10.1 cm - weight just over 1 kg. An important indicator is the length of the segments. The shortest is 1 m, the longest is 6 m.
Plastic pipe products for sewerage
Made from polyvinyl chloride (PVC), polypropylene (PP) and polyethylene (PE). To determine their internal section, it is necessary to subtract the wall thickness multiplied by two from the value of the external section (they are indicated in the marking).
According to GOST R 51613-2000, the diameter of non-pressure PVC sewer pipes can be 5, 7.5, 9, 10, 1.1, 15, 16 cm. Products with a cross section of 25 and 30 cm are used to drain waste from industrial facilities. Their main advantage - they are mounted in the same way as thin ones - in the socket.
The size of polypropylene materials is determined by GOST R 51613-2000 and GOST 22689.2-89 - 5, 10 and 15 cm. But there are large diameters with a wall of 5 mm. These products are used for the installation of large main pipelines.
Standard sizes of polyethylene are regulated by GOST 22689.2-89. The choice of these products is not great - 4.5 cm, 90 and pipe 110 inner diameter. The thickness of the walls of products made of low-pressure polyethylene is 3 - 5 mm. Sold in lengths from 2 to 9 meters.
The diameter of the plastic sewer pipe must be selected based on the availability of connecting elements of the appropriate size. For example, for material with a section of 7.5 or 9 cm, it may not be possible to find fittings.
To connect a plastic intra-apartment sewer to a cast-iron riser, you can use a combined fitting or a rubber gasket, which is sealed with silicone or linen winding. If there is a large hole in the cast iron riser, you can combine fitting and silicone, or fitting and winding.
Add. material: GOST R 51613-2000 Pressure pipes made of unplasticized polyvinyl chloride. Specifications. download link >>>
Add. material: GOST 22689.2-89 Sewer polyethylene pipes and fittings for them.
