Options for sewer pipes for burying in the ground

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  1. ConvenienceUnder the ground, consider the advantages and disadvantages of various materials, the required diameter and options for connections.

    Which pipe to use for sewage underground

    The market offers to our attention pipes for underground sewage of different diameters, materials and connection options.

    To make an intelligent choice, you need to consider:

    • temperature and chemical aggressiveness of wastewater;
    • discharge volumes during periods of maximum load;
    • minimum temperature of the climatic zone;
    • sewer depth and angle;
    • soil type.

    external sewer pipes must meet ’s numerous requirements: be strong, reliable, wear-resistant and frost-resistant. Properly tailored to the specific conditions of sewage pipes will ensure effective removal of wastewater for many years.

    Pipe Material

    Sewer underground can be laid using the following materials:

    • cast iron;
    • polyvinyl chloride( PVC);
    • polypropylene( PP);
    • polyethylene( PE);
    • asbestos cement;
    • ceramics.
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    The last two options are used very rarely, and more and more users opt for pipes made of cast iron and plastic.

    Cast Iron Pipes

    Gray cast iron is inferior in its characteristics to malleable cast iron. In the modern version, iron-free pipeless sml pipes are recommended( you can learn more about them and you can choose on this page).

    Advantages:

    • durable;
    • service life up to 85 years;
    • withstand heavy loads;
    • resistance to temperature extremes.

    Disadvantages:

    • not suitable for saline soils;
    • are heavy, increasing the cost of delivery and complicating the installation process;
    • rough surface reduces the rate of flow of waste and provokes blockages;
    • high price.

    Pipes from polyvinyl chloride

    PVC pipes intended for external use are produced in orange. The grays have a wall thickness of 2.7 mm and are not able to withstand the pressure of the soil; therefore, they are used for the installation of exclusively internal sewage. Corrugated pipes are intended for laying into the ground without boxes to a depth of more than two meters.

    Advantages:

    • reasonable price;
    • resistance to temperature extremes;
    • strength, wear resistance;
    • are not destroyed by aggressive chemistry;
    • inner walls are smooth, therefore no growths are formed on them;
    • light weight, which makes installation easier;
    • corrosion resistance.

    Disadvantages:

    • if the temperature of the effluent is above 40 C °, it quickly becomes unusable due to the temperature elongation of the material;
    • suitable only for gravity drainage;
    • apply to small private homes.

    It is also worth noting that the characteristics of PVC pipes may vary depending on the manufacturer. In addition, such pipes can be different in stiffness , and depending on it can be used at different depths. The toughest pipes of class S can be used at a depth of up to 8 m, medium-sized pipes of class N can be used at a depth of 6 m, and light tubes of class L can be used at a depth of 2 m.

    Polypropylene pipes

    Advantages:

    • smooth inner surface;
    • service life up to 100 years;
    • resistant to temperatures up to 100 ° C;
    • does not decompose under the influence of acids and alkalis;
    • light weight, which simplifies transportation and installation;
    • installation is quite simple and fast, does not require the use of special equipment.

    Disadvantages:

    • are soft, can deform at high pressure;
    • pipes with increased wall thickness, intended for burying to a greater depth, are more expensive;
    • deteriorate under the influence of ultraviolet radiation, which complicates storage.

    Pipes from polyethylene

    For sale there are smooth and corrugated, with greater strength.

    Advantages:

    • load resistance allows you to lay pipes from PP to a depth of 15 m;
    • smooth surface with high bandwidth;
    • light weight;
    • for sale a wide range of connectors, tees and taps that facilitate the installation process;
    • service life exceeds 50 years.

    Disadvantages:

    • can not be used for effluents with temperatures above 65 C °;
    • deteriorate from UV radiation;
    • can be laid only in the ground, the exit of a part of the system over the ground is not allowed.

    With a huge number of advantages, plastic has a low strength, so the outer surface of the pipes is made corrugated, increasing their rigidity. At the same time, the inner surface remains smooth so as not to trap drains.

    Asbestos cement

    For the production of such pipes, a mixture of Portland cement and asbestos fiber is used.

    Advantages:

    • excellent resistance to aggressive media, so virtually any drains can be drained through such pipes;
    • durability, and in this regard, asbestos-cement pipes are the leaders, as they can be used for up to 100 years;
    • ease of installation, since it is quite simple to fit the individual parts of the pipe;
    • light weight, which makes installation easier;
    • such pipes are not prone to overgrowth, so for many years they will serve as they should.

    Disadvantages:

    • is highly brittle, since even minor mechanical damage can compromise the integrity of the material. Even new pipes at the ends can have chips and cracks, so when you buy you need to carefully look to them;
    • delivery complexity due to high fragility.

    These disadvantages negate all the advantages of asbestos cement pipes, so they are practically not used today.

    Ceramics

    Ceramics have been used for the production of sewage pipes since antiquity, and today this material is still used for this purpose.

    Advantages:

    • high resistance to temperature extremes, extremely low and high temperatures;
    • complete inertness to any substances, even strong alkalis, even acids. Such pipes can withstand the impact of absolutely any runoff;
    • ease of installation;
    • internal surface has a low roughness, which means that it will not overgrow and clog.

    Disadvantages:

    • too high brittleness, which complicates the transportation of pipes and their installation. New pipes may already have cracks, and their presence is indicated by a slightly rattling sound when tapping the pipe;
    • ceramic pipes are not very long, which leads to the need to make a large number of joints, and this negatively affects the integrity of the system;

    It is because of the high fragility that it is very difficult to use ceramic pipes, and they are almost forced out of the modern market.

    Diameter

    When choosing the diameter of the sewer pipe, it is necessary to take into account the external and internal dimensions, since the thickness of the walls can differ significantly.

    For household domestic sewage , use the standard 110 mm .This diameter is enough to service a country house. When merging into a single sewer network of several houses or a whole village, the diameter should increase in accordance with the calculations for the project.

    All the time, it was a question of pipes with a circular section, which are used in the absolute majority of cases, because drains move along them as quickly as possible. However, this is not the only option. Sometimes, elliptical-shaped pipes are used: they are necessary when the ground creates strong pressure on the pipes or when the load of drains on them is too high. When the sewer is not too deep( up to 1 m), you can use pipes with a semicircular and rectangular cross-section. It is also worth noting that if the sewer system is not located deep enough, then it is necessary to isolate it to avoid breaking the pipes in the cold season.

    . Connection format.

    • . Welding is the most complex, requiring special knowledge and application of equipment. Welding is performed on metal and plastic pipes. Such compounds are extremely inconvenient in cases of need for repair.
    • Flame - cut one pipe is installed in the socket of another. The tightness of the joints is achieved through the use of rubber seals and sealants. When using this method, when installing cast-iron pipes, an additional stamping is done with tow.
    • Bezrustrubny ( flanged, muftovy) - smooth at both ends of the pipe put the joint into the joint, the rubber cuff is applied to the connection and tightened with a clamp. The no-joint method of joints is most convenient for repairs and replacement of a sewage site.

    After analyzing which pipes for sewerage under the ground fit most in a particular case, you will get rid of many problems associated with the difficulties of cleaning and repair.

    Tags: Pipes
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