The pipe for external sewage at the moment is most often made of polyvinyl chloride. This material has proven itself quite well in many industries. It significantly facilitates the weight of the product, which has a positive effect on convenience during transportation and installation. The absolute corrosion resistance of PVC pipes is also an important factor.
A pipe for outdoor sewage made of PVC can be considered the optimal solution, since in this case there is a better price-quality ratio. Such pipelines are able to form a single system with the surrounding soil, which can absorb loads, has the property of self-cleaning, and the expansion coefficient in this case is very low. A much greater load is placed on the external sewer than on the internal one, therefore the production of pipes for it must be carried out from a polymer having greater strength. The walls of such pipes are uniform if the diameter is 110-200 millimeters, and three-layer if the diameter is 250-500 millimeters. In the second case, the middle layer is made of foam material.
The pipe for external sewage can well be made of asbestos cement, cast iron, polyethylene. The first type has such advantages as cheapness and reliability, but it is quite fragile, which may cause transportation problems. Polypropylene pipes can last more than half a century.
You can consider what kind of sewer pipes are for external sewage. Asbestos-cement are made from asbestos fiber and Portland cement. Their weight is quite small, their strength is high, they maintain smoothness for a long time, due to which bandwidth is preserved . Mounting them is very easy.
A ceramic pipe for external sewage is not used very often. However, in terms of performance, it can even surpass cast iron. Such pipes are durable, well retain the smoothness of the inner surface, are not subject to the influence of corrosion processes. Small length and fragility - these are their main disadvantages. A significant number of joints are unacceptable for long pipelines.
A classic option are cast iron pipes. They are very reliable, have good mechanical and chemical strength. During their installation, bell-shaped connections are used that can guarantee reliable contact in the conditions of proper sealing. High weight - this is the most significant drawback of such pipes, significantly complicating the process of their installation. If we are talking about laying a large- diameter system , then there is no way to cope without the use of special lifting equipment.
PVC pipes for outdoor sewage are most often used. This option has a lot of advantages:
- relatively low cost;
- ease of installation;
- chemical resistance;
- durability.
All these qualities have made this option the most suitable for various purposes.