Internal pvc sewer pipes - features and purpose
Today it is rarely possible to meet the repair of sewage networks in an apartment without replacing cast iron pipes with plastic ones. Although they are somewhat noisy, they are easy to install, inexpensive and much more durable. Before choosing internal PVC sewer pipes, it is desirable to know their characteristics minimally.
Purpose
The scope of application of polyvinyl chloride products depends on their physical properties. Therefore, first we need to know the nature of the appearance of this material. It belongs to a group of thermoplastics, retaining its shape after heat treatment and mechanical action.
The main components of polyvinyl chloride are stabilized chlorine and ethylene. In the production cycle, additional additives are also used to improve the thermal and mechanical properties of the products.
Therefore, it can be used to create a sewage discharge system, which happens:
- internal;
- outdoor;
- pressure head;
- gravity.
This classification applies to pipelines whose material was treated appropriately during production.
There are two types of PVC products:
- PVC - polyvinyl chloride;
- PVC-U - unplasticized polyvinyl chloride.
Most often use the latter option, due to the best technical characteristics and the possibility of installation in pressure sewage systems.
Technical properties
The operation of products is directly related to their technical characteristics. Below we consider the main technical characteristics of PVC sewer pipes, which relate only to this material:
| Mechanical strength | Due to external corrugation and the technology of three-layer manufacturing, products can be installed in an external sewage system, passing at a depth of up to 8 m. |
| Resistance to aggressive environment | This applies more to PVC-U pipes, because this material is used to transport chemical gases and liquids. |
| Smooth inner surface | This feature allows the working environment to "slide" inside the pipeline, almost without experiencing resistance. |
| Maintaining internal pressure | The main parameters are the design and thickness of the pipe walls. They are able to withstand a pressure of 6-16 bar. |
- The disadvantage is the temperature limitations of PVC products.. The instruction allows the use of working fluids with a maximum temperature of +65 ° C, and a minimum of -10 ° C. Although there are models where exposure to +90 ° С is briefly allowed.
- Plastic is significantly lighter than steel and especially cast iron, so it is possible to install them easily with your own hands.. For example, their running meter weighs about 2 kg, but may vary due to the wall thickness of the product or its diameter.
- An important parameter is the tensile strength at break, which is 50 MPa. After installation, the drain system can last for almost half a century without repair.
Tip: when choosing a particular product, it is necessary to recognize the operating parameters of the manufacturer, as they may vary.
The size
Laying the sewer line requires a careful approach, as its alteration requires a lot of effort, money and time. Therefore, when choosing, one should pay attention to the dimensions of the products, which directly affects the parameters of the entire system, in particular its strength and throughput, and their structure.
The length of the pipeline can significantly increase the cost of the entire sewer system. Therefore, care should be taken to minimize waste if using the optimal dimensions of products.
Diameter
An important characteristic is the diameter of PVC sewer pipes, since it determines the proper installation of the drainage system in a private house. Therefore, this parameter should be calculated in advance, taking into account the possible maximum discharge rates.
Also, the choice should take into account its specific classification.
- The internal dimensions of PVC sewer pipes - should be taken as a basis when calculating the capacity of the system.
- External - needed for the selection of insulation and mounting materials, depending on the wall thickness.
Tip: remember, the designation of pipes always indicates the outer diameter.
The minimum and maximum sizes of diameters depend on the type of sewer system - internal or external.
Inner tubes
Usually for domestic sewage use PVC products in gray. They are classified in terms of hardness to lightweight class and are not used for outdoor work.
The main characteristics of this type:
- smooth-walled;
- bell-type connection;
- OO 32, 40, 50, and 110 mm are most commonly used;
- product length - 315-3000 mm.
Due to their good rigidity, they have proven themselves to be risers in private homes. When installing complex sewer systems use special adapters, tees and knees, the price of which is low.
Conclusion
Steel and cast iron sewer pipes are gradually being replaced by plastic, due to the fact that the latter have significantly more advantages over them. This is noticeable in the sale of these products in construction markets and in stores.
PVC sewer pipes according to GOST make it possible to forget about blockages because of their smooth inner surface, the main thing is to correctly calculate the diameter and slope during installation. The video in this article will help you find additional information on this topic.