PVC pipes due to their low weight and many other technical characteristics are one of the best solutions for laying systems for various purposes. Installation work is not accompanied by difficulties, but you need to know what features a PVC pipe has. Additional features of the described products include:
- long service life;
- affordable cost;
- low weight;
- ease of installation.
Low weight allows installation without the use of special fasteners. In addition, you will not need an expensive tool, you can lay the pipeline yourself, while saving your money. As one of the significant advantages, the absence of disadvantages that are characteristic of cast-iron and metal pipes should be highlighted.
That is why these pipes are increasingly used in many areas of human activity, displacing products from other materials. After all, they are more durable, do not provide for complex andcostly maintenance, and can be installed at minimal cost.
Specifications
PVC pipes have outstanding performance features. They are characterized by high ring rigidity, due to which the products are able to withstand internal pressure up to 120 atmospheres. The pipes are extremely resistant to temperature deformations. When heated, the pipe lengthens by only 5% of its original volume. As for frost resistance, PVC is not so resistant to such influences. Therefore, the laying of pipelines from this material must be accompanied by thermal insulation.
The pipe must not be cooled below -15 °C. PVC pipes are not so good heat resistance. The material begins to lose its stiffness when exposed to temperatures above 78 °C. External and internal surfaces have minimal roughness, which prevents silting of the pipeline. Structural material can have quite impressive light transmission. You can meet a transparent PVC pipe on sale, however, in most cases, the products are supplied in a painted form. But even in this state, PVC is able to resist ultraviolet radiation better than other types of plastic.
Water transported through PVC pipes does not change its properties. This indicates that communications of this type can be used for pumping not only technical, but also drinking water. Among the main advantages of such pipes areinertness to the transported medium and high ring stiffness, which makes it possible to lay high-pressure pipelines.
As for hot water systems, PVC cannot be used in them, since the temperature limit of the pipeline operation is only 40 ° C. While other advantages are required from pipes in non-pressure systems, among them are the minimum wall thickness and the high smoothness of the inner surface. As for the thickness, it can vary from 1.5 to 6 mm. These properties make it possible to lay a sewer system of impressive length. As a result, it is possible to obtain systems with a small cross-section of the pipeline, which are able to divert a significant amount of wastewater.
Some characteristics of non-pressure PVC pipes
Free-flow PVC pipes can be laid and connected to each other using O-rings. This method of installation is acceptable for external and internal systems. Non-pressure pipes have a thickened socket at one end, the diameter of which can vary from 63 to 315 mm. Such pipelines can be operated at a maximum working pressure of 0.63 MPa. However, the pipe itself is capable of enduring up to 20 MPa.
Characteristics of PVC pressure pipes
PVC pipes can also be pressure. They have the ability to endure impressive pressure, so forpiping assembly uses cool products. They look like bell-shaped ones, but at their end there is a special thickening in the form of a bell.
The diameter of the pressure type PVC pipe can vary from 10 to 90 mm. In accordance with GOST, 11 original standard sizes can be counted. The maximum working pressure is 2 MPa. If this value is exceeded, then the adhesive line will not cope with the load. On sale you can also find a pipe without a socket, it is used when assembling the system of the following types of fittings:
- sealing;
- threaded;
- adhesive.
The diameter of smooth pipes varies from 10 to 315 mm. Such products can be used not only in pressure, but also in non-pressure systems.
Corrugated PVC pipes: properties
PVC corrugated pipe has the ability to self-extinguish, this is a priority, which is one of the most important when laying electrical wiring. The pipe does not burn, but melts and smolders, completely attenuates and stops the fire. Such pipes are durable, they have a crack-resistant water-repellent surface that does not corrode, does not lose its properties and does not dry out during the entire service life.
Electrical corrugated PVC thermoplastic pipes. They respond minimally to temperature changes. The operating temperature can vary from -20 to +80 °C. As for installation, it must be carried out at a temperature of-5 to +60 °C. Among other things, polyvinyl chloride acts as a dielectric, which indicates its insulating ability.
Mounting Features
The pressure pipeline starts from the source and ends with a tap. A non-pressure pipeline at the beginning has a PVC-type siphon, while at the end there is a septic tank buried in the ground. To connect the septic tank and the siphon, it is necessary to equip a winding line, which will include fittings and pipes. The installation process can be carried out according to one of three technologies. The first involves the use of a socket, the second - cold welding, while the third - threaded fittings.
Features of PVC sewer pipes installation
PVC sewer pipe is laid according to a certain technology. At the first stage, the elements must be adjusted to each other and check whether the slopes and angles match. Next, markup is carried out so as not to get confused in a large number of components. The elements are interconnected, it is important at this stage to check that the pipe enters the socket by 2/3 without effort.
For tightness, the joints are glued with a special compound. In order to increase adhesion, mating points should be roughened. Once the adhesive has been applied, the fitting can be put on. After completing the installation work, you need to check the system for leaks. If the leak is not detected, then the installation work was carried out successfully.
Assembly inbell
PVC pipes (GOST 51613-2000) can be assembled into a socket. Tee fittings are required for a T-piece from one branch to another. A sealing ring should be placed in the socket, and the smooth end of the pipe should be installed in the sealing socket. The ring will hold the smooth part and seal the joint.
Assembly using cold welding
Cold-welded installation can be practiced when laying pipelines when it is necessary to provide a corner or tie-in. If in the latter case a reinforced pipe is used, then in the first case, adhesive fittings and smooth pipes can be dispensed with.
Assembly using glue is as follows. At the first stage, it is necessary to cut the end and calibrate, that is, clean and deburr. The master should check the immersion depth of the smooth end, followed by marking.
After that, the outer surface of the smooth end is treated with a solvent, and the joint is cleaned. With the inner surface of the fitting and socket, it is necessary to carry out a similar action. Once cleaning has been carried out, a special adhesive must be applied to the surface of the fitting and pipe, which should cover the inner surface and the marked area. At the final stage, the pipe must be pressed into the socket or fitting to the depth marker, and then rotated around the axis, this will distribute the adhesive evenly.
Conclusion
If you decide to purchase a pipepolyvinyl chloride, the price of this product should interest you. For example, a corrugated pipe for laying electrical wiring can be purchased for 10.67 rubles. per metre. In this case, we are talking about a product with a diameter of 25 mm. A cable fire-resistant line made of corrugated PVC pipes will cost the consumer 16.73 rubles. per metre. But you will get a light rigid pipe for electrical wiring for 17.15 rubles. per meter.
Fire-resistant cable line, which is characterized by low weight and rigidity, will cost 26.89 rubles. per metre. Its diameter is 25 mm. Fire resistance corresponds to classes E60-E90. You can buy a pipe for laying electrical wiring in a package - a bay (25 m). The product has a probe, and the pipe diameter is 25 mm. You can buy a PVC pipe of this type for 333.38 rubles. per pack.
Consumer reviews indicate that the advantages of PVC pipes are much greater than the disadvantages. They are great for heating, sewage, etc. Consumers who have purchased PVC pipes have not regretted their choice.
