Pvc pvc pipes: scope and technical features

Modern polymers are actively replacing metals from all spheres of production. This is caused by higher performance characteristics of materials and, most importantly, a fairly reasonable price. PVC pipes can be produced for the transport of liquids and for electrical purposes. But both sewer and electrical corrugated polyvinyl chloride pipes according to GOST, adopted in our country, have many varieties.

Products for electrical needs

Polyvinyl chloride products are an excellent material for laying electrical networks of both low and high voltage, communication lines and various other cable lines. They meet almost all the requirements of GOST, and the price of these products allows them to be used everywhere.

How are they good

• This material practically does not sustain combustion., to be exact, it belongs to the category of self-extinguishing.
• In electrical engineering and power engineering in general, stray currents and pickups are a big problem.. Plastic is an insulating material and therefore is devoid of this significant drawback.
• If the cable is mounted in a secure, insulated cable channel, it no longer needs strong insulation., Because of this, several lines can be laid in one pipe.

• PVC can be used in wet areas, plastic is absolutely not susceptible to corrosion, resistant to aggressive chemicals and UV exposure.
• According to generally accepted norms of SNiP, this material is absolutely ecologically neutral and safe for humans..
• This type of polymer is easily processed., it can be glued, sawed or soldered.
• Of course, this is not metal, but having a low strain factor, these cable channels are reliable protection for electrical networks..
• Lightweight material, therefore, it does not require specially reinforced supporting reinforcement.
• PVC products provide reliable protection against dust., do not accumulate condensate, plus they do not need additional staining.
• Finally, the installation manual for this type of product does not require high qualification., almost any person who knows how to work with traditional plumbing tools and is familiar with the basics of electrical engineering is able to arrange such a line with his own hands.

Important: with all the advantages of PVC pipes, such cable channels should not be mounted on a wooden or flammable basis. In these cases, the metal hose is used.

Classification of pipes for electrical purposes

This material is divided into two main categories. Rigid, smooth-wall products are used for external cable pipelines. For the installation of internal wiring are more suitable soft, corrugated pipes.

Corrugation can be mounted as an open method, on a wall or supporting reinforcement, or under drywall, in ceilings or lay in a concrete screed.

Electrotechnical corrugated polyvinyl chloride non-combustible pipes with a probe are especially popular here. The highlight is that the steel wire was originally laid in the pipe, to which you can attach the end of the cable and pull the electrical or connecting line unhindered.

Tip: when laying a line in a pipe with a probe, a wire or cord should also be attached to the edge of the probe along with the cable to be mounted. After installation, you will have a cord in the pipe, with which you can stretch additional lines.

All electrical materials of this kind are classified according to GOST 18599-83.

According to this standard, division into four categories is provided.

1. "T" - heavy materials, as a rule, these are thick-walled pipes of large section.
2. "C" - medium.
3. "SL" - moderately light.
4. "H" - non-standard products.

Also quite widely represented size range. The diameter of electrical pipes ranges from 8 to 250 mm, with different wall thickness.

In addition, depending on the purpose and type of networks, products of different colors are used. For internal wiring, PVC is the most common PVC pipe with a diameter of 25 mm.

Types and features of PVC sewer pipes

By analogy with the designs of electrical orientation, sewer systems can also be mounted from smooth-wall and corrugated PVC products.

Rigid, smooth-walled pipes

In contrast to electrical or communication lines, smooth-wall sewer pipes are more designed for the installation of an internal wastewater system. Traditionally they are made gray, sometimes white.

Internal floor layout in the residential sector, most often performed by pipes with a cross section of up to 50 mm. Risers in the residential sector are mainly equipped with highways with a cross section of 100 - 110 mm.

In private construction, with a small volume of wastewater, for the installation of an external system or a non-deep-seated system, products of increased strength of orange color can be used. In general, orange indicates all sewer pipes intended for external wiring.

Important: in this case, the minimum recommended diameters are specified according to GOST for fan systems. But among specialists there is a law that says that the larger the cross section of the sewer, the less likely it is to block or freeze.

The use of corrugations in sewer systems

Currently, for the installation of external and underground communications it is customary to use a corrugated pipeline. As mentioned earlier, outdoor fan communications are made in orange. They are connected with sockets. Bells have a slightly larger diameter and are completed with rubber seals.

Corrugated PVC lines are designed for serious underground loads, so some models can be laid to a depth of 8m. Another serious advantage is that this material has a rather low coefficient of thermal expansion, as a result of which they can withstand significant temperature differences without any problems.

The standard diameter of manufactured products ranges from 110 to 630 mm. The use of these lines is not limited solely to the sewer line. They are widely used for the arrangement of stormwater runoff. Drainage urban systems or structures intended for land reclamation in agriculture.

Actually soft, corrugated communications are relatively recent scientific development. High technical and operational characteristics are due to the two-layer structure of the pipe. The outer layer, on which the stiffeners are located, is made of low pressure coating or HDPE.

Inside mounted coating high pressure LDPE. In addition to special strength, the inner layer has an almost perfectly smooth surface, which significantly reduces the likelihood of sewer blockages and growths.

Pros and cons of PVC sewage

• The two-layer structure of products, along with good elasticity, guarantees a sufficiently high strength.
• If the system is not filled with water, then it can safely withstand ultra-low temperatures without cracking.
• Modern polymers are not susceptible to corrosion, and unlike cast-iron or steel pipelines, their durability is much higher.
• The inner coating is not afraid of any chemistry.
• The material is ecologically neutral, it can lie in the ground for hundreds of years without decomposing and polluting the environment.
• An important factor is the low weight. A team of workers can assemble such a system with their own hands, without attracting additional lifting mechanisms.
• Finally, the price of plastic is significantly lower than that of steel or cast iron.

Of the significant drawbacks, experts state the fear of high temperatures. In working condition, the inner surface is designed for a temperature not higher than +40? С. Developers allow thermal exposure to liquids with temperatures up to +80? C, but it can only be short-term. Otherwise the pipe will crack.

A few words about the pressure pipes

It is impossible not to recall such a broad direction as water-pressure systems. These systems are available exclusively in hard, smooth-walled version. It makes no sense to list the advantages and disadvantages, for PVC they are similar. It is worth mentioning that these constructions are not connected in a threaded manner; here only soldering is used.

Recently, PVC casing pipes have come into wide use. They are used for arranging wells for water. Sections here are connected by a threaded method. A distinctive feature is the increased resistance to external pressure, along with good elasticity.

The video in this article shows some of the uses of the material.

Conclusion

It should also be noted that, along with all the advantages, the transportation of pipes should be carried out carefully, it is impossible to drag them, and in general it is desirable that there should be as few scratches as possible. This is especially important for water pipes, they can burst at the site of damage. Therefore, when buying carefully inspect the goods.