Corrugated PVC pipe is a truly indispensable material that is significantly superior to other types of pipes in various areas of use. plastic pipes possess the widest range advantages, while their disadvantages can not be called significant.

What are corrugated PVC pipes

Corrugated PVC pipe is a product made of polymers. Polyvinyl chloride itself, from which the corrugation is made, quickly became popular due to its undeniable advantages and low price. In fact, the scope is quite wide, and it is easy to choose the optimal variety for each task. Due to its good flexibility, the corrugated PVC pipe easily passes even in hard-to-reach places in the room and allows you to minimize the time for installation work on cable laying.

The flexible corrugated pipe is able to withstand mechanical loads, and also eliminates the possibility of damage to the cable. Due to the material from which it is made, it is isolated from currents, which allows you to safely carry out the installation of electrical cables without fear of receiving an electric shock.

LDPE and PVC, what's the difference?

The main difference between pipes made of high pressure polyethylene in relation to pipes made of polyvinyl chloride is the scope of their use. According to fire regulations, LDPE pipes (LDPE) are not suitable for laying electrical cables in them, since they spread combustion, unlike PVC pipes. Therefore, they should be laid in a monolithic non-combustible environment (in other words, they must be poured directly into concrete). Since the laying of pipes of this type is only allowed hidden, this limits the scope.

The second difference is that, unlike polyvinyl chloride, polyethylene is easily recycled, which increases the degree of environmental friendliness.

The third difference between LDPE pipes is their wider temperature range compared to PVC pipes: from -50 to +90 degrees Celsius.

These differences are quite fundamental, so it is necessary to clarify the material from which the pipe is made before buying (they look almost the same outwardly).

The use of LDPE pipes instead of PVC analogues often causes fires, so it is necessary to mention the differences in materials.

Advantages and disadvantages of the material

There are a number of undeniable advantages of using this type of pipe, among them are the following:

• the flexible corrugated pipe is an excellent dielectric and is incombustible (when exposed to a direct flame source, it slowly melts, but has the property of self-extinguishing, thereby preventing the spread of flame through it),
• wind and waterproof,
• differs in durability, and does not lose the protective properties over time,
• has a good degree of protection against the effects of physical exertion,
• dielectric strength - up to 2000 volts,
• PVC is good insulation, pipe resistance reaches 100 ohm,
• high environmental friendliness and low toxicity of the material,

• durability (calculated service life up to 50 years),
• the flexibility of the pipe allows you to form routes of varying geometric complexity without incurring additional costs.
• Of course, this type of pipe is not a full-fledged replacement for communication systems from other types of pipes for a number of reasons that are usually considered to be disadvantages:
• polyvinyl chloride is unable to withstand high temperatures. Installation is not recommended at temperatures environment below 5 degrees. The maximum working temperature of the material is 45 degrees Celsius,
• corrugated PVC pipes do not tolerate direct sunlight, so it is not recommended to lay them outdoors (except for those varieties that have a reinforced structure).

Varieties of corrugated pipes

To date, two types of pipes are available: those intended for sewerage and analogues for pulling power and low-voltage cables (computer UTP and telephony). But besides this, there is a classification according to the type of strength:

• lungs,
• heavy,
• superheavy.

Light corrugation should be used only for the installation of external networks and only inside the building due to its sensitivity to sunlight (ultraviolet exposure). The flexible corrugated pipe allows you to create mounting connections at any angle, up to 360 degrees - which saves money when equipping complex wiring diagrams.

Heavy corrugated pipe is characterized by greater mechanical strength and the possibility of laying underground.

Extra-heavy PVC corrugated pipe is used in areas of increased physical activity. Such material is laid in soil (to a depth of more than one meter), in concrete, directly under the roadway. This variety is recommended for use in places with increased requirements for the safety of electrical wiring (such buildings include any building with a constant large crowd of people: hospitals, schools, hotels, etc.).

PVC pipes for cable laying

PVC corrugated pipe is used for cable laying for various purposes- from telephony to electrical cables with high voltage (up to 2000 volts). It is able to protect the cable in the first place from mechanical damage and weather conditions, and also acts as a protective dielectric layer.

The diameters of corrugated pipes are varied, but there are certain specifications that must be used for work. For example, for laying a cable to lighting fixtures a PVC pipe with a diameter of 16 mm is sufficient, for sockets and switches a larger diameter of 20 mm is required, for laying conduction systems between floors and in walls, the pipe diameter must be at least 40 mm. You should also take into account the cross section of the cable and its amount inside the corrugation in order to exclude the possibility of dense laying. PVC corrugation has a working temperature of -25 to +60 degrees, which allows installation work for indoor installation at any time of the year. Corrugated pipe, the price of which is not high, is better than other protective shells for electrical work.

Each type of corrugated pipe is produced in two versions: with and without a probe. The probe is a rigid metal wire passing through the entire corrugation, which ensures the convenience of pulling the cable (it is enough to attach the end of the cable to this wire and pull it out from the other side). Similar simple engineering solution, according to experts, has reduced the time spent on pulling cables up to three times. In addition, the great flexibility and light weight of the corrugations allow it to be laid without special tools and, in fact, without expending effort. A corrugated PVC pipe with a probe (pull) will be the best choice for creating a cable system.

For trimming, any cutting tools, including ordinary scissors, fastening to the surface occurs with the help of special fasteners, often plastic brackets that are mounted to the surface with nails act as their role (nails are used as the basic fastening element, but not suitable for every wall).

Thanks to its good flexibility and ability to attach at any angle, as well as its low weight, it is possible to pull the cable even in hard-to-reach places.

Corrugated PVC pipes for sewerage

The corrugated pipe for sewerage has proven itself quite well. When installing new systems or replacing old ones, it is easier and more convenient to work with such materials. Sewer pipes able to withstand heavy loads and weights, which allows them to be mounted directly underground. Often they are made two-layer (this is especially true for corrugated pipes), from polyethylene that can withstand high pressure for the inside of the pipe and polyethylene low pressure for the outside. Like other types of PVC pipes, sewer pipes are not suitable for use in high temperature environments, the maximum allowable value operating temperature+40 degrees.

It is mainly used for domestic sewage (corrugation is preferably used to drain water through the washbasin sink, or for a toilet, most often found as a drain pipe from washing machine). For sewerage, rigid PVC pipes of a larger diameter are mainly used, which are distinguished by a significantly higher degree of mechanical strength.

Main advantages:

• high strength,
• good resistance against chemicals,
• tightness,
• environmental friendliness,
• light weight (which is especially important during installation and transportation),
• low price (a distinctive feature of all types of PVC pipes for any task),
• resistance against the appearance of mold and microorganisms.

High temperature water exposure (up to 80 degrees) is allowed, but only for a short time. The pipe material may melt, which will lead to a violation of the integrity of the pipe and possible leaks.

Corrugated PVC pipes

Corrugated pipes are used for laying power and low-current lines of a hidden type inside buildings and structures. Due to the fact that the pipe has sufficient flexibility, cable installation is carried out with minimal labor and almost no additional accessories are required.

Design features:

Specifications:

II. Degree of protection - IP55

VII. Color - gray RAL 7035

Corrugated PVC pipes

Corrugated pipes are used for laying power cables (VVG and VVG ng cables, NYM cables) and hidden low-voltage lines inside buildings and structures. Due to the fact that the pipe has sufficient flexibility, cable installation is carried out with minimal labor and almost no additional accessories are required.

The PVC corrugated pipe meets the requirements of TU 2248-002-18461115-2010.

The main advantages of PVC corrugated pipes:

1. The occurrence of fire in case of short circuit is excluded.

2. Has additional wiring protection against mechanical damage.

3. The pipe is made of a material that is an ideal dielectric.

4. Due to the fact that the pipe is flexible, it allows quick and convenient installation with a minimum number of accessories.

5. The presence of the probe ensures the convenience of pulling the cable.

Design features:

The flexible corrugated pipe is made of self-extinguishing PVC.

The presence of a metal probe (broaching) along the entire length of the pipe facilitates pulling the cable after installation.

In order to save money, you can purchase a pipe without a probe;

The packaged corrugated pipe is light in weight and convenient for manual loading.

The packaging of the pipe is a coil in a hermetic shrink film, which protects the pipe from moisture and dust.

Specifications:

I. Material - self-extinguishing PVC structure

II. Degree of protection - IP55

III. Strength - over 350 N per 5 cm at 20 ° C

IV. Operating temperature range - from -5 °С to +60 °С

v. Electrical resistance- not less than 100 MΩ (500 V, for 1 min)

VI. Fire resistance - not flammable

VII. Color - gray RAL 7035

Questions and answers about PVC corrugated pipe series

Olga asks:

How to choose a corrugated pipe for a cable?

1. We look at the size of the outer diameter of the cable, the inner diameter of the corrugated pipe.

Cable cross section VVGng (mm²)	Cable diameter VVGng (mm)
number of cores and section	outside diameter
cable NYM (mm²)	cable NYM (mm)
	External diameter	Inner diameter
corrugation with probe 16
corrugation with probe 20
corrugation with probe 25
corrugation with probe 32
corrugation with probe 40
corrugation with probe 50
corrugation with probe 63

Sergey Vladimirovich asks:

What better pipe use for internal wiring in the apartment?

Technician's response:

• HDPE pipes (series 7) are characterized by an extended temperature range of installation and operation, have increased elasticity and are able to withstand significant shock loads, which makes this type of pipe popular with monolithic concrete construction or pouring screeds.
• PVC pipes (series 9) are the most common and popular type of pipes for electrical wiring. Corrugated PVC pipes have a low cost, while they do not spread combustion and comply with current fire safety requirements;
• . flexible corrugated pipes made of polypropylene (series 10) do not propagate combustion, comply with current fire safety requirements. Pipes are resistant to high and low temperatures, as well as have increased elasticity and impact strength, which allows the use of this type of pipes in monolithic concrete construction, if additional requirements are imposed on the monolithic pipes for compliance with fire safety standards (kindergartens, schools, etc. social facilities spheres.

Flexible corrugated pipes (corrugation) made of self-extinguishing PVC compound are designed for laying replaceable electrical wiring. For the convenience of cable pulling, corrugated pipes can be equipped with metal wire probes (pulling). Network wiring should be done with non-flammable or low-flammable cables (wires). Simultaneous pulling of several networks in one corrugation and laying of networks with a voltage of direct or alternating current of more than 1000 volts is not allowed.

One linear meter of a corrugated pipe (corrugation) should be fixed 3 pcs. fastening clips of the appropriate diameter. Avoid sharp corners during installation. The maximum number of angles when installing corrugated pipes with a length of 25 m is no more than 5. When laying corrugations with a length of more than 25 meters, mounting (junction) boxes should be used.

ambient operating temperature range— from -40°С to +45°С.
permissible ambient temperature during installation— from -5°С to +90°С.
heat resistance and fire resistance- according to GOST R 50827 (IEC 670-89).
platinum color- RAL 7035 (grey).
mechanical strength— 350N per 5 cm at +20°С.
specifications— TU 2247-001-58170273-2003.
probe (broach)- from steel wire of class 2 with a diameter of 0.9 mm in accordance with GOST 9389-75.
bending radius- 3 pipe diameters.
degree of protection against environmental influences— IP55 according to GOST 14254 (IEC 529),
while providing protection to other elements of the network.
shelf life- 2 years (in the manufacturer's packaging).

PVC has long ceased to be just the name of a chemical element. This polymer has become indispensable in our everyday life and construction. And pipes, which are mounted under the cable, a clear confirmation of this. After all PVC corrugated pipe is a truly indispensable building material for the described types of installation work.

Depending on the features pipe designs there are three types:

• superheavy;
• heavy;
• lungs.

The first is represented by a dense and reinforced structure. Such a product is used for laying wiring under the load of earth or concrete. In the first case, we are talking about burying the cable in the ground. And in the second - under concrete floors or asphalted transport highways. Often this type of pipe is used in construction to isolate the electrical network of important social facilities: schools, hospitals, kindergartens, maternity hospitals, and so on.

heavy pipes buried in the ground, but on a small layer. This product allows you to protect the wiring from moisture and harmful microorganisms.

Lungs are often used in the installation of wiring in buildings and residential buildings. The main task of such protective mechanisms is to protect the network from moisture and dust.

In construction, PVC corrugated pipes have various applications. However, the use as a protective tray for wiring is one of the advantages.

For such an application, it is very important to calculate everything correctly. It's about about the diameter of the section. In order to avoid accidents, it is important that the cable is located spaciously and does not touch or kink.

corrugated pipe is an excellent material for organizing protective measures that prevent:

• negative weather conditions;
• moisture ingress to wiring cables;
• household dust pollution;
• ingress of household chemicals (often detergent and abrasive);
• electric voltages up to 2 thousand volts.

Also, the polymer has a sufficient service life of five decades, has high environmental friendliness, is non-toxic and very practical. The increased flexibility of the building material allows you to lay the cable in any hard-to-reach places. This is very convenient for newly built buildings.

Such PVC have a fairly wide scope. In addition to the described use, they are used for the installation of water supply, sewerage and casing pipes.

All characteristics allow us to draw a conclusion about the significant benefits of using PVC corrugated pipes before other materials.