During the installation of communication networks, HDPE pipe for cable is very often used as a protective sheath. It is often used when laying power lines. HDPE pipe very reliably protects the cable from the influence of stray currents, aggressive soil and mechanical damage. The cable installation technology depends on the location and purpose of engineering networks.
For laying power lines and other engineering communications, use different types HDPE pipes. They differ design features and technical parameters:
Depending on the specification of the product, it may be equipped with a probe. The probe is a special design designed to pull the cable inside the pipe. With it, you can reduce the time for laying communications and power networks.
In the absence of a probe, the cable is pulled using special reusable equipment. In this case, the complexity of the process increases somewhat, and there is also a need to purchase technical devices. In this case, HDPE cable pipes that do not have a broach can be used several times. This is especially true when frequent repairs communication systems.
Among the companies that produce HDPE pipes for cable laying, DKS is now the most popular. This manufacturer produces corrugated pipes "Octopus", which are used to install hidden wiring inside the building. In addition, DKS manufactures various boxes and accessories that allow the installation of communications in full compliance with the established rules.
Compared to protective metal covers, HDPE cable pipe will cost the owner much less. This is evidenced by the fact that it is not necessary to use products manufactured in accordance with the requirements of the state standard for laying power lines and other communications. For these purposes, production from secondary raw materials is quite allowed. Technical HDPE the pipe is made from industrial waste mixed with various polyethylene additives. This slightly changes the performance and color of the product, but makes it possible to significantly reduce manufacturing costs, thereby lowering the cost.
In addition, polyethylene communication pipes low pressure have the following advantages:
The cable inside the HDPE pipe can be laid along any necessary path without the use of connecting elements, because the polymer bends very well. Particularly, it is easy to modify the design of products with small diameters. In this case, you should not bend the HDPE pipes very strongly, because because of this, a hall can arise and the cable cannot be pulled.
The technical features of installing HDPE pipes depend on the conditions of its use and the location of the cable. These characteristics affect the list of equipment used and necessary elements constructions.
Indoor electrical cable, closed by a pipe HDPE is laid using the following technology:
With the help of a HDPE pipe, you can shorten the length of electrical wiring and carry out cable hauling and repair work without the likelihood of damaging the surface of walls and ceilings.
When installing communications inside the building, you can use different kinds connecting parts for fastening individual elements of the protective case: couplings, bends and other accessories. However, the most in demand are elements with a corrugated surface for turns in the places where the structure passes through the floor slab or transitions between different planes. In this case, the polyethylene pipe can be bent even at right angles, which cannot be done without the use of additional structural elements. According to the current instructions for installing hidden electrical wiring, which is located inside walls or floors made of non-combustible materials, it is allowed to use corrugated and smooth HDPE pipes.
This technology is very much in demand when laying communications in private houses and dachas. Before starting work, you need to carefully inspect the cable and check the integrity of the protective casing. In case of damage to the shell, the protective function polyethylene pipes will lose its meaning.
To quickly find the location of the cable, a special signal tape can be laid over it.
When using HDPE pipes for laying power networks underground, it is advisable not to use couplings and other connecting elements, because this can worsen the sealing of the system. Do not forget that the use of fittings when bringing the cable into the building is mandatory. For straight cable routing, it is best to use solid parts with a cross-sectional diameter of more than 4 millimeters. In the event that the section is too long, then to tighten the electric cable, you need to use an elastic metal wire or a special nylon broach. Initially, they are run inside the pipe, and then the tied cable is tightened.
For laying an electric cable located in places with difficult accessibility, trenchless laying technology is used. Most often it is used by utilities, because it is performed using special equipment and sophisticated technology. The essence of this method of cable laying is horizontal drilling, which makes it possible to lay communications underground without disturbing the surface layer of the soil. Initially, the composition of the soil is studied, after which it is necessary to obtain permission to carry out such work. After that, the installation of the cable in the HDPE pipe begins, which includes the following steps:
The main disadvantage of the technology of horizontal directional drilling of the earth is the complexity of the process, therefore, when carrying out such work, it is necessary to conclude an agreement with specialized organizations that have a staff and necessary equipment to carry out such work.
Laying the cable with the protection of low-pressure polyethylene pipes provides reliable protection of the communication system for a long time, but do not forget about the installation instructions, because even a little negligence can nullify all the work.
When choosing a product, be sure to pay attention to two characteristics of the pipe: the diameter of the pipe and its type.
The diameter of the inner section of pipes must be at least one and a half times the outer diameter for cables with stranded conductors and two times the outer diameter for cables with single-wire conductors.
In each of these cases, for cables up to 10 kV, pipes with an inner diameter of less than 50 millimeters with a length of up to 5 meters and less than 100 millimeters with a longer structure cannot be used. For example, if you need to lay a cable with a small cross-section at a distance of 6 meters, then you need to use pipes with a diameter of more than 100 millimeters. When designing networks of particular importance, it is recommended to use double-walled HDPE pipes with a diameter of 110 millimeters, even in cases where some sections are less than 5 meters in length. Although this results in unnecessary costs, since pipes with a smaller diameter and their installation are cheaper, this gives confidence in the reliability and durability of the system.
And the electrical wiring inside the house requires additional insulation, which will protect the cable from external influences, and residents from electric shock if its insulating layer is damaged. HDPE pipe for cable copes well with this task. In this article I will talk about the features of these products, the existing varieties and different ways styling.
HDPE pipes are used as protective sleeves for cables laid in an open, hidden and semi-hidden way when installing:
When performing electrical work, HDPE pipe is highly popular for a number of reasons:
The service life of HDPE pipes for cable is at least 50 years.
Requirements to technical specifications cable ducts made of HDPE pipes are regulated by GOST 32126.1–2013. Recyclable material grades must correspond to:
The outer surface of a technical HDPE pipe should be smooth, without noticeable delamination, cracks, chips and bubbles. The inner surfaces of the products should not have bumps and protrusions that impede the wire pulling.
Polyethylene pipes are sold in sections 5–12 meters long or in bays of 25, 50, 100, 200 meters.
Marking is applied by the manufacturer on the outside of the HDPE pipe along its entire length in 1 meter increments. It consists of the following designations:
I give an example of a typical marking: PE63 SDR 11 - 40 * 2 technical GOST 16338-85.
Manufacturers offer HDPE pipe for installation of cable channels in two versions:
These types of tubular products differ in technical characteristics and are used for operation in different conditions.
Smooth HDPE pipes are black, rigid, and have high mechanical strength. They are:
For turns, transitions in cable ducts made of smooth HDPE pipes, special fittings are used.
Polyethylene corrugated pipes are used for the construction of both surface and underground communications. They have a two-layer wall, in which the inner layer is smooth, made of LDPE, and the outer corrugated layer is made of HDPE. Can be supplied with or without an internally mounted probe.
According to their ability to withstand external pressure, they are divided into:
Depending on the purpose, they are painted in different colors:
HDPE corrugated pipes are distinguished by excellent flexibility, withstand heavy loads, therefore they can be used for laying curved highways and placed at different depths.
HDPE pipes for cable protection have the following advantages:
The disadvantages include the ability of HDPE pipes to maintain and spread combustion. Therefore, they must be embedded within fire-resistant materials such as concrete screed, cement mortar, or buried in the ground.
The determining factors when choosing HDPE pipes for cable should be the following indicators:
The technology of laying protective sleeves from HDPE pipes has features depending on the location of the cable and the conditions of its operation.
The general rules for all installation methods are as follows:
Installation of cable channels inside buildings is carried out in the following order:
In many cases, underground electrical cables are preferable to aerial routes. In the ground, it will be protected from atmospheric precipitation, icing and gusts of wind, inaccessible to thieves of non-ferrous metals.
The very process of laying HDPE pipes for cables in the ground consists of the following actions:
So that in the future the paved route can be found, signal columns are placed above it. When installing the cable underground, fittings must not be used to connect the parts of the polyethylene pipeline. They can break its tightness.
In the cramped conditions of private yards or summer cottages, where it is not possible to dig a trench, the method of trenchless cable laying is used. For this, special equipment is used that allows drilling the soil in a horizontal direction. Before starting work, you need to issue a drilling permit and perform an analysis of the geological composition of the soil.
Trenchless cable laying is carried out in the following sequence:
Underground routes of electric cables and communication lines are subject to various threats - flooding, mechanical destruction during ground movements or pressure on the soil surface, the effect of stray currents. Although most cables are covered with durable layers of insulation and braid, additional protection necessary. In recent decades, HDPE pipes for cable have been used for this purpose, which you can purchase with delivery to Moscow by placing an order on the website or by phone.
From the entire range of tubular products, almost all articles can be used for cable laying. But two types meet the requirements the most - technical and electrical pipes. The first are smooth-walled black products, which are successfully used for free-flow pipelines. cold water... In the case of electrical installation technical pipe HDPE for cable laying is used if the lines pass through concrete screed or a brick wall. They are also very convenient for the installation of underground lines by the puncture method (HDD). In this case, the pipe is pulled into an inclined or horizontal well with a cable installed in it. The technology is quite complex and requires special equipment and highly qualified personnel. Smooth-walled rigid HDPE pipe with low SDR (up to 9) is ideal for cable laying at great depths - it withstands significant ground pressure and protects the cable from possible breaks.
In most cases, for underground and surface mounting of highways, an electrotechnical HDPE pipe is used for cable laying. It is two-layer - smooth inner (LDPE) and corrugated outer (HDPE). The inner one has minimal resistance to cable pulling. For this, a special steel or polypropylene cable is used - a probe. Standard HDPE cable conduit can be supplied with or without an internal probe. A HDPE pipe is produced for electrical purposes in accordance with GOST 16338 (marking 277, 276, 286, 273 and 271) or GOST 16337 you can recognize them by other markings, for example 0803-020. According to the standard, the product is divided into several types: heavy and light corrugated; double-walled; heavy smooth; halogen-free. They are distinguished, first of all, by their ability to withstand external pressure, which determines the possibility of installation at different depths. Lungs are designed for a pressure of no more than 0.25 MPa, medium - 0.4 - 0.6 MPa, heavy - up to 1 MPa. When ordering non-standard items, the allowable pressure limit is also selected. The mass of the pipe and its strength directly depend on the SDR indicator. For cable lines products with SDR from 7.4 to 26 are used, depending on the operating conditions of the future highway and the method of broaching. For the HDD method, you can take only products with a ratio equal to 7.4 - 11. Also, casings for various purposes differ in color: red - for high-voltage lines; blue - communications and telecommunications; black - general purpose.
Smooth HDPE pipes for cables are black, they are produced with a single-layer wall and are not reinforced. Some types of double-layer are reinforced, they are designed to operate in difficult conditions. The company "Promtekhkomplekt" offers a full range of electrical and water pipes made of polyethylene. You can buy HDPE pipe for cable in Moscow both in coils and in sections of the required length with delivery to the destination. We have the lowest price for HDPE pipes for cables - we cooperate with the five largest factories for the production of this type of product and receive goods at a special dealer cost. This allows not only to keep prices acceptable to the customer, but also to offer discounts and bonuses for regular partners and wholesale buyers.
Do you like the video? Subscribe to our channel!
Laying cables in the ground is a fairly popular way of installing lines, despite the high costs. Overhead lines are constantly exposed to various natural factors, especially in strong winds and icing. Renovation work on the lines lead to serious costs, and the damage from the downtime of enterprises left without electricity can be calculated in fantastic amounts. Trenching also has its own nuances, requiring the involvement of earth-moving equipment and additional protection from accidental damage. Today, pipes are increasingly used for laying cables in the ground, protecting from the effects of rodents, high humidity, mechanical impact. The use of pipes is regulated by SNiPs and GOSTs; for each type of cable, its own types of these products are recommended. So, for laying the power cable, you cannot use steel pipes, but for the control cable they are quite suitable.
For a long time, only steel and asbestos-cement pipes were used to protect the cable laid in the ground. The disadvantage of the first of them was the lack of protection in the event of cable breakdown. Asbestos-cement pipes are heavy, fragile and contain a mineral that is far from the safest for human health - asbestos. That is why with the advent of plastic pipes they have become the main material used in cable routing. Among their advantages:
Currently, pipes for laying cables in the ground are made from high or low pressure polyethylene, polypropylene and PVC. All of these materials have excellent performance characteristics... The use of pipes with different wall thicknesses, smooth or corrugated, allows you to select the optimal material for each specific type of cable. HDPE pipes for laying cables in the ground are very popular; they are produced in the following types:
In-ground corrugated conduits can be reinforced with steel wire for added strength.
In recent years, such products as for laying cables in the ground have proven their effectiveness. This system consists of a corrugated sheath made of HDPE and a smooth inner sheath made of HDPE. The pipe has a high ring stiffness, which allows it to withstand significant loads. The smooth inner wall makes cable installation as easy as possible, increasing the pace of work. Despite its two-layer structure, the corrugated 2-wall pipe for laying cables in the ground is lightweight, which greatly simplifies its transportation and laying in a trench. Installation of this type of pipe can be carried out in a wide temperature range, allowing it to work even in winter frosts. The two-layer pipe has a high resistance to ultraviolet light, aggressive chemicals, which expands the scope of its application, simplifies storage. Simple couplings without sockets are used for connection, which makes installation simpler, cheaper and more reliable. The service life of corrugated two-layer pipes is at least 50 years, but in practice it is much longer.
Equipping country cottage area, the owners have to solve many operational issues associated with the new construction. To live comfortably in country house, you will need to think about high-quality water supply systems, sewerage systems, as well as electricity. Laying cables in the ground in pipes is necessary to provide power to lighting fixtures, heaters and other household appliances... To independently perform this work, it is necessary to study the technology of its implementation. This will create a high-quality and durable system.
Not every site owner is satisfied with the air conduction of the cable system to the house. The underground version of the laying of power communications is gaining more and more momentum. They enter the house through the basement. Therefore, this type of work is performed even at the stage of laying the foundation.
A plan for such an electrification is being developed even before construction begins. All cable branches are thought over. At this stage, the condition of the soil, the type of climatic zone and other aspects of the safety of the operation of the system are taken into account.
The laying of cables in the ground in pipes must be carried out taking into account existing requirements and regulations. When carrying out such work, it is necessary to take into account the norms of SNiP and PUE, as well as GOST. Carrying out all the necessary installation operations, be sure to comply with labor safety rules.
Laying cables in the ground in pipes (PUE, SNiP clearly regulate this process) requires the selection of the right materials. First and foremost, they must be safe. But their cost should also be acceptable. Today there are communications that do not need to be carried through pipes. These are armored cables. However, their cost is very high. Therefore, the trench installation method involves the use of a cheaper cable in special pipes.
A cable that runs underground must be marked with a self-supporting insulated wire. This variety allows you to apply all existing standards. However, it must be installed in a trench manner in a pipe. The track can be metal or plastic.
Made of plastic. They are quite durable and have a smooth surface. The DKC type corrugated pipe may only be used for internal works, for carrying out communications under a layer of plaster.
Laying cables in the ground in HDPE pipes, metal or metal-plastic varieties has a number of advantages. This protects the wire from adverse weather conditions, mechanical damage.
If you need to replace the conductor once, you can easily get the old cable and run a new one along the existing route. This technique allows you to follow the rules fire safety... This is especially important in wooden houses... A pipe designed for trench installation prevents sparks and overheating of surrounding materials.
The advantage of this system is additional cable protection. Thanks to the pipe, it will not be damaged by rodents, microorganisms. If the conductor is buried in the ground without such protection, moles can gnaw through it.
The laying of cables in the ground in pipes (photo is presented below) must meet a number of mandatory requirements. The depth of the conductor in the ground must be at least 70 cm. This indicator varies depending on the climatic zone.
The route must not be laid under the foundation. The cable should run no closer than 60 cm from it. The width of the ditch is selected in accordance with the number of conductors passing along the route. They should be located no closer than 10 cm from each other.
The trench is covered with sand and compacted to a level of 15 cm. Before arranging the route, it is necessary to consider the site plan. It is not allowed that pipes with electrical conductors pass closer than 1 m from gas or 2 m from water supply lines.
If brick is used to strengthen the transmission line (with significant soil subsidence), it should not be hollow. On top of the route, it is necessary to lay a tape with an inscription about the passage of a power cable here. Further, a layer of sand and earth with a slide is again poured.
Laying cables in the ground in HDPE pipes has a number of features. They must be studied before carrying out work. Initially, you need to complete a drawing of the route. The pipe must be fastened every 60-80 cm. For this, special brackets or clips are used.
To pull the cable through the pipe, use special broaches or metal wire. All elements of the track are connected using a special soldering iron. The cable should be connected inside using special couplings.
If the track is vertical, it is made with a slope. This will prevent condensation from collecting in it.
If you need to pull the conductor in wooden building, bath, it is better to give preference to This strong product. It can be galvanized or iron.
It should be noted that buried cables in DKC pipes are not permitted. They are used especially for indoor cable laying. Welding or threaded fittings can be used to connect the metal elements of the route.
When arranging such a system, grounding must be performed. The slope must be towards the pipes and the joints must be painted to avoid corrosion. For interior work, it is better not to use such structures. When the floor is poured with concrete, the painted surfaces will not adhere well to it.
The laying of the cable in pipes in the ground, the norms of which are regulated by the PUE and GOST, must be carried out responsibly. Connections in pipes are not allowed. This is done only in the most extreme cases and at the same time, special couplings are used.
It is better that such field connections are made in junction boxes... This is required
The track must not be bent more than 90 degrees. Otherwise, it will be impossible to replace the old conductor. The pipe joints must be additionally sealed. The inlet must be sealed.
The wire size must be selected according to the system load. Better to give preference to copper cable. Aluminum conductors are only applicable for interior work.
The correct laying of cables in the ground in pipes is quite simple on your own. However, you should take into account the advice of experts. They recommend using a track that is 3 times wider than the conductor itself.
If the winters in this climatic zone are very harsh, the soil may freeze by more than 70 cm. To prevent the pipes from deformed, they should be carefully fixed. But it's better if the track goes even deeper.
When developing a plan, avoid trenching under car parks, playgrounds, or garden paths.
Having familiarized yourself with such technology as laying cables in the ground in pipes, you can do this work yourself. Observing all safety requirements, you can create a high-quality, durable track. Its operation will be safe.
