PND: deciphering the abbreviation. HDPE pipe

More recently, such material as HDPE has gained its popularity. The deciphering of this abbreviation is as follows: low pressure polyethylene. From it, pipes are made, and the technology of screw extrusion of continuous type is used. The method allows you to get products that have unique characteristics.

Features of HDPE pipes

Pipes are ideal for transporting liquids, as well as gases. They are actively used when necessary to protect the cable, laid under the earth's thickness. This application is due to the fact that HDPE has rigidity and strength. In addition, low-pressure polyethylene is resistant to external, including atmospheric, impacts. The material can be used for laying external and internal sewage systems.

Another advantage of HDPE pipes (decoding - low pressure polyethylene) is a low cost, which is due to the fact that the production uses recycled materials. Thus, the production of the described pipes helps to preserve the ecological situation, since secondary resources do not enter the external environment in the form of waste. Pipes made of HDPE can have a variety of diameters, which allows them to be used in all kinds of areas.

Advantages of HDPE pipes

The HDPE pipe (the decoding is already known to the reader) has many advantages. In addition to the above, it is possible to allocate a rather long period of operation. For comparison, we can cite pipes made of steel, they serve 3 or even 5 times less than the HDPE products. The material is absolutely not afraid of chemical effects, as well as corrosion processes. When interacting with an aggressive environment, the pipes may not lose their abilities for a long time. They have an insignificant level of thermal conductivity, which is why there is no condensation on their surface.

The product of HDPE (deciphering the abbreviation, by the way, helps the consumer at the time of purchase) does not need cathodic protection when laying an electric cable. The walls of the pipes are sufficiently elastic, which is why there is no risk that the product will burst when it freezes inside the liquid. Transport, unload and stack these pipes is very convenient, because they have very little weight.

Classification of HDPE pipes

If you want to buy a quality HDPE pipe, then it is worth choosing the one that is made in accordance with GOST 18 599-83. Among such products can be the so-called heavy pipes, which are marked with the label "T". Products can be medium in weight, and also medium-light, in which case the manufacturer should designate them as "C" and "SL", respectively. If the pipe is made to order, then on it you will see the marking "Nest".

Types of HDPE products

The HDPE pipe (decoding - low pressure polyethylene) can be produced with corrugated or smooth walls. The last technical pipes have one layer, and they can be purchased in bays. An alternative version of pipes has a two-layer structure. On the outer surface, ribs are distinguished, which are designed to protect the inner layer from mechanical influences. Such products are often used in the installation of systems operated underground.

Application area

It is actively used in the arrangement of technical wells, and also, if necessary, to install the cable and wires of the HDPE pipe. Deciphering this value helps to understand that the product is based on high-strength plastic. Such products are actively used when working on external systems of pressureless sewage. They are quite common in the countryside and in the construction of private houses. They are popular among consumers who are going to arrange hidden installation of power grids, as well as those cases where the system is supposed to hide behind sheets of drywall, it can be concrete walls, as well as a raised floor.

ПНД-products - protection of an electric cable

There are many values of the definition described, and completely different in the HDPE decoding. Medicine, for example, gives its definition - a psychoneurological dispensary, which should not be confused with low-pressure poetyethylene.

Pipes made of low pressure polyethylene are also used in tandem with electrical cables. The pipe protects the cable from mechanical damage well. If the insulation of the cable is damaged, the pipe will protect the person from electric shock. In the event of the described emergency situation, a short circuit may occur which leads to fire, in which case the pipe will prevent the spread of the fire.

Specifications

Many people are interested before deciphering the PND-f. Experts know that this indicates that before you a pipe made of low-density polyethylene with a certain external diameter, which is indicated by the letter "f". Before buying it is important to pay attention not only to the material, but also to the characteristics that the product must match. Thus, if you want to purchase smooth pipes, then their surface should not have errors in the form of peelings, chips, bubbles, and also cracks. Do not overlook the inner surface of the pipes. This applies to technical and plumbing products. On the inner base there should be no hillocks and troughs, since they can become an obstacle in the passage of the cable.

The HDPE pipe, the decoding (diameter 110) of which is presented above, should be on sale in straight lengths. As for pipes whose diameter does not exceed 90 mm, they are realized in coils. If you need to purchase pipes in straight lengths, their length can be 5-12 m. But a deviation from this length is acceptable, which should not exceed 2%.

Stacking technology

ПНД-ф (the abbreviation can be interpreted as low-pressure polyethylene) can be laid in a wide temperature range. However, the smallest threshold should not be below -30 ° C. However, there are some limitations, they consist in the fact that foreign liquids, oil, mud and other substances are not allowed to enter the internal surfaces of the pipes. After stacking this, one should also not allow for what measures are being taken to seal and compact the elements in the interfaces.

In order to rid pipes of condensation, they must be installed with a certain slope, directed to the drawers used to collect moisture.

If there is a need to lay the pipe in the base of the building, then it is necessary to do this, laying the elements strictly horizontally. After the product is poured solution. If the products are not laid horizontally, the load on them will be distributed unevenly, which can cause damage. When laying pipes at a depth that exceeds 2 m, it is necessary to provide additional protection, consisting in concreting the channel. A suitable layer of concrete should not be made smaller or larger than 80-100 mm.

HDPE products are of low cost, but have high quality characteristics, this allows them to be used not only for laying sewerage and water supply systems, but also for protecting the cable that is mounted underground. The products are universal, as they are used for the arrangement of systems of external and internal arrangement, which allowed them to find a universal distribution, including for the installation of storm sewage.