Metal hose for cable: dimensions, technical characteristics, photo

The metal hose for the cable, the dimensions of which will be mentioned in the article, is a hermetic, flexible, corrugated high-pressure pipeline, which is manufactured using galvanized tape. With the help of this product it is possible to provide additional protection of the cable from electromagnetic radiation, kinks, cuts, squeezing, stretching and other environmental factors.

The technology of manufacturing these products is quite simple, which is why they are quite cheap, which means they are available to a wide range of consumers. In addition, such products will save on the possible repair of communication systems, which could be required if there was a network disruption.

Basic properties

A metal hose for a cable, the dimensions of which must be taken into account before purchase, has many positive features, among them it should be noted:

• Fire resistance;
• Radiation safety;
• Explosion safety;
• electrical safety;
• Chemical safety.

Application

All of the above qualities are manifested during operation, transportation and storage. Metal hose can be used under different conditions, while its walls can be affected by chemical and food substances, as well as petroleum products. Products do not lose their characteristics when exposed to temperatures from -200 to +700 ^o C, with the pressure may be 306 atmospheres.

If you also decided to purchase a metal hose for the cable, its dimensions should be chosen in accordance with the purpose. Since these products have a fairly wide distribution, their most popular sizes can be in the range from 6 to 200 mm. Used metal hose in construction, gas and oil industries, as well as other areas of human activities.

Specifications

The metal hose for the cable, the dimensions of which were mentioned above, are manufactured according to specifications. The products can be based on a steel zinc-coated tape or tape, enclosed in a polyvinyl chloride shell. In the latter case, the wall surface is black. You can purchase metal hoses with different degrees of protection. If you have an IP65 product in front of you, this indicates that the dust does not get inside during use. In this case, the cable will be protected from water jets, from whatever direction they come.

Temperature Range

It is important to consider the installation temperature. For a type of cable labeled P3-C, this value varies from -40 to +100 ^o C. If the cable is designated as P3-U-PVC, it can be stacked at a temperature range from -5 to +60 ^o C However, installation is also permissible at a temperature of 90 ° C. Operating temperatures vary approximately in the same range.

For the P3-C variant, this range ranges from -40 to +100 ^о С, whereas if the product has a PVC sheath, the range is reduced and will be equal to the limit from -25 to +60 ^о С. As for fire resistance, the data of the metal hose is not Support combustion.

Main Features

A metal hose for a cable, the size, photo of which you can find in the article, has some distinctive features, among them it should be noted:

• Additional protection of wiring from shock and mechanical damage;
• Perform the role of an additional screen;
• The presence of a shell of PVC;
• Implementation in the form of a bay;
• Possibility of use in production conditions where large-fraction bulk materials are to be transported.

Metal hose for cable, the technical characteristics of which were presented above, is often compared with products made of PVC and HDPE. The first of these three options benefits from the fact that it provides a high degree of protection of the wiring against shock loads and fire if a short circuit occurs. In addition, the products perfectly cope with the protection of internal contents from rodents.

Speech hose can also be a screen that will protect the cable from electromagnetic interference. The presence of polyvinylchloride shell provides insulation, which excludes ingress of water and dust. If you decide to purchase a metal hose for the cable, where this product is used, you should find out. This is discussed in the article, as well as about the main distinctive features. Among them, in addition, it should be noted that a convenient sale of products in coils, which can be used for installation work on the site.

It is important to take into account also the dimensions, for example, one bay may contain a metal hose, the length of which varies from 10 to 100 meters. The manufacturer indicates internal and external diameters, they vary from 7.8 to 78 and from 11.6 to 83 mm, respectively. The diameter of the conditional pass can be equal to the figure from 8 to 75 mm.

Design features

The metal hose is universal, so it can be used not only to protect cables and wires from moisture penetration, mechanical damage and adverse environmental effects, but also in the installation of air conditioning heating, air and local exhaust ventilation. If the hose is PVC-insulated, it can be used to protect against leakage current.

The metal hose for the cable, the photo of which we have placed in the review, is made of steel zinc-coated tape, which is sometimes covered with PVC insulation from the top, it can be gray or black, in the first case the product is non-flammable and has chemical additives, and these reduce the risk of fire .

On sale you can find metal hoses that do not support combustion, self-extinguish and have a plasticizer at the basis of insulation. Products in insulation are manufactured by the method of applying a sheath to a sealed metal hose, manufactured under the marking P3-CX. Metal hose requires protection from external damage. Before installation, it is checked for defects. Products should not bend more than the minimum radius.

Decoding of the marking

The metal hose for the cable, the description of which is presented in the article, is realized under a certain marking. If you see the following designation: P3-CP, then it says that there is a leaking sleeve in front of you, which is made of steel zinc-coated tape. It has a protective PVC coating, denoted by the letter P. When the manufacturer adds the alphanumeric designation ng-25, it indicates that the product will not support combustion, and when exposed to the fire itself it will die out. The figure indicates the diameter of the conditional internal passage in millimeters.

Mounting Features

Metal hose for cable (GOST R 51330) must be laid using a certain technology. If it is a question of internal works, it is important to carry out installation in view of preservation of aesthetic kind of internal space. However, most often such products are installed in garages, workshops, as well as cellars and warehouses. The cable can be located in an open or closed way.

To improve the ease of installation, use clamps that are fixed to the mounting surface by screws or nails. Sometimes for this, mounting clamps are used. Due to the fact that the metal hose does not act as a protection against the ignition of the wiring, a violation of the rules will be the installation of wiring on flammable surfaces and substrates, here include plastic and wood.

Power wiring can be laid in the hose only if it is surrounded on all sides by non-combustible material. It is important to exclude the accumulation of moisture and condensation on the surface of the product during installation. Protective fittings may be introductory and couplings. Different pieces of metal hose can be connected together by couplings. A metal hose can be put into a junction box, for this purpose, couplings are used, with the help of them it is possible to withdraw products into electrical equipment and switchboards.

Conclusion

Metal hoses have found their wide distribution for a variety of reasons. First, they can be used to effectively protect cables and wiring from mechanical damage. Secondly, such products are reliably protected in case of a short circuit from fire. Third, the sleeves have a high degree of flexibility, so they can be easily installed without using additional tools and accessories. Perform such a sleeve can as a screen from electromagnetic interference. In addition, the metal hose reliably protects the cable from undesirable kinks and rodents.