Why should the cable be painted with fireproof soil? How to brush fire retardant coatings?
- Categories:Trade News
- Time of issue:1560303660000
Why should the cable be painted with fireproof soil? How to brush fire retardant coatings?
- Categories:Trade News
- Time of issue:2019-06-12 09:41
Cable fireproof coating is a kind of fireproof. According to the national standard "GB cable fireproof coating", cable fireproof coating refers to coating on cable (such as rubber, polyethylene, polyvinyl chloride, cross-linked polyethylene and other materials as conductors and Sheathed cable) surface, fire retardant coating with fire retardant protection and certain decorative effect.
Cables in power plants, industrial and mining sites, etc., may cause a decrease in the amount of load on the cable due to excessive temperature rise, or a short circuit due to a significant decrease in the strength of the insulation layer and cause a fire accident. Cable fire retardant coatings are a very effective measure to prevent the spread of cable fires. Cable fireproof coating is a kind of fireproof coating. According to the national standard "GB cable fireproof coating", cable fireproof coating means coating on cable (such as rubber, polyethylene, polyvinyl chloride, crosslinked polyethylene and other materials as conductor). And sheathed cable) surface, fire retardant coating with fire retardant protection and certain decorative effect.
Why should the cable be painted with fire retardant paint?
First, the use of cable fire-retardant coatings on cables ensures that the cables are not flammable or flame-retardant in the flame and can be thrown to normal operation for a certain period of time. After the fireproof coating of the cable is subjected to the fire, the carbonized layer can be formed to prevent the fire from being burned inward, which can protect the cable line.
Second, brushed cable fire retardant coatings are more energy efficient and more convenient to construct than other protective measures. Because of the small thickness and good heat dissipation of the cable fire-retardant coating, according to the experiment, the influence on the cable current capacity is small and can be ignored.
When the entire power cable is laid in the fire box or the fire bridge, the current capacity of the power cable will decrease.
Therefore, in the project, the fire-retardant coating fire-retardant coating is less expensive than the laying of the fire-proof bridge in the fire-proof bridge, and the engineering cost is reduced, which is more economical.
Therefore, in the project, the application of the fireproof coating is lower than the energy consumption in the tank box and the fireproof bridge, and the engineering cost is reduced, which is more economical.
Third, the paint fireproofing material is a method that can effectively prevent the vertical spread of the fire.
Cables are generally laid in pipelines where chimneys should be produced in fires, especially for tall buildings. If the cable does not take fire prevention measures, it is easy to spread the fire and form a large area of combustion. Therefore, the flame retardant properties of the cable are concerned with the spread of fire.
How to brush fire retardant coatings?
First, the dust, oil, and debris on the surface of the cable should be cleaned and polished before the construction of the fireproof coating. After the surface is dry, the fireproof coating can be applied.
Secondly, the construction of this product adopts spraying, brushing and other methods. When used, it should be fully stirred evenly. When the coating is slightly thick, it can be diluted with appropriate amount of tap water to facilitate spraying.
Third, before the construction and before the coating is dry, it should be waterproof, anti-exposure, anti-pollution, anti-moving, anti-bending, and repair if damaged.
Fourth, for wire and cable of plastic and rubber outer skin, it is generally applied directly for more than 5 times. The thickness of the coating is 0.5-1mm, and the dosage is about 1.5kg/m2. For insulated cables packed with oil paper, a layer of glass fiber should be wrapped first. Cloth, if it is painted, if it is applied outdoors or in a humid environment, it should be equipped with a matching varnish.
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