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The difference between flame retardant cable and fire resistant cable?
Release time:
2020-01-03
It is very easy for ordinary people to confuse the concept of flame retardant cable and fire resistant cable. Timely flame retardant cable has many advantages suitable for use in chemical enterprises, such as low halogen and low smoke flame retardant. However, in general, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables.
It is very easy for ordinary people to confuse the concept of flame retardant cable and fire resistant cable. Timely flame retardant cable has many advantages suitable for use in chemical enterprises, such as low halogen and low smoke flame retardant. However, in general, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables. Their main thing is:
Difference between 1. principles
The principle between fire-resistant cable and flame-retardant cable is not the same. The principle of halogen cable flame retardant is mainly based on halogen flame retardant effect. The principle of flame retardant without halogen cable is to reduce the temperature of precipitated water to extinguish fire baking. Fire-resistant cable is to rely on the refractory layer of mica material fire resistance and heat resistance, so it can ensure that the cable in the event of a fire can also be normal work.
Difference between 2. structure and material
The structure and materials of fire-resistant cables are also different from those of flame-retardant cables. The basic structure of the flame retardant cable is:
(1) The insulation layer is made of flame retardant material.
(2) Fire retardant materials are used for sheath and outer protective layer.
(3) Flame retardant materials are used for wrapping and filling.
The fire-resistant cable is usually between the conductor and the insulation layer plus a fire-resistant layer, so theoretically can be in the structure of the flame-retardant cable plus a fire-resistant layer, the formation of both flame-retardant and fire-resistant cable, but the actual is not necessary. Because of the fire-resistant layer of the fire-resistant cable, the multi-layer mica tape is usually wound directly on the wire. It can withstand long-term combustion, even if the flame is applied to the polymer is burned, but also to ensure the normal operation of the line.
Flame retardant cable
3. flame retardant cable, halogen-free cable, fire-resistant cable clear concept and advantages and disadvantages
Flame retardant cable is characterized by delaying the flame along the cable ginger extension so that the fire does not expand. Because of its low cost, it is a large number of cable varieties used in fireproof cables. Whether it is a single cable or a bundle of laying conditions, when the cable is burning, the flame can be controlled within a certain range, so it can avoid major disasters caused by fire and delay, thereby improving the fire protection level of the cable line.
Halogen-free low smoke flame retardant cable is characterized by not only has good flame retardant properties, but also constitutes a low smoke halogen-free cable material does not contain halogen, low corrosion and toxicity during combustion, resulting in a very small amount of smoke, thus reducing the damage to personal instruments and equipment, and is conducive to timely rescue in case of fire. Although it has good flame retardancy, corrosion resistance, very little smoke concentration, etc. But its mechanical and electrical properties are slightly worse than ordinary cables.
Fire-resistant cable is mainly in the flame burning condition can maintain a certain period of normal use, to ensure the integrity of the line. Fire retardant cable burning when the amount of acid gas smoke less, fire retardant performance can be greatly improved. Especially when burning, accompanied by water spray and mechanical blow, the cable can still maintain the complete use of the line.
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