What is the difference between flame-retardant cable and fire-resistant cable?
- Classification:company news
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- Release time:2021-06-10
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(Summary description)It is easy for ordinary people to confuse the concept between flame-retardant cables and fire-resistant cables. Timely flame-retardant cables have many advantages that are more suitable for use in chemical companies, such as low halogen and low smoke flame retardant. However, under normal circumstances, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables. Their main point is:
What is the difference between flame-retardant cable and fire-resistant cable?
(Summary description)It is easy for ordinary people to confuse the concept between flame-retardant cables and fire-resistant cables. Timely flame-retardant cables have many advantages that are more suitable for use in chemical companies, such as low halogen and low smoke flame retardant. However, under normal circumstances, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables. Their main point is:
- Classification:company news
- Author:
- Origin:
- Release time:2021-06-10
- Views:0
It is easy for ordinary people to confuse the concept between flame-retardant cables and fire-resistant cables. Timely flame-retardant cables have many advantages that are more suitable for use in chemical companies, such as low halogen and low smoke flame retardant. However, under normal circumstances, fire-resistant cables can replace flame-retardant cables, but flame-retardant cables cannot replace fire-resistant cables. Their main point is:
1. The difference in principle
The principle is different between fire-resistant cables and flame-retardant cables. The flame-retardant principle of halogen cables mainly relies on the flame-retardant effect of halogen. The flame-retardant principle of halogen-free cables is to rely on the precipitation of water to lower the temperature to extinguish the fire. The fire-resistant cable relies on the mica material in the fire-resistant layer to resist fire and heat, so it can ensure that the cable can work normally in the event of a fire.
Second, the difference between structure and material
The structure and materials of fire-resistant cables are different from those of flame-retardant cables. The basic structure of flame-retardant cable is:
(1) The insulating layer is made of flame-retardant materials.
(2) Flame-retardant materials are used for the sheath and outer sheath.
(3) The wrapping tape and filling are made of flame-retardant materials.
The fire-resistant cable usually adds a fire-resistant layer between the conductor and the insulating layer. Therefore, theoretically, a fire-resistant layer can be added to the structure of the flame-retardant cable to form a flame-retardant and fire-resistant cable. There is no need for this. Because of the fire-resistant layer of the fire-resistant cable, a multi-layer mica tape is usually used to wrap the wire directly. It can withstand long-term combustion, even if the polymer at the place where the flame is applied is burned, it can ensure the normal operation of the line.
Flame retardant cable
3. The clear concepts and advantages and disadvantages of flame-retardant cables, halogen-free cables, and fire-resistant cables
The characteristic of flame-retardant cables is to delay the flame extension along the cable so that the fire will not expand. Because of its low cost, it is a large number of cable varieties used in fire-resistant cables. Regardless of whether it is a single cable or a bundle laying, the cable knows that the flame extension can be controlled within a certain range when it burns, so it can avoid major disasters caused by fire and extension, thereby improving the fire protection level of the cable line.
The characteristics of halogen-free low-smoke flame-retardant cables are that they not only have good flame-retardant properties, but also the halogen-free materials constituting the low-smoke and halogen-free cables have low corrosiveness and toxicity during combustion, and produce a very small amount of smoke, thereby reducing Damage to personal instruments and equipment is conducive to timely rescue in the event of a fire. Although it has good flame retardancy, corrosion resistance, and very little smoke concentration. But its mechanical and electrical properties are slightly worse than ordinary cables.
Fire-resistant cables are mainly used for a certain period of time under flame burning conditions to ensure the integrity of the circuit. When the fire-resistant and flame-retardant cable burns, there is less acid gas and smoke, and the fire-resistant and flame-retardant performance can be greatly improved. Especially when it is burning, with water spray and mechanical blow, the cable can still keep the circuit intact.
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