Flame-retardant conduits are pipes specially designed to enhance the fire safety of circuits, with the following prominent characteristics:
Excellent flame-retardant performance: They are added with high-efficiency flame retardants (such as brominated and phosphorus compounds). When exposed to fire, they can inhibit the combustion reaction, slow down the spread of flames, and even self-extinguish, reducing the risk of fire expansion. Some models have passed certifications such as UL94 and GB/T 2408, maintaining structural stability in high-temperature environments and buying time for personnel evacuation and fire fighting.
Low smoke and low toxicity: They produce little smoke when burning, and the release concentration of toxic gases (such as carbon monoxide) is low, which can reduce the risk of suffocation caused by thick smoke and toxic gases in fires. They are especially suitable for use in crowded places (such as shopping malls, hospitals, and residences).
Strong basic protection: While having flame-retardant properties, they retain the protective functions of ordinary conduits. They can resist mechanical impact, moisture, acid and alkali erosion, protect the insulation layer of internal cables from damage, and avoid secondary fires caused by short circuits.
Wide adaptability: The materials include PVC, metal (such as galvanized steel), etc., with various specifications. They can meet the wiring needs of different scenarios such as strong electricity, weak electricity, and fire-fighting circuits, support installation methods such as surface mounting and concealed installation (buried in walls or underground), and are well compatible with accessories such as junction boxes and connectors.
Compliance guarantee: They meet the requirements of building fire protection codes for the fire resistance rating of pipelines. In high-rise buildings, public places and other areas with strict fire safety requirements, they are mandatory or preferred cable protection materials, adding an important line of defense for the safe operation of electrical systems.
Total Product Parameters
|
Parameter Category |
Specific Description |
|
Flame Retardant Grade |
Classified by GB/T 2408 into V-0 (extinguishes within 30 seconds after removing flame, does not ignite underlying materials) and V-1 (extinguishes within 60 seconds after removing flame); the mainstream is V-0 grade |
|
Material Type |
Mostly modified PVC (with flame retardants such as magnesium hydroxide, antimony trioxide added) or metal materials (e.g., galvanized steel) coated with flame-retardant layers |
|
Oxygen Index Requirement |
For plastic flame-retardant conduits, the oxygen index is ≥32%; a higher value indicates stronger flame retardancy, ensuring they are not easily combustible at high temperatures |
|
emperature Resistance Limit |
Short-term temperature resistance ≥100℃ (initial fire environment), long-term operating temperature -15℃~60℃, with excellent resistance to thermal deformation |
|
Smoke Density Rating |
Complies with GB/T 8323.2; Smoke Density Rating (SDR) ≤75, producing low smoke during combustion to reduce suffocation risks |
|
Applicable Scenarios |
High-rise buildings, machine rooms, distribution rooms and other places with high fire protection requirements; suitable for both exposed and buried installation, adapting to high-voltage/weak current lines |
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