Flexible Fabricated Products
Cable Fire Blanket
Code prefix CFB
Cable fire blankets are made from a combination of high- and low-temperature resistant fireproof and thermal insulation materials, with an inner liner, a middle layer and an outer protective layer. Design and fabrication are targeted to the required fire resistance duration and the place of use, and the product can be installed on site. It is suitable for the protection of fireproof cable trays, communication cables and optical cables.
- Continuous
- 750°C
- 1382 °F
- Short peak
- 1000°C
- 1832 °F
- Construction
- Unreinforced
- CFB
Spec sheets are issued against the confirmed grade, with the test method named on the report.
01 — Product description
A sewn assembly, tested as an assembly
Cable fire blankets combine high- and low-temperature resistant fireproof and thermal insulation materials in one sewn build: an inner liner, a middle layer and an outer protective layer. Design and fabrication are targeted to the fire resistance duration the installation requires and to the place of use, and the finished blanket is installed on site. The intended duty is protection of fireproof cable trays, communication cables and optical cables.
Samples completed a 90-minute fire resistance test at the National Wire and Cable Quality Supervision and Inspection Centre: 750 C fire supply for 90 minutes with 8.7 kV energised, 8.7 kV applied for 15 minutes after the fire stopped, and 30.5 kV applied after 15 minutes of cooling. Explosion-proof variants have also passed an arc ignition test, where the blanket remained intact with no perforation and no explosive debris splashed inside.
| Property | Value |
|---|---|
| High-temperature resistance | 1000 C short-term |
| Low-temperature resistance | -70 C |
| Breakdown voltage | 20 kV |
| Outer layer breakdown voltage | 3 kV |
| Dielectric constant | 3.14 |
| Volume resistance | 5.9×10¹³ Ω·cm |
| Linear shrinkage | 3.6 % at 1200 C |
| Base material | Class A1 non-combustible, asbestos free |
Product performance
- Temperature range: high-temperature resistance 1000 C short-term, low-temperature resistance -70 C.
- Resistant to insects and mildew.
- Non-combustible material.
- Aging resistant and weather resistant.
- Waterproof surface.
- Base material of Class A1 non-combustible material.
- Surface is washable and the blanket is asbestos free.
Product characteristics
- Thermal insulation performance.
- Detachable and installable for inspection and maintenance.
- Reusable multiple times when not subjected to fire.
- Has strength and can be bent and wrapped.
- Non-standard sizes customised to the fire protection arrangement.
- Adapts to cables and optical cables of different temperatures, diameters and combinations.
Main applications
Fire protection for computer rooms, equipment, robot cables and optical cables.
Working condition suitability and restrictions
The blanket is suitable for dry static cable protection. 1000 C is the short-term tolerance temperature and long-term continuous operation at this temperature is not permitted. It is not suitable for strong acid or alkali corrosion, long-term liquid immersion, high-speed medium erosion or continuous direct open flame burning. Humid environments will change the insulating electrical parameters.
Usage precautions
- During installation and removal, pull open along the opening direction; rough operation is prohibited.
- Cutting and processing generate fiber dust; maintain ventilation, wear dust-proof protective equipment and dispose of waste under local environmental regulations.
- Electrical parameters are measured on dry laboratory samples; humid and dusty site environments will change electrical performance.
- Each parameter represents laboratory sample test results and does not mean every finished product automatically achieves them.
- All technical data are for reference only; users should carry out their own suitability testing and comply with relevant safety regulations and standards.
02 — Characteristics
Multi-layer build
Inner liner, middle insulation and outer protective layer, selected for the fire resistance duration of the application.
Documented fire test
Samples completed a 90-minute fire resistance test at the National Wire and Cable Quality Supervision and Inspection Centre: 750 C fire for 90 minutes with 8.7 kV energised, 8.7 kV for 15 minutes after the fire stopped, and 30.5 kV after 15 minutes of cooling.
Dielectric performance
Breakdown voltage 20 kV, outer layer breakdown voltage 3 kV, dielectric constant 3.14, volume resistance 5.9×10¹³ Ω·cm.
Reusable and serviceable
Detachable and reinstallable for inspection and maintenance, and reusable when not subjected to fire.
03 — Typical properties
Values typical, confirm against duty
| Test item | Value | Note |
|---|---|---|
| Temperature | Low limit -70 C | |
| Base material | Asbestos free | |
| Breakdown voltage | Outer layer 3 kV | |
| Dielectric constant | Laboratory, dry | |
| Volume resistance | Laboratory, dry | |
| Linear shrinkage | Material test | |
| Fire test | 8.7 kV energised |
04 — Standard sizes
| Product code | Dimensions |
|---|---|
| CFB-STD | Standard blanket, to cable tray or joint size |
| CFB-EXP | Explosion-proof grade, arc ignition tested |
| CFB-CUSTOM | Non-standard, made to the fire protection arrangement |
05 — Where it is used
- Fireproof cable trays
- Communication cables and optical cables
- Computer rooms and equipment cables
- Robot cable runs
- Cable joints and penetrations
Service limits
- 1000 C is the short-term tolerance temperature; continuous operation at this temperature is not allowed.
- Suitable for dry static cable protection only: not for strong acid or alkali, long-term immersion, high-speed media erosion or continuous direct open flame.
- Humid environments change the insulating electrical parameters, which are measured on dry laboratory samples.
- Each figure represents laboratory sample results and does not mean every finished product automatically achieves them.
Related materials
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Cable Fire Blanket
CFB