起源の場所:
中国
ブランド名:
YUYANG
証明:
CE
モデル番号:
YYF015
BS 476 part 6 specifies a method of test where the result is expressed as a fire propagation index, providing a comparative measure of the contribution to the growth of fire made by an essentially flat material, composite or assembly. This equipment is primarily intended for the assessment of the performance of internal wall and ceiling linings.
During testing, the specimen is exposed to a tubular torch with a heat release of 530J/S. After 2 minutes and 45 seconds, two electric heaters are adjusted to 1800 watts total. Five minutes after test initiation, power is reduced to 1500 watts and maintained until test completion, with a total test duration of 20 minutes.
The apparatus assesses flame propagation properties by continuously recording chimney temperature and room temperature difference using thermocouples. Results are compared with calibration curves based on asbestos-cement slab density measurements. Temperature differences are recorded at 30-second intervals for the first 3 minutes, 1-minute intervals for minutes 4-10, and 2-minute intervals for minutes 11-20. Flame spread indices for these three periods are calculated according to standard formulas.
The final index (I) represents the sum of the three period flame spread indices. Higher I values indicate lower material flame retardancy, with grade 0 materials having I ≤ 12.
BS 476 Part 6 A1: 2009
GB/T 17658-1999
| Specification | Details |
|---|---|
| Electrical | 230 volts Nominal 10 Amps |
| Ambient Temperature | Operating 10°C to 35°C |
| Gas Supplies | Standard test gas G112, as specified in BS 4947 |
| Flow | Gas flow for burner adjustable from 0 to 5 nl/min |
| Pressure | 1kPa |
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