EN ISO 1182:2002 building materials noncombustible experiment with BS 476: part and the primary difference between 70
Test categories: fire test, construction materials noncombustible experiment
The main difference:
1. The sample size requirements
BS 476: part and the length and width of 70 (mm), high 50 + / - 3 mm, 80.0 + / - 5.0 cm3 volume
EN ISO 1182:1182 (mm) diameter, high 50 + / - 3 mm, 76 + 8 cm3 volume 2. State regulation requirements
BS 476: part 4:19 70 adjustment within 60 + / - 5 ℃ ventilation drying oven for 24 h
EN ISO 1182:1182 adjustment within 60 + / - 5 ℃ ventilation drying oven for 20 h to 24 h
3. The number of thermocouples
BS 476: part 4:19 70 2 root (sample center, furnace)
EN ISO 1182:1182 3 root (sample center, furnace, and sample surface)
4. The temperature stability requirements
BS 476: part 4:19 70 furnace temperature stability in 750 + 10 ℃ for at least 10 min.
EN ISO 1182:1182 the average temperature in the furnace is stable in 750 + 5 ℃ for at least 10 min. The temperature drift (linear attenuation) in this less than 2 ℃ within 10 min, within 10 min deviation from the average temperature 10 ℃ should not exceed the maximum temperature difference
5. Determine the experiment is complete
BS 476: part 4:19 70 for 20 minutes
EN ISO 1182:1182 within 30 min when measured by all the thermocouple temperature within 10 min in less than 2 ℃, argues that to achieve the final temperature balance, test will be stopped. If the temperature of the thermocouple is in 30 min did not reach the final temperature balance when, should continue to test; At the same time every 5 min to check the final equilibrium temperature. When the temperature of the thermocouple has reached the final balance or test has been 60 min, stop the test, and record test duration. Then, samples are taken from the furnace. The end of the last 5 min interval time or 60 min is the end of the test.
6. Incombustible material conformity assessment criterion
BS 476: part 4:19 70
Specimen center highest temperature relative to the initial temperature of furnace temperature 50 ℃ or less, and
The highest temperature in furnace relative to the initial temperature of furnace temperature 50 ℃ or less, and
Flame duration 10 s or less
EN ISO 1182:1182
A1 level (EN 13501-1:07) the highest temperature in the furnace relative to the final equilibrium temperature in the furnace of delta T temperature 30 ℃ or less, and the quality loss delta m 50% or less, and the flame duration tf = 0 (no) continue to burn
A2 level (EN 13501-1:07) the highest temperature in the furnace relative to the final equilibrium temperature in the furnace of delta T temperature 50 ℃ or less, and the quality loss delta m 50% or less, and flame duration tf 20 s or less
