NFPA 258 固体材料发烟量测试方法
日期:2012-02-10 14:40
or other regulatory purposes.
1.1.2 Measurement is made of the attenuation of a light beam by the suspended solid or liquid particles - that is, smoke - that accumulate within a closed chamber. The smoke is due to either nonflaming, pyrolytic decomposition or flaming combustion of a relatively small sample of material. The radiant heat source is an electric furnace. NFPA 270, Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, ha
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10/30 14:44