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NF F 16-101/NF X 10-702: Smoke density
1．Standard -- NF X 10-702
NF X 10-702: Fire test methods-Smoke emission-Test of measurement of specific optical density of smoke by the combustion or the pyrolysis of solid materials.
The smoke density measurement taken from a material under fire conditions gives an indication of the visibility through the smoke, this is important as reduced visibility makes it more difficult to escape from a fire hence increasing the threat to human life from the toxic gases, flames and heat.
one specimen is tested in the flaming mode (25kW/m2 radiant heat with a pilot flame) and one specimen is tested in the non-flaming mode (25kW/m2 radiant heat without a pilot flame).
Two values are determined from the test results:
• ‘Ds max’ –Maximum smoke density measured during the test
• ‘VOS4’ – A measure of the rate at which the smoke developed during the tested
2. NF X 10-702 for assessing F classification (smoke density and toxicity)
According to NF X 70-100 and NF X 10-702 results of two tests to assess the toxicity of F-class level of F0-F5 smoke six levels (F0, F1, F2, F3, F4, F5)
|
Class |
Value of S.I. |
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F0 |
≤5 |
|
F1 |
≤20 |
|
F2 |
≤40 |
|
F3 |
≤80 |
|
F4 |
≤120 |
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F5 |
＞120 |
3．NF X 10-702 test methods
NF X 10-702: Fire test methods-Smoke emission-Test of measurement of specific optical density of smoke by the combustion or the pyrolysis of solid materials.
NF X 70-100: Fire behaviour tests –Analysis of pyrolysis and combustion gases-Pipe still method.
NF F 16-101: Railway rolling stock fire behaviour choice of materials
NF F 16-102: Railway rolling stock fire behaviour choice of materials-Electrical Equipment |
Testing to：
Fire standard
