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NF P 92-504: speed of spread of flame test
NF P 92-504: speed of spread of flame test used for the materials which are not intended to be glued on a rigid substrate.
NF P 92-504 for the determination of horizontal flame spread rate of materials. This method also applies in other rapidly melting and testing without burning, or not achieve M1 ~ M3 material.
If for NF P 92-501 and NF P 92-503 testing, if the material does not burn, or just burning time is less than or equal to 5 seconds, but the emergence hole, you need the trial material to its fire resistance test classification. The fire resistance test process, the flame does not last more than two seconds, and no burning drops melt down situation.
NF P 92-504 testing requirements: the sample is placed horizontally (ie, the level of short side of the long side vertical and horizontal), counting from the free end, respectively, 50mm and 300mm in the office to tag, test, put the flame with a gas burner at the free end. If the test sample is then put out the fire burning time from the free end 10 times, each 5S; If the test sample flame spread rate of fire is the length of time imposed for the 30S, Determination of flame propagation of the two marker lines the time between t, according to the formula V = 250 / t calculated flame propagation rate, and thus on the material classification.
Other Standard
NF P 92-501: Building materials- Reaction to fire tests, radiation test used for rigid material or flexible materials thickness more than 5mm.
NF P 92-503: Electrical burner test used for flexible materials thickness no more than 5mm
NF P 92-504: speed of spread of flame test used for the materials which are not intended to be glued on a rigid substrate.
NF P 92-505: Dripping test with electrical radiator, used for melting materials.
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Testing to：
Fire standard
