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NF F 16-101/NF P 92-501: M classification combustion test
1. Standard –NF F 16-101/NF P 92-501
NF P 92-501: Building materials- Reaction to fire tests, radiation test used for rigid material or flexible materials thickness more than 5mm.
2. Test method—NF F 16-101/NF P 92-501
Specimens of the product are mounted in an enclosed chamber at an angle of 45° to the horizontal and exposed to thermal radiation (30kW/m²) on their lowest surface, the test duration 20 minutes.
The materials is classified M1 to M4 according to the q index
M1 - Non flammable q < 2.5
M2 - Low flammability q < 15
M3 - Moderately flammable q < 50
M4–flammable q≥50
If specific, unusual, specimen behaviour is observed additional supplementary tests (NF P 92-504 or NF P 92-505) may be required.
3. M Classification : M0-M4 (M0、M1、M1、M2、M3、M4)
All rigid materials and flexible materials thickness more than 5mm.
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Radiation heat test
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Flame spread rate |
The highest heat value (the total combustion heat value) |
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class |
＜2mm/s |
＞2 mm/s |
＜2.5MJ/KG |
＞2.5MJ/KG |
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No combustion |
M0 |
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M0 |
M1 |
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q＜2.5 |
M1 |
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q＜15 |
M2 |
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q＜50 |
M3 |
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q≥50 |
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M4 |
NC |
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4. 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
