NFP92-501/NF P 92-501: M classification combustion test

1. Standard –NFP92-501/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—NFP92-501/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.

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

NFP92-506: Fire safety, Building materials, Reaction for fire tests, Radiant panel test for flooring

NFP92-507: Fire safety, Building materials, Construction and furnishing materials –Classification according to reaction to fire.

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