NF P 92-501 Fire Safety - Building Materials - Reaction to Fire Tests - Used for Rigid Materials or Flexible Materials Thicker than 5 mm

In the NF P92-501 standard, which is a French standard, fire test methods for building and decoration materials are defined and M classification criteria are explained.

The materials covered by this standard are as follows:

• hard building materials
• Hard substrate materials for flooring
• Flexible materials thicker than 5 mm
• Other building materials similar to those listed

The following two factors are important in the tests performed under this standard: the flame height applied to the samples and the burning time. While performing the tests, the product samples are mounted in a closed room at an angle of 45 degrees to the horizontal and exposed to thermal radiation (30 kW/m2) on their lowest surface. Test duration is 20 minutes. Normally, when the fire source is removed from the sample, the flame should go out.

According to this standard, the rating is made according to the fire test results as follows:

• M1 value is not flammable (0
• M2 value indicates low flammability (2.5
• M3 value indicates moderate flammability (15
• M4 value indicates flammability (q>50)

If specific and unusual sample behavior is observed during testing, additional complementary testing may be required. These tests are included in other French standards that are close to this standard and used for similar purposes:

• NF P 92-503 Safety against fire - Building materials - Reaction to fire tests - Electric burner test used for flexible materials
• NF P 92-504 Safety against fire - Building materials - Reaction to fire tests - Flame resistance test and flame propagation speed.
• NF P 92-505 Safety against fire - Building materials - Reaction to fire tests - Test used for thermal melting materials - Drip test
• NF P 92-507 Fire safety - Building - Interior equipment materials - Classification by reaction to fire

Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of NF P92-501 standard, between the fire reaction tests of building materials for hard materials or thicker than 5 mm. It also provides testing services for flexible materials.