Small Flame Test - edit laser

Small Flame Test

Euroclasses include new test methods and classification categories of these products in relation to their reaction to fire applied at European level.

Euroclasses are the result of work undertaken within the European Commission for more than a decade. They form a unified system of methods and test parameters and limits for rankings values.

Construction products which are part of Euroclasses are either basic products, semi-finished or finished products manufactured with basic materials and commercialized on the market.

Furnishing materials don't fit with the DPC but they remain subject to the old French M classification.

Euroclasses ranking

Construction products are distributed between 7 Euroclasses A1, A2, B, C, D, E, and F according to their level of performance.

The rank for the flooring is FL. (floorings).

Euroclasses A (A1 or A2) and B correspond to the inert materials class (fuel or not) . They are the safest security against fire because they contribute little or nothing to the development of fire.

Euroclasses C, D and E correspond to classes of combustible and characterize the most dangerous. Euroclasse F includes products without any evaluation, or even without special fire performance that cannot permit to rank them.

Selection Criteria

Euroclasses take into account three main criteria  :

  • Fire development
  • Smoke emission
  • Flaming droplets production

 

Test methods

These test methods have been chosen to simulate the three steps of a fire development :

  • The ignitability by a small-time attack flame, such as a match or a lighter (scenario I)
  • The flammability and fire development of a product subject to a single burning item such as a wastebasket or a seat flaming up to flashover (Scenario II)
  • The flashover a product is subjected to evaluate its performance in the case of thermal loading highest simulating a fully developed fire in a room (scenario III)

To answer these three levels of thermal stress, five were selected to harmonize test methods in order to evaluate the reaction to fire of construction products (including 4 existed as ISO standards) :

  • The oven non-combustibility (NF EN ISO 1182) is used to identify products that contribute to a little or no development of fire cover classes A1/A1fl and A2/ A2fl (scenario III)
  • The calorimeter bomb (NF EN ISO 1716) is used to determine the calorific value of a product, and covers classes A1/A1fl and A2/ A2fl (scenario III)
  • The SBI test for "Single Burning Item" (NF EN 13823), semi-greatness, is to examine the contribution of a product to the development of a fire in a scenario simulating a Single Burning Item combustion (SBI) in the corner of a room recreated sections of specimens with the test product. This test covers the classes A2, B, C and D and is not suitable for flooring and is replaced by the European RPT (Scenario II)
  • The small flame test (NF EN ISO 11925-2) evaluates the ignitability of products subjected to thermal stress low and localized, simulated by a small flame. This essay serves as a "screening test" (test selection) covers classes B/Bfl, C/Cfl, D/Dfl, E/Efl and F/Ffl on failure (scenario I)
  • The European radiant panel (NF EN ISO 9239-1) has to determine the critical radiant flux for which a flame stops to burn on an horizontally surface constituted by a flooring. It covers classes A2fl, Bfl, Cfl and Dfl (scenario II)
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