Fire resistance

ISO 340 FIRE TESTING

The basis of most tests involves exposing a sample of belt to the flame of a burner causing it to burn. The burner (flame) is then removed and the combustion time (duration of flame) of the test piece is recorded. A current of air is then applied to the test piece for a specified time after the extinction of the flame. The flame should not re-ignite. The combined duration of continued burning (visible flame) should be less than 45 seconds for each group of six tests with no individual value being longer than 15 seconds. This factor is of critical importance because it determines the distance the fire can be carried by the moving belt.

Under laboratory test conditions, Dunlop fire resistant belting consistently self-extinguishes more than 6 times faster (in less than one second) than the permissible pass rate average time of 7.5 seconds.

A QUICK REFERENCE GUIDE TO DUNLOP FIRE RESISTANT COVERS

BV K/S: fire resistant for the transport of inflammable and explosive materials such as biomass and coal.

BVA K/S: Fire resistant for the transport of highly abrasive inflammable and explosive materials.

V/VT: fire resistant qualities specially developed for increased safety, such as covered or underground applications.

BVM K/S: fire and oil resistant for most products containing animal and vegetable oils.

BVR K/S: fire and oil resistant for products containing mineral oils.


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In this document, you can find information about fire resistance in conveyor belting.

ISO 340 testing


FEBRUARY 2019 | WORLD COAL

The World’s leading fire resistant conveyor belting manufacturer provides expert guidance on fire-resistant belting for both above and below the ground use. It contains the most comprehensive and up-to-date information on this important subject ever published.

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