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EN ISO 5658-2 testing for flame spread
Published:2013-10-17 13:31:01   Read:

EN ISO 5658-2 Reaction to fire tests-spread of flame-Part 2: Lateral spread on building products in vertical configuration

EN ISO 5658-2 Test method
Lateral flame spread is determined on vertically oriented specimens using a rectangular radiant panel and an additional gas burner flame as the ignition source. The assessment is based on the CFE-value. The CFE-value (Critical Heat Flux at extinguishment, expressed in kW/m2) is the incident heat flux at the specimen surface at the point along its horizontal centreline where the flame ceases to advance and may subsequently go out. The CFE-value is determined by measuring the maximum spread of flame (in mm) and relating this value to the corresponding heat flux value from the heat flux profile curve ( which is based on measurements with a non-combustible calibration board.

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