Ignition temperature/energy, fires

Table 5. Representative ignition temperatures, minimum explosion concentration, and minimum ignition energy for selected dusts, from NFPA Fire Protection Handbook (National Fire Protection Association, 1986) and other sources.

Powder inhibited paints present no less fire and explosive danger than liquid ones. Although the energy needed for their inflammation is ten times as high as that sufficient for inflammabie soivents, the LCIL of inhibited powder paints is rather low (in the main, 17-35 g/m ). Their self-ignition temperature (325-500°C) is close to that of the majority of organic solvents [17]. 

The course of a fire is quite characteristic. Occasionally, the effective burning is induced by a low-energy fire source acting for quite a long time. The critical point of fire propagation is the flash-over, when the temperature in the vicinity of the fire exceeds the ignition temperatures of any combustibles involved. At that point, they begin to burn rapidly. 

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