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Reference.org
Fire point
open-in-new
<p>The fire point, or combustion point, of a <a href="/facts/Fuel/H8DIRL1j">fuel</a> is the lowest temperature at which the liquid fuel will continue to burn for at least five seconds after ignition by an open flame of standard dimension. At the <a href="/facts/Flash_point/97JQP35E">flash point</a>, a lower temperature, a substance will ignite briefly, but vapour might not be produced at a rate to sustain the fire. Most tables of material properties will only list material flash points. In general, the fire point can be assumed to be about 10 °C higher than the flash point, although this is no substitute for testing if the fire point is <a href="/facts/Safety-critical_system/vhVc7NJU">safety critical</a>. </p><p>Testing of the fire point is done by <a href="/facts/Cleveland_open-cup_method/z4mhH8g0">open cup apparatus</a>. </p>