Experimental Principle of Liquid Closed Flash Point Test

Experimental principle of liquid closed flash point test

When the liquid is heated and the temperature continues to rise, the concentration of vapor molecules increases.When the concentration of vapor molecules increases to the lower limit of explosion, the mixed gas formed by the saturated vapor of combustible liquid and air will go out in a flash when it encounters a fire source. This kind of instant burning phenomenon is called flash combustion. Under the specified experimental conditions, the lowest temperature corresponding to the flash on the surface of the liquid is called the flash point of the liquid.

At the flash point temperature, the liquid can only flash but not keep burning. This is because at the flash point temperature, the vaporization rate of the flammable liquid is lower than the combustion rate, and the vapor burns out above the surface of the liquid, and there is no time to replenish the vapor, soor the flame extinguishes itself. From a fire protection point of view, flashing is the warning of fire danger and the prelude to fire. Controlling the flash burn phenomenon can prevent fires or reduce the damage caused by fires.

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