What is meant by the flash point of fuel oil?
The flash point is the temperature at which the vapors of fuel oil, when mixed with the surrounding air, ignite upon contact with an open flame.
Fuel oil burned in the furnaces of steam boilers typically has a flash point in the range of 90–140 °C.
To prevent fire, the temperature to which fuel oil is heated in open storage tanks must be 10–12 °C below its flash point.
