Some goods, such as copra or coal, can spontaneously heat and catch fire, when stored in bulk. Under a standard Fire policy, damage to such goods is normally excluded, unless specifically requested. However, any damage resulting to other property from such a fire is covered.
An ignition caused by the accumulation of heat generated by the slow oxidation of coal in an air supply sufficient to support oxidation but insufficient to dissipate the heat. An example of where this can occur is a storage pile. The tendency of a coal to spontaneously combust or self-heat increases with increasing amounts of sulfur and moisture.
ignition of a substance (as oily rags) resulting from an internal oxidation process
Combustion of a thermally isolated material initiated by an internal chemical or biological reaction producing enough heat to cause ignition.
Combustion that occurs without heat being applied externally, usually through the slow oxidation of a substance which progressively raises its temperature.
Ignition of combustible material following slow oxidation without the application of high temperature from an external source.
Self-ignition of combustible material through chemical action of its parts.
Spontaneous combustion is the self-ignition of a material. Spontaneous combustion starts when oxidation occurs within a substance, which releases heat. If the heat does not escape from the material, and the temperature of the material rises above its ignition point, spontaneous combustion will occur.