Requirements of Heat for combustion

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Fire is an oxidization process of combustible materiel in the presence of heat , the requirement of heat for different materials differs with their physical nature . combustion will occur or continue only with the attainment of the required temperature. Hence it become necessary to know the flash point,fire point,spontaneous ignition temperature of a substance.

 Flash point: It is the lowest temperature at which there is sufficient vaporization of the substance produce   a vapor which will flash momentarily when a flame is applied. 


Fire point:  It is the lowest temperature at which the heat from the combustion of a burning vapor is capable of producing sufficient vapor to enable combustion to continue.



 Spontaneous ignition temperature: It is the lowest temperature at which the substance will burn with out the introduction of a flame or other ignition source .This implies that under certain conditions some materials undergo spontaneous ignition.

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