scope:

This International Standard specifies a method for the estimation of the net heat of combustion of aviation fuels, in megajoules per kilogram or British thermal units per pound. It is not applicable to pure hydrocarbons. The method is purely empirical and is applicable only to liquid hydrocarbon fuels which conform to the requirements of specifications for aviation gasolines, or aircraft turbine and jet engine fuels of types Aviation turbine fuel, wide cut; Aviation turbine fuel, high flash; and Aviation turbine fuel, kerosine. The method is intended for use as a guide in cases where an experimentally determined heat of combustion is not available and cannot be made conveniently, and where an estimate is considered satisfactory. It is not intended for specifications and similar purposes, that estimated values of the net heat of combustion shall be used in place of experimentally determined values.