柴油的规格标准和其他油料一样是判定它是否合格的依据。下表是轻柴油和专用柴油的规格标准的主要部分:十六烷值十六烷值表示柴油的发火性。它是在特定的机器中采取与标准燃料对比的方法测定出来的。例如十六烷值为45的柴油表示其发火性相当于含正十六烷(发火性极好)45%和a一甲基茶(发火性极坏)55%的标准燃料的发火性。十六烷值越高,发火性越好。柴油的发火性是指其 Diesel specifications and other fuel is the same as to determine whether the basis for compliance. The following table is the main part of the specification standards for light and specialty diesel oils: Cetane number Cetane number indicates fireability of diesel fuel. It is measured in a specific machine in comparison with a standard fuel. For example, a diesel fuel with a cetane number of 45 indicates that its ignitability corresponds to the ignitability of a standard fuel containing 45% of n-hexadecane (pyrophoricity) and 55% of a-methyl tea (pyrophoricity). The higher the cetane number, the better the ignitability. Diesel ignition is its