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Note: New calculation improves estimating minimum flash temperature for petroleum products
K. R. Ramakumar, Indian Oil Corp. Ltd., Gujarat, India
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The flash point of a hydrocarbon mixture is a very important parameter especially with regards to the safe handling, storage and transportation of hydrocarbons. By definition, the flash point is the minimum temperature at which vapors from the mixture would produce a momentary flash when subjected to a standard test flame. The two widely accepted test methods for flash-point determinations are Pensky Martins and Abels flash apparatus. Flash points are extremely dependent on the lighter ends of any petroleum fraction.
Methods. Riazi and Daubert determined that for petroleum fractions, ASTM 10% is more appropriate for calculating flash points. They proposed two equations for predicting flash points:
where T f and T 1 are in [degree(s)]R
T 1 is the ASTM 10% temperature of...