Abstract: The progresses, principles and correlations among methods for determining freezing point of jet fuel are presented. According to the appointment of the national standard ASTM D1655-07e for jet fuel, in United States test methods including conventional ASTM D2386-06, automatic phase transfer ASTM D5972-05, automatic laser ASTM D7153-05 and automatic fiber optic ASTM D7154-05, are all qualified to be used alternatively for determining freezing point of jet fuel, in which only ASTM D5972-05 and ASTM D7153-05 can be used as arbitration methods. The above four test methods are also being used for determining the freezing point of jet fuel in other countries, yet only ASTM D2386-06 and its equivalent can be used as arbitration methods. In China, based on the requirement of national standard GB 6537—2006 for 3# jet fuel, test method GB/T 2430-2008 and SH/T 0770-2005, which is equivalent to ASTM D2386-06 and ASTM D5972-05 respectively, are now used for determining the freezing point of jet fuel and GB/T 2430-2008 is the arbitration method. ASTM D5972-05, ASTM D7153-05 and ASTM D7154-05 are highly automatic instrumental methods developed recently; they are relatively easy to be operated and having good reproducibility. Other methods for measuring freezing point of jet fuel in research or under standardizing are also outlined briefly.

Key words: jet fuel, freezing point , test method