Evaluation of the Impact of Density on Selected Quality Control Tests of Petroleum Products at North Refineries Company (NRC), Baiji

This study aims to evaluate the effect of the density of petroleum products, including gasoline, kerosene, and gas oil, on selected quality control tests. Three types of petroleum products (gasoline, kerosene, and gas oil) obtained from the North Refineries Company (NRC), Baiji, were investigated. Three samples of each product were analyzed. The density of the petroleum products was determined using a hydrometer, while the octane number of gasoline was measured using a portable octane number analyzer. The flash point of kerosene and gas oil was determined using closed-cup and open-cup flash point testers. The results showed that the flash point of kerosene and gas oil increased with increasing density, whereas the octane number of gasoline decreased as density increased. Furthermore, the study recommends the periodic calibration of laboratory testing equipment and strict adherence to the specified upper and lower limits of quality control tests to ensure reliable and accurate results.