After oil processing, it is often necessary to test the density of oil products. By testing, different types of oil products are classified and processed, packaged and put into the development process of society through reasonable processing. However, oil density detection is often influenced by external factors and other factors, which may ultimately lead to errors in the analysis of oil quality and prevent the effective utilization of related oil products. During the testing process, the density of oil products is often influenced by temperature, volatility, viscosity, and the environment.
Relationship Between Temperature and Oil Density Measurement
The influence of ambient temperature on the reading of the density meter is also sufficient to cause deviation in the measurement results. Generally, the temperature change coefficient r of oil products is 0.00052-0.00107. Therefore, in the density measurement process, attention should be paid to the influence of ambient temperature changes to prevent some improper operations. Attention should be paid to the difference between oil temperature and room temperature when dealing with light oil products such as gasoline, coal, and diesel. The temperature changes in the south and north vary greatly, especially in the north, where the conditions in spring, summer, and autumn are no different from those in the south.
Generally, the difference between oil temperature and room temperature is not significant. When measuring the density of light oil products such as gasoline, kerosene, and diesel, most measurements are made at room temperature. The temperature of the sample and the analytical testing instrument are the same, and the density meter can be balanced by staying in the sample for a short time. During the measurement process, the reading of the thermometer will quickly stabilize. However, in winter, it is important to note that the temperature of the oil products is generally between 5-10 °C, but the laboratory room temperature will be higher than the temperature of the oil products, The reason is that the laboratory has heating facilities. Therefore, during the measurement, either the oil should be left for some time to allow its temperature to naturally rise, or the oil should be slightly heated in a water solution. In short, the temperature of the oil should be stable during the measurement and the influence of ambient temperature on density measurement should be minimized as much as possible.
The Influence of Volatility and Viscosity on the Oil Density Measurement
Accurately determining the density of oil products, especially crude oil, is a challenging task due to the properties of crude oil. Crude oil is a mixture of various types of oil, and its properties vary depending on its composition. To determine the density of crude oil, it is important to minimize intermediate steps from sampling to laboratory testing to prevent the volatilization of light components. The temperature of crude oil should be appropriate during testing, which is crucial. Excessive temperature and measurement time can lead to the volatilization of light components, resulting in higher measurement results; If the temperature is too low and the crude oil viscosity is high (in a paste-like state), the density meter cannot float freely and reach a natural equilibrium state, which will also result in higher measurement results.
The Influence of Environmental Factors on the Oil Density Measurement
In the process of measuring the density of oil products, airflow can also have an impact on the measurement results. During the measurement process, the larger the airflow, the greater the surface evaporation of the oil, and the more severe the volatilization of light components. These all result in higher density measurement results. At present, when using the density meter method to measure the density of oil products, is generally carried out in the laboratory. However, if there are special circumstances, such as the request of a cargo interest party to inspect the sampling site, it must be conducted in an outdoor environment. Under laboratory conditions, it is easy to ensure that no airflow is generated. As long as the doors and windows are closed, the exhaust fan is turned off, and personnel are avoided from frequent walking, the conditions can be achieved. However, in outdoor conditions, good shelter points should be selected, and the measurement process should be fast and accurate. This environment requires inspectors to have proficient on-site operation skills.
In summary, through the analysis of environmental factors, volatility, viscosity, temperature, and other factors, this article provides a detailed discussion of the factors that affect the density determination process of oil products and corresponding detection methods. In the future development process, the quality of oil products will directly affect their benefits. Therefore, improving the analysis of factors affecting oil density determination, and reducing the proportion of the above factors in the analysis process, will effectively improve the accuracy of oil density determination.