Inspection standards for oil tankers when loading and unloading different petroleum products
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What are the inspection standards for oil tankers when loading different petroleum products? For example, if diesel was loaded last time and gasoline is to be loaded this time, and there is still some residual diesel in the tank, can gasoline still be loaded? There are other situations as well; those who know about this please advise. I work in a petrochemical company, responsible for overseeing the quality of products before they leave the factory. If the residual oil in the tank from the previous load is different from the type of oil that will be loaded this time, then which types of oil can be loaded and which cannot?
In my opinion, containers of different types of products should be cleaned before loading to ensure quality! ! ! For substances such as diesel, fuel oil, and kerosene, it is generally not necessary to clean the tank; especially when transferring from gasoline to diesel, skipping tank cleaning can easily result in an unacceptable flash point! ! ! For reference only! ! ! ! !
Domestic aviation fuel industry regulations stipulate that dedicated transport oil tankers should be used to carry a single type of aviation fuel. When using a non-specialized oil tanker, it must be proven that it has been used for transporting light oils in the preceding three years, rather than naphtha, gasoline, heavy oil, and chemical products. Additionally, the tank area as well as pumps, valves, and other equipment and pipelines must be thoroughly cleaned before loading aviation fuel; documents detailing the cleaning methods, procedures, and dates must be provided, along with a tank inspection report issued by a qualified professional agency after examining the results of the cleaning.