Discussion on reducing losses in oil depots
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This post was last edited by *aojiaoya0546 on 2015-7-9 at 16:36 to summarize the oil inventory levels; the oil inventory seems to decrease inexplicably. Let’s discuss why oil depots experience negative balances What are the things to keep in mind when managing oil depots on a daily basis? Thank you
Let’s go into the details: what kind of medium, what type of storage tank, and how long does it take for a decrease to occur after it comes to rest? Any storage tank experiences some level of loss; it’s just a matter of how much. Dome tanks suffer the most loss, while tanks with internal floating roofs and nitrogen sealing have the least loss. (In atmospheric-pressure storage tanks) If it’s a refined oil depot, check to see if there is any oil theft. For a storage tank with a capacity of tens of thousands of cubic meters, it’s normal to have a loss of a few cubic meters per day; there might also be errors in the measurements.
Materials with low volatility suffer less loss, while materials with high volatility (in vertical steel storage tanks) can be equipped with floating trays. If the tank root valve does not leak, there is no fuel thief. Generally, there are quite few!
For gasoline, we use 1W internal floating roof storage tanks without nitrogen seals; for diesel, we use 2W internal floating roof storage tanks without nitrogen seals. If it remains stationary, there may be errors of a few tons per day when checking the reports; generally it’s 1 or 2 tons, sometimes more and sometimes less, and this is related to both measurement and temperature. What is your daily loss amount?
Look at the measurement methods: oil temperature changes (oil collection/standstill, day/night), internal valve leakage, and things of that kind. It’s normal to have an error of about 1 ton per day, right? How long does a single tank remain stationary? It’s not an oil depot for strategic reserves, right? If it’s a live tank that is handled daily, I think 1 ton is quite normal.
The losses consist of large-breath losses and small-breath losses; it is advisable to carry out oil transfers at night. It is currently difficult to determine the quality of the floating disk seal, so it should be inspected at an appropriate time. Generally, the storage loss is around 0.2 percent. The measurement calculations are rather complex; the design temperature, density, and measuring instruments have a significant impact. Whether it is a steel strip or a radar level gauge, it is necessary to calibrate the level gauge regularly.