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I need the experts’ help – how did the oil in the oil tank disappear?

2010-07-01View Original

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:'(The oil stored in the tank hasn’t been inventoried for a year; in March last year, 5 tons of 32# mechanical oil were purchased, and it wasn’t used up until June this year. After it was used up, it was found that 150 kilograms were missing.) I’m not sure why, but after looking up some information, I found that there’s something called differential breathing in oil tanks, as well as other types of losses. I really don’t know how to calculate these values. Anyone who has relevant information could please help me; thank you very much! The oil tank is 4.5 meters high and 2.2 meters in diameter; it has a breathing opening at the upper head, but no breathing valve is installed.
Reply #22010-07-01
There are many reasons for oil product loss. Oil accumulation in pipelines, oil clinging to tank walls, and breathing losses, among others. It also has to do with the frequency at which you use hair spray. The actual loss rate is three percent. Strengthen inventory checks in the future. Let’s see if we can find a pattern
Reply #32010-07-01
The current loss rate is 3%, while the standard loss rate set by the company for us is only 0.3%. I have no idea where all the other oil has gone – how can this be calculated? Urgent! ! !
Reply #42010-07-02
Oil evaporation losses are significant every year; these can be reduced by improving management practices such as checking insulation, controlling the opening degree of breather valves, and managing oil inflow and outflow. General losses are kept at 3%.
Reply #52010-07-02
Check for leaks in the oil tank, and also improve insulation to reduce the evaporation of oil and gas. If it isn’t used for an extended period of time, it’s best to seal it and prevent air from entering; this way, the oil and gas create a certain pressure inside the container, which naturally reduces evaporation.
Reply #62010-07-02
This post was last edited by oil transfer arm on 2010-7-2 at 14:54. There are many reasons for oil loss, which can be roughly divided into losses during static storage and losses due to changes in the liquid level during loading and unloading operations – what is commonly referred to as \"major and minor breathing\". Some measures to reduce oil losses include: 1. Installing breather valves at the breathing openings of oil tanks, and increasing the control pressure of these breather valves within the limits tolerated by the tanks, in order to reduce minor leaks ; 2. Try to keep the oil tanks storing the oil at a relatively high liquid level ; 3. During the high temperatures at noon, measures such as spraying water for cooling should be employed to reduce the evaporation losses of oil due to rising temperatures.
Reply #72010-07-02
The storage loss is 0.01%, and the loss during transfer in oil tanks is also 0.01%. The issue lies in the number of times the tank is transferred, as well as whether a vent valve is installed; in such cases, the storage loss will be higher. The lower the liquid level in the tank, the greater the loss, because oil and gas need to evaporate to form saturated vapor! The larger the space, the greater the evaporation rate, and thus the greater the transfer losses! So keep the oil tank at a high liquid level as much as possible! The figures given above are all fixed loss rates! Fixed loss: It refers to the maximum amount of oil loss that occurs during storage and transportation, due to the properties of the oil, the level of storage and transportation technology, and the normal operational condition of the equipment. Measures to reduce losses: 1. Reduce the number of operational steps and make rational use of oil tanks ; 2. Arrange storage and transportation operations reasonably to reduce breathing losses ; 3. Use auxiliary equipment to reduce breathing losses ; 4. Lower the temperature of the oil tank to reduce evaporation losses ; 5. Maintain the equipment in good condition ; 6. Make good use of the metering port to avoid significant breathing losses ; 7. Operate carefully to prevent spills and leaks.
Reply #82010-07-03
There are several reasons for this. If it’s gasoline, it’s likely to evaporate completely within a year. It’s very important to take measures to cool the oil tank; you can spray cold water or install a small heat exchanger at the vent. Also, ensure no oil leakage during transportation and maintain proper sealing.
Reply #92010-07-13
Installing an internal floating disk can effectively save fuel and prevent the evaporation of oil and gas
Reply #102010-07-14
That’s amazing – it took 1 year to think about doing an inventory check. We usually conduct such checks every month

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