The storage tank was deflated
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Under what circumstances will a storage tank collapse? Can it collapse due to an absolute vacuum inside it?
This depends on the design pressure of the storage tank, as well as its ability to withstand negative pressures.
For things that have happened, there are examples available online.
It is related to all three stages: design, manufacturing, and use
There is no absolute vacuum; it mainly depends on the tolerance capacity designed for the storage tank
This post was last edited by fzujunru on 2016-8-5 11:21. From a design perspective, the design negative pressure must be taken into account during calculations; it is generally set at -0.25 KPa
This happens when the vent valve at the top gets blocked; it occurred in our oil washing tank as well.
Storage tanks have very weak resistance to external pressure; not to mention a vacuum, even a slight negative pressure will cause them to collapse
If the breather valve and safety valve fail, a certain negative pressure will be generated, which can cause deflation
If the storage tank is designed to withstand negative pressure, this phenomenon does not occur. However, in the absence of such resistance to negative pressure, there is a high likelihood of the tank collapsing. For example, if the liquid level inside the tank keeps flowing out, or if there are issues with the breathing system or nitrogen sealing used to supply air to the tank, negative pressure can develop, leading to the tank collapsing. This is why it is necessary to regularly check the reliability of the tank’s breathing system and nitrogen sealing mechanism