Why are some tank equipment installed in pits?
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As the title suggests, pit areas tend to accumulate water, as well as toxic substances; moreover, they take up space. So why are some storage tanks placed in such pits?
Are you referring to the drainage tank? It can flow by gravity underground; otherwise, it cannot be drained.
For some storage tanks, such as those that pose an explosion risk, there are requirements for maintaining a safety distance from surrounding buildings. If these tanks are installed underground, the required safety distance is reduced. Therefore, in order to make effective use of space, some storage tanks are installed underground
It doesn’t have to be a drainage tank; it can be an ordinary storage tank
1: First, in terms of fire separation distances, the spacing required between semi-underground or underground tanks is smaller. 2: Regarding venting, the F value is much lower when calculating physical overpressure; thus, the impact of external fires on such tanks is reduced. 3: Sometimes, the height of the top outlet also needs to be taken into consideration. 4: For substances like bromine, it is necessary to store them directly in a triple-proof tank. Other reasons are still being investigated; I hope this information is helpful to you
Cylinders buried in the ground or placed in pits in factories often have self-priming inlets. In remote areas, those located closer to living areas, such as fuel station storage tanks, require less land and reduce the required safety distances.
It’s mainly some sewage and oil storage tanks; the wastewater is collected by gravity through buried pipelines. Nowadays, most new factories use closed-system discharge methods
Some serve as low-level troughs; in such cases, their position is determined by the height difference of the equipment. If the equipment above the ground is raised higher, some of the low-level devices end up at ground level. Another category is **chemicals; as mentioned on the 3rd and 6th floors, this is to reduce the required safety and fire separation distances. Another purpose is to prevent the spread of toxic and harmful substances in the event of a leak.
I agree with the view from floor 9; in design, due to the requirements of the entire manufacturing process, the position of the low-level tank is determined by the pressure difference. Additionally, it is possible to reduce the required fire separation distances in some cases.