How is the safe liquid level for crude oil floating roof storage tanks determined?
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Dear forum members, for an existing external floating roof crude oil storage tank with a capacity of 30,000 cubic meters, how should the upper and lower limits of the safe liquid level be determined? Are there any relevant regulatory requirements? Please help to answer!
Design institutes generally set upper and lower limits; the upper limit is usually 800 mm below the safety height interlock, while the lower limit corresponds to the center height of the discharge port. In actual production, however, more conservative values are used than those specified in the design. The upper limit can be calculated based on the requirements regarding foam, whereas the lower limit is set such that the floating disk does not touch the ground