Should the floating roof tank drainage system be on constant shutdown or constant operation?
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Should the valves in the floating roof tank drainage system be kept closed or open? Please ask
The safety valve must remain closed at all times, and should only be opened when it is raining, primarily to prevent pipe leaks and the escape of oil from the central drainage system!
Upstairs, what will happen if you forget to turn it on when it rains?
The rainwater inlet of external floating roof tanks should definitely be kept closed, to prevent potential losses such as oil leaks; if it isn’t closed during rain, accidents like oil spills from the floating roof can occur, and it can also lead to an increase in the weight of the floating roof, resulting in inaccurate capacity calculations
It remains open when no oil is flowing in, and it stays closed once oil starts to flow in. It opens when descending; if it is forgotten to be opened, there is also an emergency drainage system that automatically drains the contents from the tank in order to protect the floating roof. Of course, such a situation should ideally not occur.
It’s always open; otherwise, when it rains heavily, you’ll have to go out in the rain to open the valve
There is no conclusion as to whether it should be kept open or closed all the time. If it is kept closed, what if rain comes suddenly and there aren’t many people available to operate it? Is it possible to open the valves quickly in such a situation?
If it refers to the central drainage pipe, it is opened only during rain and closed after the rain stops.
The conclusion is that it is usually turned off. To avoid the question you raised, an electric valve was chosen.
It’s possible, but it’s a bit luxurious
Stay closed to prevent oil leakage from the drain pipe! If it rains and the system is forgotten to be turned on, the floating roof tank still has an emergency drainage system; as long as it’s not blocked in normal operation, rainwater can flow directly into the tank.