Issue with isolation valves on pipes for the inflow and outflow of flammable liquids
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Our company’s storage tanks for flammable liquids are required to be equipped with emergency shut-off valves on their inlet and outlet pipelines. We use bottom feeding and bottom discharging; in this case, can the inlet pipeline and the outlet pipeline share one emergency shut-off valve? Thank you!
What if feeding and discharging occur simultaneously?
The emergency shut-off valve is primarily used to disconnect the tank from the outside, and its use is likely to fail approval.
Our storage tank feeding and discharging occur at different times.
I think it’s fine if they’re not done at the same time; consult the security department again.
Since the inlet and outlet pipes are separate, the emergency shut-off valves cannot be shared, right?
I can do it too; many people do it this way
It should be possible； Because during design, the incoming and outgoing materials share the same pathway ； Its function is to disconnect and isolate the storage tank from the outside world in emergency situations ； It is not common for a tank to have materials entering and exiting it at the same time; generally, designs include dynamic tanks and static tanks ； At least one in use and one as a backup ；
We use 2. Everyone uses their own.
If the inlet and outlet pipes are the same, installing a shut-off valve should work. In fact, in terms of reliability, it is not only necessary to install them, but you are also advised to use dual valves. I set it up in this way in the unit’s tank area. After all, the possibility of both valves leaking at the same time is very low.
A cut-off valve is provided for discharge; one seems not necessary for feed.