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A rectangle with flat ends, holding liquid at atmosphere.
Also known as: Fixed roof tank symbol
On a process diagram an atmospheric storage tank is drawn as a rectangle with flat closures, holding liquid at or near atmospheric pressure.
Denotes a tank holding liquid at atmospheric pressure.
Contexts: Technical drawing
Is distinguished from a pressure vessel by its flat rather than curved closures, which reflects that a flat head cannot hold pressure.
Contexts: Technical drawing
An upright rectangle closed at top and bottom by straight horizontal lines.