Purified water and WFI Storage tank

Is there any regulation or standard for storage tank dimensions? I want to know about size ration for height and diameter of PW and WFI storage tanks.

As per your requirement you should be able make size of tank like 5000 L, 10000 L but must maintain the PW and WFI criteria as per USP. Dimension is not the standard but you required Roughness < 0.5 Ra mirror polish and material must used SS 316L.