Water storage tank design description: bulk storage of liquids is generally handled by closed tanks to prevent escape of volatile and contamination. in some instances, such as water storage, where contamination and dilution are not a factor, large reservoirs can be employed.. H is the design fluidheight in feet. d is the nominal tank diameter in feet. g is the specific gravity of the contents. s is the tank wall material allowa-ble tensile stress for the operating or test condition. ca is the corrosion allowance, if any. api 650 storage tanks are often designed to work at temperatures of up to 500
