To add to the above, I cannot see anywhere in API RP 2030 or even API RP 2001 (which is cross referenced in the 2030) where it stipulates the period of coverage for tanks and the surface area to be considered when designing the fire fighting. For example if you have 10 tanks in a bund area and you are designing the water requirements do you need to allow for the surface area of all 10 tanks to be covered at the same time and what period of time do the tanks require coverage for?

Anybody with experience in design of tank cooling and firefighting systems