To limit the probability of unrecognizable information on identification tags, which could lead to delays in shutting off the flow of liquid during an emergency, which could lead to the escape of liquid not being minimized, which could lead to the spread of liquid, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to damage to the building or facility.
To limit the probability of mixing incompatible liquids during normal operations, which could lead to a fire or explosion, which could lead to damage to the building or facility.