4.6.6.3.(1)

Intent 1:

To limit the probability that vehicle impact on, or mechanical damage to, the valve mounting area will lead to failure of the valve and piping, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to damage to the building or facility.

Intent 2:

To limit the probability that vehicle impact on, or mechanical damage to, the dispenser will lead to failure of the dispenser piping, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to damage to the building or facility.

Intent 3:

To limit the probability that fire exposure on the dispenser and associated piping will lead to failure of the dispenser piping, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to damage to the building or facility.