To supersede the requirements of Sentence 4.8.7.3.(1) for bolted flange type connections and permit cam-locking connections up to a certain size.
This [use of cam-locking connections] is to limit the probability that hose connections will loosen from normal operations, 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 harm to persons.