3.6.1 Independent pressure tanks should be fitted
with pressure relief devices that are so designed as to direct the
discharge away from personnel and that have a set pressure and capacity
which is in accordance with standards acceptable to the Administration
taking into account the design pressure referred to in 3.4.4.
3.6.2 Cargo tank vent systems of integral or independent
gravity tanks should meet the requirements of the International Bulk
Chemical Code, except that the height specified in 8.3.4 of the Code may be reduced to 2 m.
3.6.3 The location of cargo tank vent outlets
for independent pressure tanks and for cargo tanks used to carry pollution
hazard only substances with a flashpoint exceeding 60°C (closed
cup test) should be to the satisfaction of the Administration.
3.6.4 Cargo tank vent systems of portable tanks
allowed under 3.4.2 should be
to the satisfaction of the Administration, taking into account the
requirements of 3.6.