3.3.1.1 Cargo pump rooms
and cargo compressor rooms should be situated above the weather deck
and located within the cargo area unless specially approved by the
Administration. Cargo compressor rooms should be treated as cargo
pump rooms for the purpose of fire protection according to SOLAS regulation II-2/9.2.4.
3.3.1.2 When cargo pump rooms
and cargo compressor rooms are permitted to be fitted above or below
the weather deck at the after end of the aftermost hold space or at
the forward end of the forwardmost hold space, the limits of the cargo
area as defined in 1.3.6 should be
extended to include the cargo pump rooms and cargo compressor rooms
for the full breadth and depth of the ship and deck areas above those
spaces.
3.3.1.3 Where the limits
of the cargo area are extended by 3.3.1.2,
the bulkhead which separates the cargo pump rooms and cargo compressor
rooms from accommodation and service spaces, control stations and
machinery spaces of category A should be so located as to avoid the
entry of gas to these spaces through a single failure of a deck or
bulkhead.
3.3.2 Where pumps and compressors
are driven by shafting passing through a bulkhead or deck, gastight
seals with efficient lubrication or other means of ensuring the permanence
of the gas seal should be fitted in way of the bulkhead or deck.
3.3.3 Arrangements of cargo
pump rooms and cargo compressor rooms should be such as to ensure
safe unrestricted access for personnel wearing protective clothing
and breathing apparatus, and in the event of injury to allow unconscious
personnel to be removed. All valves necessary for cargo handling should
be readily accessible to personnel wearing protective clothing. Suitable
arrangements should be made to deal with drainage of pump and compressor
rooms.