Ventilation
of pump rooms and other enclosed spaces
(1) (a) Cargo pump rooms and pump rooms having a
similar hazard shall be mechanically ventilated and discharges from the exhaust
fans shall be led to a safe place on the open deck.
(b) The ventilation of these rooms shall have
sufficient capacity to minimize the possibility of accumulation of flammable
vapours.
(c) The number of changes of air shall be at
least 20 per hour, based upon the gross volume of the space.
(d) The air ducts shall be arranged so that all
of the space is effectively ventilated.
(e) The ventilation system shall be of the
exhaust type, using fans of the non-sparking type.
(2) Ventilation
inlets and outlets and other deckhouse and superstructure boundary space
openings shall be located clear of the cargo pump room openings and openings
for machinery space ventilation shall be located as far aft as practicable
taking into consideration the location of any stern loading and discharging
facilities provided.
Additional requirements for
tankers constructed on or after 1 September 1984
(3) (a) The cargo spaces and their adjacent enclosed spaces
in combination carriers shall be capable of being ventilated by permanently
installed or portable fans.
(b) A fixed gas detection system shall be
provided in cargo pump rooms, pipe ducts and the cofferdams adjacent to slop
tanks.
(c) Arrangements shall be provided to detect the
presence of flammable vapours in all other spaces within the cargo tank area
from the open deck or other easily accessible positions.
Additional requirements for
tankers constructed on or after 1 July 2002
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