Page 192 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

practicable, gas detection should monitor a number of levels within the
pumproom, not just the lower area.
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A fixed sampling arrangement to enable the oxygen content within the
pumproom to be monitored from the deck by a portable meter prior to
pumproom entry. Where such an arrangement is fitted, it should
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ensure that remote parts of the pumproom can be monitored.
Temperature monitoring devices fitted to the main cargo pumps in
order to provide remote indication of the temperature of pump
casings, bearings and bulkhead seals. Where such equipment is fitted,
procedures should be developed with regard to the action to be taken
in the event of an alarm occurring.

A high level alarm in pumproom bilges which activates audible and
visual alarms in the cargo control room, engine room and the
navigating bridge.
Manually activated trips for the main cargo pumps provided at the
lower pumproom level and at the top (main deck) level.

Spray arrestors around the glands of all rotary cargo pumps in order
to reduce the formation of mists in the event of minor leakage from
the gland.
Examining the feasibility of fitting a double seal arrangement to
contain any leakage from the primary seal and to activate a remote
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alarm to indicate that leakage has occurred. However, the impact of
any retrofit on the integrity of the pump will need to be clearly
assessed in conjunction with the pump manufacturer.
Particular attention to be given to the adequacy of fire protection in the
immediate vicinity of the cargo pumps.
Because of the problems associated with flashback re-ignition after
the use of the primary fire-fighting medium, consideration should be
given to the need to provide a backup system, such as high expansion
foam or water drenching, to supplement the existing system.

On ships fitted with an inert gas system, the provision of an
emergency facility for inerting the pumproom could be an option,
although careful attention must be paid to the safety and integrity of
the arrangement.

The provision of Emergency Escape Breathing Devices (EEBDs)
located within the pumproom and readily accessible.

158 © ICS/OCIMF/IAPH 2006