Page 190 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

10.11.2 Cargo and Ballast Line Draining Procedures
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On some tankers, no provision is made for effective line draining and, in
order to meet the demands of certain product trades, final line contents
are drained to the pumproom bilge. This is an unsafe practice and it is
recommended that cargo procedures be reviewed with the aim of
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
preventing a volatile product being drained to the bilge.
It is strongly recommended that consideration is given to the provision of
a comprehensive stripping arrangement to enable all lines and pumps to
be drained effectively to a cargo tank, slop tank or dedicated reception
tank, for subsequent discharge ashore.

Where lines that have been used for ballast have to be drained to the
pumproom bilge on completion of deballasting, care must be taken to
ensure that such drainings do not contain petroleum.

10.11.3 Routine Maintenance and Housekeeping Issues
It is important that the integrity of pipelines and pumps is maintained and
that any leaks are detected and rectified in a timely fashion.
Pumproom bilges should be kept clean and dry. Particular care should be
taken to prevent the escape of hydrocarbon liquids or vapour into the
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pumproom.
Pipelines should be visually examined and subjected to routine pressure
tests to verify their condition. Other means of non-destructive testing or
examination, such as ultrasonic wall thickness measurement, may be
considered appropriate, but should always be supplemented by visual
examination.

Procedures should be established to verify that mud boxes and filters are
properly sealed after they have been opened up for routine cleaning or
examination.

Valve glands and drain cocks should be regularly inspected to ensure that
they do not leak.

Bulkhead penetrations should be routinely checked to ensure the
effectiveness of seals.
Critical bolts on the cargo pumps and associated fittings, such as
pedestal fixing bolts, pump casing bolts and bolts securing shaft guards,
should be secure. In addition, requirements for their examination should
be included in routine maintenance procedures.

The pumproom rescue harness and rope should be checked regularly to
ensure it is fit for use and rigged for immediate operation.
Emergency escape routes should be checked regularly to ensure that
they are properly marked and clear of obstructions. Where an escape
trunk is fitted, doors should be checked for ease of operation, door seals
should be effective and lighting within the trunk should be operational.

156 © ICS/OCIMF/IAPH 2006