Page 164 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

worked on should be cleaned and gas freed to a ‘safe Hot Work’
standard, regardless of whether or not it is removed from the hazardous
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cargo area.

If the location where the Hot Work is to be carried out is not in the
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
immediate vicinity of the disconnected pipeline, consideration should be
given to continuous through ventilation of the pipeline with fresh air and
monitoring the exhaust air for hydrocarbon vapour.

Heating coils should be flushed or blown through with steam and proved
clear of hydrocarbons.

9.5 Welding and Burning Equipment

Welding and other equipment used for Hot Work should be carefully inspected before
each occasion of use to ensure that it is in good condition. Where required, it must be
correctly earthed. When using electric arc equipment, special attention must be paid to
ensure that:

Electrical supply connections are made in a gas free space.
Existing supply wiring is adequate to carry the electrical current demand without
overloading, causing heating.
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Insulation of flexible electric cables is in good condition.
The cable route to the work site is the safest possible, only passing over gas free or
inerted spaces.

The earthing connection is adjacent to the work site and the earth return cable leads
directly back to the welding machine. The ship’s structure should not be used as an
earth return.

9.6 Other Hazardous Tasks

A hazardous task is defined as a task, other than Hot Work, which presents a hazard to
the ship, terminal or personnel, the performance of which needs to be controlled by a
risk assessment process, such as a Permit to Work system.

It follows that, for each hazardous task, a work permit or controlled procedure should be
developed and approved. The permit or controlled procedure should follow the process
outlined in Section 9.3 and should be discussed with the personnel who are performing
the task.

The procedure, approval and record of compliance should be retained within the SMS
records.

Hazardous tasks should only be carried out alongside a terminal with prior agreement
of the Terminal Representative.

Examples of such tasks are:
Enclosed space entry.

Tank inspections.
Diving operations.
Blanking sea chests.

130 © ICS/OCIMF/IAPH 2006