Page 158 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

Isolation of the work area and fire safety precautions should be continued
until the risk of fire no longer exists.
---ใช้เพื่อการศึกษาเท่านั้น---
Personnel carrying out the work should be adequately trained and have
the competency required to carry it out safely and effectively.
assessment and the precautions set out in Section 9.4.3.1 should beชย์นาวี
A flow chart for guidance is shown in Figure 9.1.

Figure 9.2 depicts how guidance for Hot Work on an inerted ship may be
presented within the SMS. This is provided as an example for operators
to tailor to their own requirement.

9.4.3.2 Hot Work in a Gas Safe Area

A dedicated area outside the engine room, for example on the poop
behind the accommodation and well clear of any oil tank vents, may be
งานห้องสมุด ศูนย์ฝกพาณิ
considered for Hot Work. Such an area should be marked accordingly.
Any work intended at this location should be subject to a full risk

taken.

9.4.3.3 Hot Work Inside the Machinery Space
Hot Work inside the main machinery space, when associated with fuel
ึ
tanks and fuel pipelines, must take into account the possible presence of
hydrocarbon vapours in the atmosphere and the existence of potential
ignition sources.

No Hot Work should be carried out on bulkheads of bunker tanks, or
within 500 mm of such bulkheads, unless that tank is cleaned to Hot
Work standard.

The flow chart (Figure 9.1) assumes the work is considered essential
for safety or the immediate operational capability of the ship, and that it
cannot be deferred until the next planned visit to a repair yard.

9.4.4 Hot Work in Dangerous or Hazardous Areas

9.4.4.1 General
Dangerous or hazardous areas are locations on board or within the
terminal where an explosive atmosphere could be present, as defined in
Section 4.4.2. For ships, this effectively means an area slightly larger than
the cargo tank deck, which includes cargo tanks and pumprooms, and the
atmospheric space around and above them. No Hot Work should be
undertaken in a dangerous or hazardous area until it has been made
safe, and has been proved to be safe, and all appropriate approvals have
been obtained.

Any Hot Work in a dangerous or hazardous area should be subject to a
full risk assessment, and the guidance in Section 9.4.3 should also be
followed. Account must be taken of the possible presence of hydrocarbon
vapours in the atmosphere and the existence of potential ignition sources.

Hot Work in dangerous or hazardous areas should only be carried out
when the ship is in ballast. Hot Work should be prohibited during cargo or
ballast operations, and when tank cleaning, gas freeing, purging or
inerting. If Hot Work needs to be interrupted to carry out any of these

124 © ICS/OCIMF/IAPH 2006