Page 187 - International safety guide for oil tankers and terminals

ENCLOSED SPACES

non-intrinsically safe electrical equipment must not be taken into an
enclosed space.
---ใช้เพื่อการศึกษาเท่านั้น---
Only approved safety lighting or intrinsically safe electrical equipment
should be used in enclosed spaces that are liable to experience
hydrocarbon vapour re-contamination.

In port, any local regulations concerning the use of electric lights or
electrical equipment should be observed.

10.9.5 Removal of Sludge, Scale and Sediment
When removing sludge, scale or sediment from an enclosed space,
periodic gas tests should be undertaken and continuous ventilation should
be maintained throughout the period the space is occupied.

There may be increases in gas concentrations in the immediate vicinity of
the work and care should be taken to ensure that the atmosphere
remains safe for personnel. It is strongly recommended that personal gas
monitors are provided to some or all of the persons engaged in the work.

Work Boats
10.9.6 สมุด ศูนย์ฝกพาณิชย์นาวี
ึ
Any work involving the use of work boats in cargo tanks presents
additional hazards, which must be managed by the Company’s Safety
Management System.

Work boats used for tank repair work and tank inspections should be fit
for the task for which they are to be employed. Before and during their
use within an enclosed space, all conditions for entry, including the use of
an entry permit should be observed (see Section 10.5). The following
precautions should also be taken:
All deck apertures, such as tank washing plates, should be opened
and effective ventilation maintained continuously while persons are in
the tank.
The work boat should only be used when the water surface is calm.
งานห้อง The water level in the tank should be either stationary or falling. On no
The work boat should only be used in tanks containing clean ballast
water.

account must the level of the water be rising while the boat is in use.
All personnel working in the compartment should wear a buoyancy aid.
A Responsible Person should act as lookout at the top of the tank and
if the boat is working at a point remote from the tank hatch, an
additional lookout should be positioned a little way down the access
ladder at a point where a clear view of the boat is provided.

© ICS/OCIMF/IAPH 2006 153