Page 227 - International safety guide for oil tankers and terminals
P. 227
SHIPBOARD OPERATIONS
A metal rod may be used on the end of a metal tape if
earthed to the ship by means of a clamp or bolted metal
lowering equipment into cargo tanks.ั้น---
connection.
A metal sounding rod suspended on a fibre rope should
NOT be used, even if the end at deck level is fastened to
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
the ship because the rope cannot be relied upon to provide
an earthing path.
Equipment made entirely of non-metallic materials may, in
general, be used, for example a wooden sounding rod may
into the tank.ษาเท่าน
be suspended on a natural fibre rope without earthing.
Ropes made of synthetic polymers should NOT be used for
h) Measures should be taken to guard against ignition from
mechanical defect of machinery, e.g. in-tank (submerged)
cargo pumps, tank washing machines, tank gauging equipment
etc.
---ใช้เพื่อการศึก
i) Precautions should be taken to eliminate the risk of
mechanical sparks from, for example, metallic objects such as
hand tools, sounding rods, sample buckets etc being dropped
ึ
j) The use of non-intrinsically safe equipment, for example,
torches and inspection lamps, mobile phones, communications
radios, handheld computers and organisers etc should NOT be
allowed.
11.3.6 Precautions for Tank Washing
11.3.6.1 Portable Tank Washing Machines and Hoses
The outer casing of portable machines should be of a material
that will not give rise to an incendive spark on contact with the
internal structure of a cargo tank.
The coupling arrangement for the hose should be such that
effective bonding can be established between the tank washing
machine, the hoses and the fixed tank cleaning water supply line.
Washing machines should be electrically bonded to the water
hose by means of a suitable connection or external bonding wire.
When suspended within a cargo tank, machines should be
supported by means of a natural fibre rope and not by means of
the water supply hose.
11.3.6.2 Portable Hoses for Use with Both Fixed and
Portable Tank Washing Machines
Bonding wires should be incorporated within all portable tank
washing hoses to ensure electrical continuity. Couplings should be
connected to the hose in such a way that effective bonding is
ensured between them.
© ICS/OCIMF/IAPH 2006 193
