Page 144 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

8.1.3.2 Foam Systems
8.1.3.5 Inert Gas Systemึกษาเท่านั้น---
Foam systems are used for fighting fire in the cargo spaces, on the cargo
deck, in the pumproom or in the engine spaces. A foam system has
storage tanks containing foam concentrate. Water from the fire pumps
picks up the correct proportion of foam concentrate from the tank through
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
a proportioner and the foam solution is then conveyed through permanent
supply lines to offtake points, fixed foam monitors or, in the case of
engine room installations, to fixed dispersal nozzles.

8.1.3.3 Water Fog
A water fog system consists of high pressure water lines and special fog
nozzles. A ring of nozzles around the inside of the tank opening
effectively blankets a cargo tank hatch fire. Some ships are also fitted with
fixed pressurised water fog systems for protecting specific parts of the
engine room, such as oil fuel treatment spaces, boiler firing platforms,
small machinery spaces and pumprooms.

8.1.3.4 Water Curtain

Some ships have a fixed system to give a protective water curtain
---ใช้เพื่อการศ
between the cargo deck and the superstructure.

ึ
The purpose of an inert gas system is to prevent cargo tank fires or
explosions. It is not a fixed fire-fighting installation but, in the event of a
fire, the system may be of assistance in controlling the fire and preventing
explosions.

8.1.4 Portable Fire Extinguishers

All tankers are provided with a range of portable fire extinguishers to meet the
requirements of their flag administration. In addition to the fire extinguishers in
use, tankers are also required to carry spare charges for refilling used
extinguishers. In the case of CO extinguishers, spare fully charged
2
extinguisher cylinders are carried.
All fire extinguishers should at all times be in good order and available for
immediate use. The ship’s Safety Management System should contain
procedures for onboard maintenance, including that provided by service
agents. As a minimum, all fire extinguishers should be formally checked for
proper location, charging pressure and condition annually. (Guidelines for the
maintenance and inspection of fire protection systems and appliances are
contained in IMO MSC Circular 850, as amended.)

Consideration should be given to providing portable extinguishers, suitable for
use on Class A fires (see Section 5.2.1), and dedicated to deployment at the
ship’s manifold when in port.

110 © ICS/OCIMF/IAPH 2006