Page 328 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

19.2.10 Fire Extinguishing System Compatibility
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Where a detection system is part of an automatic fixed fire extinguishing
system, complete compatibility between the systems is essential.
Detection devices and systems that are highly susceptible to false alarms
should be avoided, especially when they are connected to fixed fire
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
extinguishing systems for automatic activation (see Section 19.3.5).

19.3 Alarm and Signalling Systems

An alarm and signalling system must perform four significant functions. It should:

Rapidly transmit an alarm or signal to indicate the detection of fire before there is
significant damage.
Initiate a sequence of events to evacuate personnel in the vicinity of fire.

Transmit an alarm or signal to notify responsible parties or initiate an automatic
extinguishing system.
Have the capability to automatically self-test and warn of malfunction.

19.3.1 Types of Alarm Systems

Alarm systems are used to indicate an emergency and to summon
assistance. ึ

There are many different types ranging from a local system providing an
alert signal at the protected facility, to one which alerts at a remote station
attended by trained personnel 24 hours per day, such as a fire or police
station or a third party answering service.

The type of system installed at a particular location should be based on a
thorough risk assessment with input from competent personnel in the field
of fire protection, taking due account of any applicable local regulations.

19.3.2 Types of Signal

Fire alarm systems provide several distinct types of signal which can be
audible, visual or both. They range from relatively simple trouble signals,
such as alarms for power interruptions, through supervisory signals, such
as when critical equipment is in an abnormal condition, to either coded or
non-coded alarm signals sounded when a fire alarm is activated either
continuously or in the form of a prescribed pattern.

19.3.3 Alarm and Signalling System Design
Any variation or combination of the types of alarm and signalling systems
previously described can be used to meet local circumstances.

In a large terminal facility, or where the terminal is an integral part of a
large plant or processing facility, a coded signal system is usually
preferred. The facility should be divided into a grid system, with each area
of the grid identified by a numbered code. The coded signal system
should include a code transmitter that triggers an alert at the specific
location and also activates the general alarm.

294 © ICS/OCIMF/IAPH 2006