Docstoc

AUTOMATIC FIRE PROTECTION SYSTEMS

Document Sample
AUTOMATIC FIRE PROTECTION SYSTEMS Powered By Docstoc
					  Fire Detection &
Protection Systems
To be able to identify the various types
 of Fire Detection & Protection Systems
To learn about the operation of the
 various Fire Protection Systems
Introduction
Fire Alarm Call Points (Manual)
Alarm Sounders
Detectors
Automatic Water Sprinkler
Conclusion
 Fire Alarm Call Point
 Automatic Water Sprinkler
 Heat & Smoke Detectors
General guidelines for call points:
1. Call points must not be more than
    30 m apart from each other .
2. Be mounted at a height of 1.4m
   from the floor.
3. Free of obstructions.
4. Be mounted against contrasting
   background.
In a event of a fire,
break the glass of the
nearest manual call
point that you have
located.

That will sound the fire
alarm throughout the
building.
1. Distinct from other types of warning and continuous
   ringing tone of the bell.
2. Alerts occupants about the possible occurrence of a
   fire.
3. The minimum sound level produced by the sounders
   shall be 65 dB, or 5 dB above the background noise
   level.
1. HEAT DETECTOR
2. SMOKE DETECTOR
1. In a fire, great amounts of heat
   are produced.
2. Once the air in the room
   reaches a certain temperature,
   the heat detector activates and
   the alarm sounds off.
3. The temperature of the air
   increases slowly, therefore
   there will be a time lag between
   onset of fire and its detection
   by the heat detector.
1. Smoke detectors work by
   detecting smoke particles in the
   air.
2. Smoke that is produced due to
   fire triggers off the alarm.
3. Smoke detectors do not detect
   heat, therefore any particles in
   the air (such as dust) can trigger
   the alarm.
1.   Advantages
1.   Detects fire and discharges
     water to put out fire
2.   Greater access to seat (origin)
     of fire.
3.   Lowers smoke level.
4.   Cools smoke.

     Safeguards
1.   Loss of Lives or Property.
2.   Less interruption to
     businesses.
3.   Lesser Water Damage
     Compared to Hose Streams.
1. Water discharge is
   restrained by a heat-
   sensitive glass bulb or
   valve cap.
2. Heat from the fire causes
   the bulb to expand and
   burst allowing the water to
   discharge out of the
   sprinkler.
1. Wet pipe system.

2. Dry pipe system.
Wet Pipe System
Standard sprinkler system charged with
 water under pressure at all times

During a fire, individual sprinklers opened
 by heat, water flow through the sprinklers
 immediately

For premises where there is no danger of
 water in pipe freezing
Dry Pipe System
 Automatic sprinklers attached to piping containing
  air/nitrogen under pressure

 When sprinkler opened by heat from fire, pressure
  reduced, water pressure can force open the valve on
  supply side

 Water flows into the system and out through the open
  sprinklers

 Only used in freezing environment
    Cold rooms, freezer rooms

				
DOCUMENT INFO