ACTIVE FIRE PROTECTIONWater-Based System

March, 2013

FIRE PROTECTION SYSTEM

• Active Fire Protection System

– Water-based system

– Dry chemical system

– Gaseous system

• Passive Fire Protection System

– Spacing and layout

– Structural protection

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• Minimize the risk

• Minimize consequence

• Prevent escalation

• Provide protection for personnel

• Extinguishing

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HOW TO DESIGN ???

Water-Based Fire Fighting – March 2013

DELUGE SYSTEM

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• Objective : Provide cooling system for equipment to prevent escalation

• Design

Fire water demand from deluge system =

equipment area X deluge rate X [ 1 + wastage factor] X [ 1 + hydraulic contingency]

Total fire water demand from deluge system

FIRE HYDRANT & FIRE MONITOR

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Objective : to provide cooling for adjacent equipment

Design : 1 monitor + 2 hydrant (active)

FOAM SYSTEM

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• Objective : extinguish hydrocarbon liquid fire

• How to design fixed foam system?

1. Determine application rate

2. Determine foam application duration

• Type of Fixed Foam Protection :

1. Primary Protection � Foam Chamber

2. Supplementary Protection � Foam Hose Line

• Output

- Foam concentrate

- Fire water required

For specified foam concentration

For specified foam concentration

FIRE WATER PUMP &JOCKEY PUMP

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JOCKEY PUMP

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• Objective : Maintain pressure at fire water piping system

FIRE WATER PUMP

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• Objective : supply FW to FW system at required pressure and flowrate

• Source energy : Normal plant supply and plant emergency power distribution system

• Start : automatically on low pressure in fire water main ring

• Number of unit : N + 1 (run and standby)

• Capacity : NFPA 20 (for single worst case in one fire zone)

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70

75

80

85

90

95

100

105

110

JP StartJP Start

JP StopJP Stop

1st FWP Start 1st FWP Start

2nd FWP Start 2nd FWP Start

PUMP MECHANISM

Water-Based Fire Fighting – March 2013