24 Questions
Which type of fire protection system is typically installed internally in tanks containing flammable or combustible liquids?
Air-foam generating and distributing devices
What is the purpose of foam chambers in large fuel storage tanks?
To supply foam solution to each foam-maker
What is the purpose of frangible seals in foam chambers?
To burst when foam pressure is applied
Which type of foam-discharge outlet is required for some alcohol-type foams?
Type I
What are central foam distributing systems?
Systems that consist of an enclosure that houses a foam concentrate supply tank and a proportioning device
What are semi-fixed systems used for?
To extinguish fires in storage tanks
What do foam-making sprinklers and deluge or spray nozzles using AFFF foams replace?
Water sprinkler nozzles
Which type of fire protection system is typically installed internally in tanks containing flammable or combustible liquids?
Foam chambers
What is the purpose of frangible seals in foam chambers?
To burst when foam pressure is applied
What do foam chambers with foam-makers installed at equally spaced positions slightly below the top rim of large fuel storage tanks prevent?
Ignition of flammable contents of the tank
Which type of foam-discharge outlet is required for some alcohol-type foams?
Type I
What is the purpose of frangible seals in foam chambers?
To prevent foam from plunging into the fuel
What do foam-making sprinklers and deluge or spray nozzles using AFFF foams replace?
Water sprinkler nozzles
Which type of fire protection system is typically installed internally in tanks containing flammable or combustible liquids?
Central foam distributing systems
What are central foam distributing systems?
Systems that consist of an enclosure that houses a foam concentrate supply tank and a proportioning device
What are semi-fixed systems used for?
To control or extinguish fires in areas where flammable and combustible liquids are processed, stored, or handled
What is the purpose of foam chambers in large fuel storage tanks?
To prevent foam from plunging into the fuel
Which type of foam-discharge outlet is required for some alcohol-type foams?
Deluge or spray nozzles
What is the purpose of central foam distributing systems?
To supply foam solution to each foam-maker simultaneously
What do foam chambers with foam-makers installed at equally spaced positions slightly below the top rim of large fuel storage tanks prevent?
Vapour from entering the foam piping
Which type of foam-discharge outlet is required for some alcohol-type foams?
Type I outlet
What is the purpose of frangible seals in foam chambers?
To allow foam to be applied to the burning surface without plunging into the fuel
What do foam chambers with foam-makers installed at equally spaced positions slightly below the top rim of large fuel storage tanks prevent?
Plunging of foam into the fuel
What do foam-making sprinklers and deluge or spray nozzles using AFFF foams replace?
Water sprinkler nozzles
Study Notes
Fire Protection Systems for Flammable Liquids
- Internally installed fire protection systems in tanks containing flammable or combustible liquids typically use a foam-based system.
Foam Chambers and Frangible Seals
- Foam chambers are installed in large fuel storage tanks to prevent fire spread and provide a barrier between the fuel and air.
- Frangible seals in foam chambers burst under pressure, allowing foam to flow into the tank and suppress fires.
Foam-Discharge Outlets
- Some alcohol-type foams require a specific type of foam-discharge outlet.
Central Foam Distributing Systems
- Central foam distributing systems supply foam to multiple areas, providing a comprehensive fire protection system.
Semi-Fixed Systems
- Semi-fixed systems are used for areas where a fixed system is not feasible, providing a flexible fire protection solution.
Foam-Making Sprinklers and Deluge/Spray Nozzles
- Foam-making sprinklers and deluge or spray nozzles using AFFF foams replace traditional sprinkler systems, providing a more effective fire suppression method.
Test your knowledge on foam systems for fire protection in process buildings and tanks. Learn about the purpose and components of a typical foam system.
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