High Expansion Foam System
The high expansion foam system uses foam consisting of a synthetic foam concentrate, water and air, which is highly effective for machinery space applications.
This High Expansion Foam System is now branded Survitec.
SYSTEM DESCRIPTION AND CONFIGURATION
The Survitec HiFoam system uses a synthetic foam concentrate together with fresh/sea water and inside air to produce extinguishing foam. The system consists of foam generators, foam concentrate, foam storage tank at atmospheric pressure and other system components like water and foam pump(s), foam proportioner, distribution pipes made of galvanized steel or equivalent corrosion resistant material, strainer, valves, test-and-blow-through lines, power and control system. When the system is activated, the foam concentrate is mixed with water and discharged into protected space through the foam generators. The nominal working pressure is 6 bar at the foam generators. For optimal effectiveness it is critical that the foam concentrate is mixed with water in the correct proportions throughout the fi re fighting operation. This is secured by the proportioner that gives the right mix in the full operating range. Foam generators expand the foam mixture with use of air drawn from the protected space. The foam is discharged from foam generators over the fire risk hazards first and fill up protected space completely. The system can be manually released from the foam room by directly
operating the valves and pumps. It can also be remotely operated by a centrally located control cabinet for operational flexibility.
Activation of the System
The Survitec high foam system can be released
Extinguishing fire using High Expansion Foam
The high expansion foam suppresses fire first by separating the fuel from the air, suffocating the flames and immediately preventing further combustion. The foam then cools the area on fi re and reduces evaporation of flammable vapours into the air. This is the most effective way of starving the fi re of oxygen and cooling the objects on fi re. The high expansion foam has high resistance to heat and smoke generated during the fire.
The Survitec high expansion foam system is designed as total flooding system for machinery spaces of Category A, cargo pump rooms and other enclosed spaces onboard vessels or on offshore installations.
RULES AND REGULATIONS
The high foam system can be applied on merchant marine and offshore structures as it is designed in accordance to SOLAS and IMO MODU Code. The system is approved by all major classification societies and has undertaken a class witnessed 20 metres foam stack height test.