The Comparison of CAF with air aspirated and unexpanded foam water solutions

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Conference8th Fire Suppression and Detection Research Application Symposium: 21 January 2004, Orlando, Florida
Pages111; # of pages: 11
SubjectCompressed air foam
AbstractAir aspirated foam is created close to or in the nozzle by entraining air with a water jet and impacting on one or more obstacles. Some of the energy of the stream is used to agitate the mixture and foam is produced. ?Foam-water? refers to a foam solution of water and foam concentrate that has not been expanded by air. Compressed-air foam (CAF) has been proven to be an effective fire suppression material for both Class A and B fires, however, the effectiveness of CAF compared to air-aspirated systems and foam water systems has not yet been quantified. While air-aspirated foam systems have been around for many years the development of high quality Aqueous Film-Forming Foam (AFFF) concentrates have allowed foam systems with little or no air expansion to be used in controlling large flammable liquid fuel fires. To effectively compare these systems a series of 22 full scale fire tests were conducted with CAF, air-aspirated foam and foam water solution using 4.64 m2 pool fire. This paper describes a series of 22 full scale Class B fire tests designed to compare CAF, air-aspirated, and foam water solution in extinguishing a 4.64 m2 pool fire in accordance with the CAN/ULC-S560-98 Standard for Category 3 Aqueous Film-Forming Foam (AFFF) Liquid Concentrates [1]. In addition to visual observations, radiant heat flux was also measured at a point 1.83 m from the edge of the fuel pan and 1.5 m off the ground.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46969
NPARC number20377061
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Record identifier09422b07-f357-4156-9cc9-45b487dee1da
Record created2012-07-24
Record modified2016-05-09
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