Abstract: In order to further quantify the performance characteristics of compressed air foam, the fixed compressed air foam extinguishing system was adopted, and the performance of compressed air foam and conventional suction foam on fire control, fire extinguishing, reignition and fire resistance was investigated through standard oil-pan fire comparison test, and multiple performance indexes of the two characteristic foams were tested. The results show that: Based on the same fire experimental model and test method, the two type of foam can put out 92# gasoline fire and oil fire has not been reignited, but under the condition of low intensity of extinguishing, the fire control, cooling, extinguishing, burn resistance of the compressed air foam is obviously better than the suction air foam under the condition of high fire intensity. The basic performance characterization shows that the compressed air foam has more solid thin membranous tissue, and the low temperature environment has a maintenance effect on the compressed air foam structure group, there will be no freezing phenomenon. Using CAF sprinkler can generate high-quality foam fire extinguishing agent and it can uniformly cover the protected area without blind spots, which broadens the application mode of compressed air foam, and has certain guiding role in the follow-up focus on the indoor fire safety demonstration of tall and high-risk buildings with compressed air foam.

Key words: compressed air foam, suction air foam, CAF discrete nozzle, fire fighting and burn resistance efficiency