Limiting Oxygen Index Tests and the Extinguishment Tests of Typical Flammable Liquids Fire

摘要

This paper researched the limiting oxygen index of several typical flammable liquids, include ethanol, heptane and 97# gasoline, and also conducted serials ultra-fine water mist extinguish tests on these liquid fires in confined space. Experiments showed that, the limiting oxygen index of ethanol is 14.0%, and the value is 14.5% for heptane, and the value is 15.0% for 97# gasoline. Extinguish tests showed ethanol, heptane and 97# gasoline fire can be extinguished at 16.86%, 17.74% and 18.1% oxygen concentration, and the extinguish time is 633s, 432s and 336s. Test results showed that the liquid fire is more easily to be extinguished which with higher limiting oxygen index.