|Types of Fires
Generally speaking, there are five classes of fires as
defined at below. Halon fire suppression systems and some
of their alternatives are being used quite effectively on
the first three, Classes A, B and C. Halon fire suppression
systems are not recommended for use on the other two classes,
D and K, where specialized agents are usually employed.
Classification of Fires Class Description
A Fires in ordinary combustibles such as wood, cloth, paper,
rubber, and many plastics.
B Fires in flammable liquids, oils, greases, tars, oil-base
paints, lacquers, and flammable gases.
C Fires that involve energized electrical equipment.
D Fires of combustible metals, such as magnesium, titanium,
zirconium, sodium, lithium, and potassium.
K Fires that involve cooking appliances with flammable cooking
oils and fats, vegetable or animal.
Fire Suppression System Methods of Applying Fire Extinguishing
There are two common methods for applying fire extinguishing
agents: (1) total flooding and (2) local application. In
addition, there are two rather specialized applications
(3) explosion suppression and (4) inerting against explosions
and fires. The explosion suppression and inerting applications
are not discussed further in this report due to their specialized
nature and, relatively speaking, limited market presence.