Halon An Extinguishing Agent Was Developed After World War II For The

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Term Paper Title	Halon An Extinguishing Agent Was Developed After World War II For The
# of Words	887
# of Pages (250 words per page double spaced)	3.55

Halon

Halon an extinguishing agent was developed after World War II for the
protection of aircraft engines. Several types were developed, and several
were banned and discontinued such as halon 104. Other types were halon
1202, halon 1211, halon 1301, and halon 2402, which was never widely used
in the United States due to its high toxicological concerns. Halon type 1101
was widely utilized for aircraft engines. The two most common types being;
halon 1301 bromotrifluoromethane, CBrF3, which is most commonly used in
fixed system, and halon 1211 bromochlorodifluoromethane, CBrClF2, which
is used in portable systems. Halons are synthetic gases, grouped under the
category of halogenated hydrocarbons, that exhibit exceptional fire-fighting
and explosion prevention/suppression effectiveness when appropriately
applied. Halon chemically interferes with the combustion process of fire
resulting in extinguishment. Halon is stored as a liquid, which then vaporizes
into a gas. Its boiling point is negative 72 degrees Fahrenheit. Halon in
non-conductive and non-toxic when used at 5 – 7 percent concentrations.
Even though it is non-toxic human exposure should be less then 15 minutes
when concentration is 0 – 7 percent. With a higher concentration 7 – 15
percent exposure should be less than one minute. Fire fighters should wear full
protective gear and SCBA’s when exposed to halon. Halon is considered a
“clean agent” it leaves no residue behind and does not cause any damage to
the applied area. Halon is used in computer rooms to safely extinguish any fire
that may happen so that minimal damage will be caused. Computer rooms that
contain millions of dollars worth of equipment. Hitachi Data Systems main
computer room in Santa Clara of Lafayette and Central is one example. This
room contains millions of dollars worth of computers. There is more computer
power in this room than any other in the United States. It is protected by a
halon 1301 fixed system, and several halon 1211 type extinguishers. Halon is
also the best extinguishing agent for flammable liquids. In a flooded type halon
system concentration should reach 5 percent concentration in 10 seconds.
During tests halon has put out a flammable liquid fire with a 20-minute
pre-burn time with a concentration of 5.6 percent. Every fixed halon system
must contain a storage vessel, which is where the halon is contained in a liquid
form. A piping system to deliver the agent to the nozzles which is where the
halon turns into its...

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