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PYROPHORIC METALS
DOE-HDBK-1081-94
Spontaneous Heating and Pyrophoricity
takes place with this procedure, but rapid extinguishment follows if the
technique is pursued. Well-advanced fires in several hundred pounds
(100 lb equals 45 kg) of magnesium scrap have been extinguished in less than
1 minute with two 37.5 mm (1-1/2 in.) fire hoses. Water fog, on the other
hand, tends to accelerate rather than cool such a fire. Application of water to
magnesium fires must be avoided where quantities of molten metal are likely
to be present; the steam formation and possible metal-water reactions may be
explosive.
Water on Titanium Fires
Water must not be used on fires in titanium fines and should be used with
caution on other titanium fires. Small amounts of burning titanium (other than
fines) can be extinguished and considerable salvage realized by quickly
dumping the burning material into a large volume of water to completely
submerge it. Hose streams have been used effectively on fires in outside piles
of scrap, but violent reactions have been reported in other cases where water
was applied to hot or burning titanium, resulting in serious injury to personnel.
Additional information on the use of water on titanium fires can be found in
NFPA 481, Standard for the Production, Processing, Handling, and Storage
of Titanium.
Pyrophoricity
Page 50
Rev. 0


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