Noncombustible hydrogen gas containing atmospheres and their production
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United States of America Patent
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Apr 1, 1997
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app pub date -
Sep 15, 1995
filing date -
May 3, 1995
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Abstract
A method for extinguishing hydrogen fires comprises introducing to the hydrogen fire a fire extinguishing concentration of 1,1,1,2,3,3,3-heptafluoropropane and maintaining the concentration until the fire is extinguished. The method includes heptafluoropropane at a range of 13-30% volume/volume in the air. The fire extinguishing methods also include the use of heptafluoropropane in blend with other fire extinguishing compounds. Also disclosed are atmospheres of hydrogen, an oxidizer, and a sufficient amount of 1,1,1,2,3,3,3-heptafluoropropane to render the atmosphere incapable of supporting combustion of the hydrogen, as well as related methods for preparing such atmospheres.
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