Flammable Gas (OSHA) 1
Flammable Gas (OSHA) 1 : "...means: (a) A gas that, at ambient temperature and pressure, forms a flammable mixture with air at a concentration of thirteen (13) percent by volume or less; or (b) A gas that, at ambient temperature and pressure, forms a range of flammable mixtures with air wider than twelve (12) percent of volume, regardless of the lower limit". Also see: Flammable Limits,?LFL,?UFL. For more information see the Flammables and Combustibles?topic page