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The gases that we are concerned with are flammable
         with combined with oxygen in air.

             There is about 21% of oxygen i air.
             Th    i b t         f        in i

Lower explosive limit. The Concentration of flammable
    gas or vapor in air below which the gas is not
                       explosive.

Upper explosive limit. The concentration of flammable
   gas or vapor in air above which the gas is not
                      explosive.
                          Range
                    Methane – 5% to 15%
                    Propane -1.5% t 9%
                    P        1 5% to

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LEL & UEL

  • 1. The gases that we are concerned with are flammable with combined with oxygen in air. There is about 21% of oxygen i air. Th i b t f in i Lower explosive limit. The Concentration of flammable gas or vapor in air below which the gas is not explosive. Upper explosive limit. The concentration of flammable gas or vapor in air above which the gas is not explosive. Range Methane – 5% to 15% Propane -1.5% t 9% P 1 5% to