So looking at your chart, Bob.
Fuel Gas Air Lower Limits (%) Air Upper Limits (%)
Methane 5,0 15,0
Ethane 3,0 12,4
Ethylene 2,7 36,0
Propane 2,8 9,5
Propylene 2,0 11,1
Butane 1,8 8,4
Carbon Monoxide 12,0 75,0
Hydrogen 4,0 75,0
Acetylene 2,2 80
Limits for fuel gas, air and oxygen at 20ºC and atmospheric pressure.
Does this mean that at 2.2% air, the acetylene is explosive, at 2.8% air, propane is explosive, hydrogen and methane are not until it is 4% air for hydrogen and 5% for methane? And then when there is more than 9.5% for propane, or 15% for methane these gases are no longer explosive, whereas hydrogen and acetylene remain explosive until there is more than 75% and 80& air?
TIA |
