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You are here: Experts > Industry > Industrial Health and Safety > Industrial Health and Safety > Fire
Expert: Mike Smith - 11/6/2009
Question
In Industry ,we install a flame arrestor on the vent of tanks containing flammable liquids,so that external fire or spark doesn't propagate back to the tank through the tank.
How does the fire does not travel back to the cylinder or the pipe in case of a domestic cooking gas stove.
Answer
Hi Kantilal,
Venting gas back through stacks has been around for a long time. And it works.
The idea is that the cylinder you refer to is under pressure until it reaches the top of the stacks where it is ignited. If we remember back to fire behavior we know that when the gas is in the lines it is to rich to burn. It only burns when the air mixture (At the top of the stacks) reaches it's flammable range. In order for fire to burn it must have 1. Fuel 2. Heat 3. Oxygen or 4. A chemical chain reaction. When the gas (Fuel) mixes with air (Oxygen) and the spark arrester (Heat) come together we burn it off. If the (Heat) trys to go back into the lines, it becomes to rich (Removes Oxygen)to burn.
I hope this helps. It is a complex process.
Goos Luck,
Mike
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