If you burn the gas from a gas bottle, why does the flame not propagate into the bottle?

Question

Is it because of the exit velocity of the gas?

In: Engineering

Answer 1

Bottles are manufactured with safety mechanisms in place to prevent you from going boom. Depending on the bottle size and type, some have a check valve, also referred to as a “back flow preventer” which only allows the gas to flow in one direction and prevents flame from backing its way into the food source. Some smaller bottles simply have an orifice (opening) that’s so narrow it basically eliminates the possibility of flame from chewing its way backwards. All are the same basic principle. Hope that helps.