Flame arresters function by which mechanism?

Flame arresters function by which mechanism?

• A. Absorb heat from a flame and thereby prevent flame transmission
• B. Increase flame temperature to intensify burning
• C. Filter impurities in gas stream
• D. Act as a spark arrestor only

Answer: (A)

Flame arresters work by cooling the flame as it tries to propagate through a restricted path. The metal channels or labyrinth provide a large surface area and long travel path, allowing heat to be absorbed from the flame. This heat extraction lowers the flame temperature enough that the gas mixture can no longer sustain combustion, effectively quenching the flame and preventing it from traveling back toward the fuel source. It’s a heat-absorption, quenching mechanism rather than a filter or a device that simply increases burn intensity. While some devices may also serve as spark arrestors, their primary protective action is cooling the flame to stop transmission.

Flame arresters work by cooling the flame as it tries to propagate through a restricted path. The metal channels or labyrinth provide a large surface area and long travel path, allowing heat to be absorbed from the flame. This heat extraction lowers the flame temperature enough that the gas mixture can no longer sustain combustion, effectively quenching the flame and preventing it from traveling back toward the fuel source. It’s a heat-absorption, quenching mechanism rather than a filter or a device that simply increases burn intensity. While some devices may also serve as spark arrestors, their primary protective action is cooling the flame to stop transmission.