How do flame screens installed on sewage system tank vents prevent explosions?

The role of flame screens installed on sewage system tank vents in preventing explosions is primarily to block flames from entering the tank. When there are flammable gases present, a potential ignition source could ignite these gases, leading to an explosion. A flame screen acts as a barrier to stop flames from outside sources from getting inside the vent and contacting these gases.

While dissipating heat can mitigate the severity of a fire, it is not the primary function of a flame screen. The primary design and intent of flame screens is to ensure that an external flame cannot reach the tank where volatile gases may accumulate. This means that their placement and design are focused on preventing the ignition of the flammable atmosphere within the sewage system’s components.

Gas pressure release and backflow prevention are also critical components of sewage system safety, but they do not directly relate to the function of flame screens in averting explosions due to external ignition sources.