What are flame screens used for?

Flame screens are specifically designed to prevent flames from entering tanks or other similar vessels where flammable materials are stored. They serve as a safety device that acts as a barrier against flames that could potentially migrate from outside sources into areas where flammable liquids or gases are present, thus reducing the risk of explosion or fire.

In the context of handling hazardous materials, ensuring that flames are kept out of storage tanks is critical for safety. The flame screen is typically constructed with a mesh or grating that allows vapor to escape while blocking any incoming flames, thereby helping to maintain the integrity of the storage environment.

The other choices, while they describe various safety measures related to fire and combustion, do not accurately reflect the primary function of flame screens as related to tank safety. Options that mention protecting firefighters or dealing with emanating sparks focus on different aspects of fire safety and management rather than the specific role of flame screens in preventing flames from entering tanks.