A flame arrestor is a safety device designed to prevent the propagation of flames in industrial settings. It works by allowing gases to pass through while cooling and extinguishing any flames that may attempt to travel back through the system. This is crucial in environments where flammable gases, such as those found in petrochemical or natural gas industries, are present. Flame arrestors are typically installed in pipelines, vents, and storage tanks to protect equipment and personnel from fire hazards. They come in various designs, including mesh, perforated plate, and cylindrical types, each suited for specific applications and conditions.