is a tall stack equipped with burners used as a safety device. Flares are used for the combustion and disposal of combustible gases due to emergency relief, overpressure, process upsets, startups, shutdowns, and other operational safety reasons.
Planned flare events
occur during scheduled maintenance, the start-up of a process unit, or other activities where a refinery or related source can reasonably anticipate the need to dispose of any excess refinery gases these activities may produce.
Unplanned flare events occur during emergencies caused by an equipment breakdown, power outage or other upset beyond a refinery's control, when flares are used to safely burn compressed gases that could otherwise pose potential risks to workers, the community or the environment.