Blowdown

Blowdown may refer to:


 * Windthrow or forest blowdown, a felling of trees by windstorm
 * Blowdown stack, a vertical containment structure at a refinery or chemical plant
 * Blowdown, a process plant controlled or emergency depressurization
 * Boiler blowdown, a steam-boiler process to remove impurities
 * Blowdown, a television series focusing on explosive demolition
 * accidental pressure loss in a nuclear reactor pressure vessel