KEY FEATURES: 40-foot s/a (self-aspirated) flare stack. 2005 Alberta Flares model. Stack is used to combust waste gases and liquids at the top of the stack, which is typically elevated for safety reasons. Flare line size: 4 inches. Weight: approximately 4,000 lbs. Height: 40 feet, a standard height for elevated flares. Purpose: to burn waste gases and liquids, reducing emissions and providing a controlled burn. Function: the flare line carries the gases and liquids to the top of the stack where they are ignited.