Blowdown stack

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A blowdown stack is a chimney or vertical stack that is used to vent the pressure of components of a chemical, refinery or other process if there is a process problem or emergency. A blowdown stack can be used to complement a flare stack or as an alternative. The purpose is to prevent 'loss of containment' of volatile liquids and gases.

The failure of the blowdown stack to contain hydrocarbons vented from a raffinate splitter led to the catastrophic Texas City Refinery explosion in 2005.[1]


  1. ^ "BP agrees to pay record $50.6m fine for Texas explosion". BBC News. October 7, 2012. Retrieved August 15, 2010. 

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