Stack 06 : A vertical pipe on the exhausted end of the firetube which exhausts the products of combustion and creates draft through the firetube. (RP 12N)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}