Flame Arrestor Housing : An enclosure which contains the flame arrestor element and may contain mechanical devices such as mixer, air controller, etc. It bolts to the breeching. (RP 12N)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}