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In this video I test to see if a gasometer is at risk of explosion without flame arresters on the gas lines. Air intrusion in a low pressure storage tank is always a risk, so this question is an important one. Though my conclusion in the video is that wood gas is not combustible below a 50/50 ratio with air, flame arresters are still a good precaution to take. If air is injected into the storage tank and ignited quickly enough (prior to evenly distributing) there could be a flammable pocket of gas at the correct ratios to cause ignition, in which case the top of the gasometer could be blown off and expose the rest of the gas to air. This is an unlikely, but possible scenario that a flame arrester would help prevent.
If you missed my previous videos in this wood gas/bio-fuel series check them out here:
Building a better gassifier: https://youtu.be/HQIW4dVVokE
Building a gasometer for wood gas storage: https://youtu.be/5hfznunVzKY
Thanks to all my Patrons for helping me make these videos! A special thanks to my top Patrons: Syniurge, Matthew Leitzke, TheBackyardScientist, Enzo Breda Lee, John Johnson, & Thibaud Peverelli! https://www.patreon.com/NightHawkProjects