[6] They may also use welding torches to seal doors and motion trackers to detect unseen enemies. (en.wikipedia.org)
Bayer says he was able to hold a piece of Greensulate in his hand, blast the panel with an acetylene welding torch, and not feel heat on the other side. (scientificamerican.com)
Air is 21 percent oxygen; combine pure oxygen with acetylene, a chemical relative of methane, and you get an oxyacetylene welding torch that burns at over 5,500 degrees Fahrenheit — the hottest fire you are likely to encounter. (discovermagazine.com)