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<blockquote data-quote="Desdichado" data-source="post: 6025605" data-attributes="member: 2205"><p>After complaining and poking a bit of fun at all the pedantic nitpicking going on in this thread, I'm now going to add to it, since my professional interest happens to coincide here. Acetylene isn't really used for welding much anymore, and hasn't been for decades. It's still used for <em>cutting</em> but gas metal arc welding with a helium or argon shield gas has almost completely replaced acetylene except in certain niche areas. Acetylene is also highly explosive and volatile; in fact, the major supplier of acetylene in North America (from calcium carbide raw materials) in Kentucky literally blew up a couple of years ago, prompting a shortage in supply that sent us (and everyone else) scrambling for replacements. While the short-term supply issue is now past, the plant has <em>not</em> been rebuilt due to environmental and safety concerns--acetylene is now almost completely imported, or at least comes from imported carbide. The supply shortage also was the death knell of oxyacetylene welding processes; almost everyone who could easily transfer over to some other gas did so. We use acetylene for heat treatment furnaces, not for welding, so we were able to switch temporarily to propane, but long-term we still want to use acetylene because it greatly prolongs the life of the furnaces.</p><p></p><p>In any case, I find it difficult to believe that after 15 years of post apocalyptic conditions that there's going to be any appreciable quantities of acetylene floating around is my point.</p></blockquote><p></p>
[QUOTE="Desdichado, post: 6025605, member: 2205"] After complaining and poking a bit of fun at all the pedantic nitpicking going on in this thread, I'm now going to add to it, since my professional interest happens to coincide here. Acetylene isn't really used for welding much anymore, and hasn't been for decades. It's still used for [I]cutting[/I] but gas metal arc welding with a helium or argon shield gas has almost completely replaced acetylene except in certain niche areas. Acetylene is also highly explosive and volatile; in fact, the major supplier of acetylene in North America (from calcium carbide raw materials) in Kentucky literally blew up a couple of years ago, prompting a shortage in supply that sent us (and everyone else) scrambling for replacements. While the short-term supply issue is now past, the plant has [I]not[/I] been rebuilt due to environmental and safety concerns--acetylene is now almost completely imported, or at least comes from imported carbide. The supply shortage also was the death knell of oxyacetylene welding processes; almost everyone who could easily transfer over to some other gas did so. We use acetylene for heat treatment furnaces, not for welding, so we were able to switch temporarily to propane, but long-term we still want to use acetylene because it greatly prolongs the life of the furnaces. In any case, I find it difficult to believe that after 15 years of post apocalyptic conditions that there's going to be any appreciable quantities of acetylene floating around is my point. [/QUOTE]
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