While working in the shipyard we had to enter diesel and other fuel tanks fairly often. . .they had to be ventilated for days non-stop before they would even let us enter to tour the space wearing masks. . .diesel is some nasty stuff and I wouldn't want to be one of the guys welding on a diesel storage tanks, that's for sure!was just rereading the article he stated he was welding a diesel tank , i know from the previous shop that anytime we had to work on one they guy bascially wore a hazmat type suit and outside breathing source due to some type of bacteria that can cause all types of health issues .
Refrigerant decomposes into phosgene gas when exposed to a flame or any other heat source that glows red (heated metal, a cigarette tip, etc.) and that is one of the primary gases that Hitler used in his extermination facilities during WWII (at least that was what I was told while I was in my York 1-ton R-114 unit maintenance classes. . .), that is some scary stuff, the other bad thing about it is that it's heavier than air, so if you breathe it in it's not coming right back out and can take an EXTREMELY long time to be removed from your respiratory system!The magic ingredient is clorine. Any clorinated lubricants and or solvents including refrigerants, and halons will breakdown into these extremely hazardous compounds if exposed to glowing metal (welding) or flame, like through a running engine.
Well, not quite. I machine the stuff all day long and it's not a problem. Where you get into trouble is very fine dust particles from grinding or sanding operations without coolant to keep the dust down. And even then you have to be exposed for a very long time. Kind of like black lung that coal miners get except the Beryllium attacks the liver. If your just making chips it's a non issue.Kind of like working with beryllium-copper, deadly fumes generated from simple machining.