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On Wed, 12 Oct 1994 Christina_Young@Wa*.Me*.co* wrote: ...snip.... > > It would be interesting (and probably difficult) to find out how many > accidents or close calls there have been with systems that were exposed to > between 23% and 40% O2 that were not O2 cleaned. > > After hearing Glen's presentation on air quality and O2 compatibility, it > really makes you wonder if some people understand the special care that O2 > enriched systems require. I dont think that we shall neglect the problem, but oxygene has been used for welding and cutting for about 100 years. If you look at the care and treatment O2 equipmet gets at a regular scrapyard (sp?) then you would think that all scrapmerchants would be dead by now. In Sweden the Occupational Safety Administartion says that equipment used for Nitrox must comply to the same standards as equipment for 100% Oxygene. The problem is that they don't define what this standars is. I think that there answer would be: "Ask AGA or l'air Liquid" (the gas companies). Indeed until 1967 there were no rules for tanks issued by a non comersial authority. The tanks were managed by the gas companies, and they set their own rules. These rules were later adopted by the governement and there is still a paragraph saying that a tank that was put in to service before 1967 can be used without "design approval". Thay still has to be hydoed(sp?) with a five year interval. (Nobel gases and inert gases sutch as nitrogene have a ten year interval) /Sten Meyer m87stme@mt*.ch*.se*
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