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On Mon, 24 Jul 1995, Jason Erik Richards wrote: > two things to ask: > > 1> What is being used to scrub tanks and manifolds for O2 service now that > trietylchloride is no longer available? (specific names if possible.) When IBM ceased using the freon class of chemicals for the many purposes they had been using them for in manufacturing, they made an interesting discovery: Every process that they had been using freon for had a cheaper alternative. I've heard of using two things for cleaning tanks: Simple Green, a liquid soap, and 409. Both with hot (hot water tank hot, 120F-130F) water. For the 409, but a gallon bottle in a hot water bath, heat until it reaches 130F, and then pour into the tank full strength. Save it, as it can still be used for ordinary cleaning. With the Simple Green, I'm told you just make a solution. I've also heard of using TSP, but in that case you have to take care not to overheat the solution water, to avoid having it discolor aluminum. For steel tanks, use a wash of GMC's compound B(?), a flash rust preventer afterwards. A washing stand is also a good idea. I made an adapter for mine so that I could also inject air from a clean vacuum cleaner into the tank to aid drying. For one off stuff, a slow flow of O2 will work as well. You don't need much circulation. > 2> How about O2 compatible grease for o-rings? Any specific brands? I bought a tube from GMC. Nick Simicich - njs@sc*.em*.ne* - (last choice) njs@bc*.vn*.ib*.co* http://scifi.emi.net/njs.html -- Stop by and Light Up The World!
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