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> Steve ? >I got to disagree with this. Around here, at least, the industrial gas >folks are absolutely useless. Does that mean that o2 is a simple gas to deal with? > They are used to using dedicated gear, so >problems of compatibility, tranfilling or mixing etc never arise, and are >horrified at the thought of putting O2 in anything but a big green bottle >labled O2. is it stamped o2 clean? are all its components o2 compatable? etc etc, does he check? > Plus they work by rote and have no clear understanding of the >rhyme or reason of why they do anything the way the do. Exactly > Try to corner them >and they cite vaguely remembered regulations that they swear exist, but >can't actually produce, or tell anectotal horror stories which can't be >verified. As above >The same it true, to a lesser extent, with the med O2 people. They use >dedicated gear, everything is made to fit together, and never have to stray >beyond their little dedicated world where every question has a simple yes >or no answer. Have you ever seen or heard of the room that they o2 clean everything? does it exist? >They never have to make judgements as to whether something is >clean enough, or safe enough, decisions the O2 diver has to make all the >time. I dont understand the difference, it is all o2 under pressure.. > >Besides, industrial gas handling practices often simply aren't appropriate >to tech diving - industrial gas practice is based on havng such a massive >safety margin that the gear can be neglected, mishandlend, and used and >serviced by near-idiots. O2 is o2, doesnt matter what it is used for its still o2. I have to laugh here, it sounds like half the reg service people. >Most of the bullshit about O2 and O2 cleaning one hears in the dive world >is a result of trying to directly export O2 "wisdom" from the med/indus gas >world to the tech dive world, without making any allowance for different >circumstances and realities. And. as mixtures in the nitrox range have very >few uses outside diving, and there are, as a result, not a whole lot of >hard info and test data on them. >If you want an example of what happens when you try to blindly apply >industrial standards to the dive world, take a look at our tanks - in the >USA are made to the same standard (3A and 3AA) that industrial tanks are, >tanks that are expected to be able to endure being dropped off the back of >trucks, stored outside, refilled daily, and still last 50 or so years. The >result? - the same tank that's an HP tank in europe is a LP tank here, and >holds 20 or 30 less cf (for those of us without a compressor). What the size etc of a tank has to do with this I dont know, but if it is relevant, then our Uk tanks are 50 liter at 200 plus bar,(diving oxygen grade) I believe they dont allow that in the U.S.(I am not sure, its something I was told) We have a gas booster manufacturer that has made pumps that operate up to 10,000 psi, I have one thaT Pumps to 350bar(4500psi) and I store o2 at 350 bar no problem, they have been in business for 35 years. what i mean by the industry is the people that made the system work for the man in the street,instead of making a set of rules that dont seem to apply to any other use of oxygen under pressure. > Regards -- John Thornton Owner/skipper Scapa Flow Technical & M.V.Karin Polrudden House tel/fax 01856 874761 Peerie Sea Loan Kirkwall Orkney Scotland KW15 1UH -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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