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Sten: >This reminds me of an old PADI text that said that the fO2 would = decrease to low levels if the tanks were left with "old" air. I found = that the tank had to contain some 10% water for the fO2 to drop from 21% = to 16% < I'm not affiliated with PADI - but that information is not specific to = them at all. In fact, I remember speaking to Jack McAniff of URI's = former dive accident research center about the specific case (which I = seem to remember dates more than 10 years back and occured in Florida). = A drowning by blackout had ocurred, McAniff requested access to the = tanks and found the cause to be insufficient PO2 of Oxygen in the = cylinder. Best Regards Andy ---------- From: Sten Meyer Sent: Friday, July 11, 1997 3:56 AM To: Jim Cobb Cc: jtshepherd1@mm*.co*; 'techdiver' Subject: Re: Tank question On Thu, 10 Jul 1997, Jim Cobb wrote: >=3D20 > - LP's are generally better than HP's for easy fills, less rust Easy fills -Yes, but less rust?? Have you read the OMS folder? If the PPo2 was a problem, then steel Oxygen tanks would be impossible, but welding tanks last some 30 to 40 years, and I've seen 25 year old 300 bar air tanks still in service.=3D20 This reminds me of an old PADI text that said that the fO2 would =3D decrease to low levels if the tanks were left with "old" air. I found that the tank had to contain some 10% water for the fO2 to drop from 21% to 16% Regards /Sten -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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