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From what I've seen on this and other lists, HP steels seem to have a reputation for rusting out not shared by LP steels. As far as getting any usable information out of a marketing brochure (esp. an OMS marketing brochure), you need a drink for the reality cup, old bean. BTW, are oxygen tanks pumped up to 3500psi? I think that the bias towards to LP steels also stems from improved buoyancy characteristics, the HPs tend to be a bit "light". Personally, I have a set of HP 100 doubles and they seem to hold air all right. I just treat them as a set of horribly expensive 80's. They are lighter than a set of al 80's and more compact. I would rather use them than my double LP 120's for most of my diving. Jim On 7/11/97 3:56 AM Sten Meyer wrote: >On Thu, 10 Jul 1997, Jim Cobb wrote: > >> >> - 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. > >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% > >Regards >/Sten > >/Sten Meyer m87stme@mt*.ch*.se* > >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send list subscription requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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