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Scuba Forum / General / May 2004Technical Tank Question
Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately was not able to dive and tanks sat for a year. Getting ready to do some checkout dives, is there a problem w/ the air in the tanks. They are aluminum tanks so don't see a corrision issue. I don't see a problem but would like to avail myself of the knowledge/experience of those who can give intelligent guidance. Thanks. > I don't see a problem but > would like to avail myself of the knowledge/experience of those who can give > intelligent guidance. then why post here??? >From: "Lee Sanders" leesand@excite.com >Date: 5/21/2004 5:28 PM Eastern Daylight Time [quoted text clipped - 8 lines] > >Thanks. It's a thousand to one that there's a problem. That said, get them refilled. It's a pittance, and common sense. Are they due for VIP yet? Popeye "You should also know that I've already passed along your threats to the local police department, and to my lawyer.-Chris Wolf" > Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately > was not able to dive and tanks sat for a year. Getting ready to do some [quoted text clipped - 4 lines] > > Thanks. ya gotta roll them around on the floor for a while so the striated air mixes again if they've been standing or laying in one place for while.... seriously, you should have no problems. But if you want to feel better, spend the $4 or so and have them refilled.  Signaturethe most committed always win > Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately > was not able to dive and tanks sat for a year. Getting ready to do some > checkout dives, is there a problem w/ the air in the tanks. They are > aluminum tanks so don't see a corrision issue. I don't see a problem but > would like to avail myself of the knowledge/experience of those who can give > intelligent guidance. Technically, the air should be OK, although with new al tanks you might get more oxidation than you will with older ones. Practically, given the price of a fill, I'd refill em. Why don't you save yourself the headache of worry and just get them refilled with fresh air. If you're worried about the cost of an airfill - get a new hobby. Chris SignatureChris Herbruck cherbruck56@comcast.net > Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately > was not able to dive and tanks sat for a year. Getting ready to do some [quoted text clipped - 4 lines] > > Thanks. > Why don't you save yourself the headache of worry and just get them refilled > with fresh air. If you're worried about the cost of an airfill - get a new > hobby. > > Chris Geez, you guys! Tell him the truth. He needs to buy new tanks. > Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately > was not able to dive and tanks sat for a year. Getting ready to do some > checkout dives, is there a problem w/ the air in the tanks. They are > aluminum tanks so don't see a corrision issue. I don't see a problem but > would like to avail myself of the knowledge/experience of those who can give > intelligent guidance. It's life support equipment that you bought second hand. If you don't know how to look inside them, spend the $20 and have them vipped. We have all heard/seen the dead mouse story. >Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately >was not able to dive and tanks sat for a year. Getting ready to do some [quoted text clipped - 4 lines] > >Thanks. The way I see it, if something is strong enough to grow in a few hundred atmospheres of pressure, I'd really rather it didn't get into me. Since the only way you'd be able to see what's in there is to release the pressure, you won't get to breathe it anyway, so why not get 'em refilled first and not take chances? If you decide to risk it, let us know what happened. If you can. JF >>Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately >>was not able to dive and tanks sat for a year. Getting ready to do some [quoted text clipped - 8 lines] > hundred atmospheres of pressure, I'd really rather it didn't get into > me. Wouldn't the explosive decompression kill it? :) >Bought 80 & 100 cu ft tanks last year and had them filled. Unfortunately >was not able to dive and tanks sat for a year. Getting ready to do some >checkout dives, is there a problem w/ the air in the tanks. They are >aluminum tanks so don't see a corrision issue. I don't see a problem but >would like to avail myself of the knowledge/experience of those who can give >intelligent guidance. There's no clear answer. Since you did not mention getting your own hydro or visual inspection, I presume you didn't. If that's the case, you don't know what is/was in the tanks when they were filled. Chances are, there would be no problem, but you're the one that is at risk if there is one. The risk is a bit higher than it was when the tanks were first filled only because anything organic has had a year to grow. I would not hesitate to use the gas in one of my tanks that had been sitting around for a year. Then again, I know the history of my tanks. If your had the tanks inspected and know that they have only been filled at trusted shops, you may chose to use them as is without much risk. When you do, however, you're going to have to get them inspected before getting them filled again anyway. If you're planning to do more than two dives in a short period, I'd get them inspected and refilled now. Lee PS: I've got to get under by boat to clean the props and trim tabs before next weekend. I'll use an air tank that's been sitting since it's last inspection, nor more than a year ago. |
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