WTB LP72s

[kwinter]

Takes me 30 seconds to sand blast them clean. Takes me 6 months to break out the sand blaster and set it up. Yes, 2 weeks of tumbling 'might' clear it out, or maybe 3 weeks; not worth the effort that way. But if you get any with the liner, I'll trade one in hydro for two with liners.

I might take you up on that. TJ. I have a buddy with 2 lined tanks he hasn't used for years since he can't get a VIP.

[Kelly Jessop]

I'm looking for a couple of the older LP72 2250psi steel tanks.

Prefer picking up/meeting in Orlando or Cave Country.

Tanks must be verified to not have the liner in them.

I have two without a liner that I don't need,but out of hydro. PM me if interested.

[rick00001967]

at the risk of opening an old discussion topic.....what is the real problem with the tanks with the "liners" ? our shop still has quite a few in rentals and they are used regularly. i myself bought a pair to use for sidemount. they are from the late 1960's and according to the tech at the store, the "liner" is in perfect condition.
i had been told by someone that these should not be used with higher O2 mixes but the store tech said that was untrue. not sure who to believe. not really an issue for me as i have no reason to use any mix other than air at this point. but for future use it would be nice to know the truth.
thx

[kwinter]

The bigger issue is that the inner surface of the tank can not be inspected. Some people are willing to pass a cylinder if the lining is intact and not peeling. Others like me feel that it is impossible to tell what is going on under that lining even if it is intact.

[rddvet]

The bigger issue is that the inner surface of the tank can not be inspected. Some people are willing to pass a cylinder if the lining is intact and not peeling. Others like me feel that it is impossible to tell what is going on under that lining even if it is intact.

Thats what I was taught. Dont approve them because just because the liner looks great, doesnt mean the tank underneath isnt pockmarked with problems.


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[RGU]

Thats what I was taught. Dont approve them because just because the liner looks great, doesnt mean the tank underneath isnt pockmarked with problems.


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I would like to know how many of those evil lined steel 72's failed to pass after tumbling or sand blasting. I have a few of them still used now and then which is more than I can say for the aluminum 80's purchased 10 years after the 72's. They (aluminum 80's) are gone with cracked necks.

[rddvet]

I would like to know how many of those evil lined steel 72's failed to pass after tumbling or sand blasting. I have a few of them still used now and then which is more than I can say for the aluminum 80's purchased 10 years after the 72's. They (aluminum 80's) are gone with cracked necks.

You're talking to different animals. Once the liner has been tumble or sandblasted out you can properly inspect them. I was taught if the liner is still in place you can't 100% confirm that they're ok.

[skip]

I would like to know how many of those evil lined steel 72's failed to pass after tumbling or sand blasting. I have a few of them still used now and then which is more than I can say for the aluminum 80's purchased 10 years after the 72's. They (aluminum 80's) are gone with cracked necks.

I have passed 6 tanks and failed 2 due to severe pits in the bottoms after liner was removed. But the liners were obviously compromised before tumbling so we expected a pitting problem. We did not hydro them - they failed the visual inspection. The other 6 were either clean and smooth liners, or possible small cracks in the line and came out shiny and smooth like new after tumbling. Used in partial pressure blending nitrox with no issues for many years and still in service as far as I know. But if you can't see the inner surface of the steel tank because it's covered, then you can't really fulfill the obligations of a visual inspection and so should not pass it. You can assume since the liner is fine that the tank under the liner is fine too, but it will always be an assumption.

skip

[MarkR]

I have passed 6 tanks and failed 2 due to severe pits in the bottoms after liner was removed. But the liners were obviously compromised before tumbling so we expected a pitting problem. We did not hydro them - they failed the visual inspection. The other 6 were either clean and smooth liners, or possible small cracks in the line and came out shiny and smooth like new after tumbling. Used in partial pressure blending nitrox with no issues for many years and still in service as far as I know. But if you can't see the inner surface of the steel tank because it's covered, then you can't really fulfill the obligations of a visual inspection and so should not pass it. You can assume since the liner is fine that the tank under the liner is fine too, but it will always be an assumption.

skip

Skip, I am not sure if the two 72s I got from you fall into this group.. But they just passed VIP at Amigos and should be back from Hyrdo on Wed. (FYI)

Mark