How long can a nitrox tank be stored fully filled?

[rsingler]

My 72 steel has a born date of 1964, and passed hydro last year. I know there are guys with even older ones.

 

[James79]

My 72 steel has a born date of 1964, and passed hydro last year. I know there are guys with even older ones.

How about a 1800 psi steel 38 from 1943.... I need to get it hydro'd. It's still current till December, but the vis just expired so I might as well line them back up.

 

[JohnN]

My 72 steel has a born date of 1964, and passed hydro last year. I know there are guys with even older ones.

I dive with a guy that has LP72s of that age that still have their "+" rating

 

[scubaozy]

that's nuts, just shows how strong these tanks are

It is more filling and emptying that stresses the tank, just like the passenger planes, the life is not defined by how long it flies but how many cycles of take of landing (pressurization depressurization) it endures.

 

[bletso]

Tank life is complicated. I have tested cylinders dated back to 1908 with so many hydro stamps I had to erase some to affix the new one. Not SCUBA of course but as long as not over-stressed due to over filling they can last a looong time. The safety factor is huge. I don't think Al cylinders will last that long.

 

[broncobowsher]

1908 is impressive. The oldest I have seen (and we still have here at work) is 1918.

 

[Nitrox_DiverNY]

Tank life is complicated. I have tested cylinders dated back to 1908 with so many hydro stamps I had to erase some to affix the new one. Not SCUBA of course but as long as not over-stressed due to over filling they can last a looong time. The safety factor is huge. I don't think Al cylinders will last that long.

damn 1908!

 

[chillyinCanada]

thanks for the help, learn something new everyday!

Yes, Scubaboard provides no end to learning everyday.