Tanks: How old is too old?

[SteffenS]

I saw a set of steel tanks manufactured in 1969 that were being offered for sale, and it got me wondering: How old is too old for scuba tanks (assuming they are hydro'd and visually inspected as required)? I'm someone who maintains and repairs my gear until it can't be maintained/repaired any more, including a set of HP doubles that are approaching their fourth hydro. Just wondering if anyone has a rule of thumb (or a more learned approach) to determining when a tank is too old to be safely used.

 

[Capt Jim Wyatt]

So long as they pass a hydrostatic test age is irrelevant.

 

[p_kos]

Steel tanks are theoretically immortal if treated well. One of the shops I deal with has bank tanks from the 1920s in use. Aluminum tanks are a different story. Some shops wont fill aluminum tanks older than 20 years no matter the alloy used. Most people here will buy old steel lp72s from the 60s all day for a good price ($50-100 depending if in hydro).

 

[GJC]

And pass VIP. No significant rust, pits, thread damage and tank not gouged, bent or bowed.

Be aware that some really old steel tanks may require unusual valve thread sizes that may be harder to find if you need to replace a valve.

 

[broncobowsher]

I have seen some over 100 years old that are still in service.
1969 are probably still modern tanks. Few oddities out there. I would use them.

 

[divingdayz]

Yep, as long as those steel scuba tanks are maintained, they can last forever.

 

[SteffenS]

Good to know. Thanks for your thoughts!

 

[PR_SMITH]

My oldest steel 72 is a '59. Always passes hydro and viz

 

[johndiver999]

ask your local dive shop... They are quite likely NOT going to fill them, regardless of what people say on the internet.

 

[Johnoly]

My oldest steel 72 is a '59. Always passes hydro and viz

Wow,, Does the tank shoulder show those dozen or so hydro stamp markings?
If yes, Got a picture/vid you can post? Would be pretty cool.