What is this gift I received?

[RIHappyDiver]

A neighbor gifted me a steel tank this evening, hydroed (hydrod, hydro’d, I don’t know) just last year. Seems like a nice little tank, but he had no idea what it was and I can’t figure it out, either. Here on the markings on the tank. The first test stamp is 1978.

I’ll be glad to gather any extra info that might be useful. Ok, people, do your thing!

Thanks,
Erik

 

[Still Kicking]

Steel 72. Manufactured in January 1970 (first stamp). Made by Pressed Steel. Great tank.

 

[RIHappyDiver]

Steel 72. Manufactured in January 1970 (first stamp). Made by Pressed Steel. Great tank.

Ok, that’s kinda what I was thinking. I had figured the Pressed Steel, PST, and the made in ‘70, but couldn’t come up with the size, fill pressure or HP/LP. Was PST a Voit owned company? Really appreciate the info you gave me!

Erik

 

[Eric Sedletzky]

That's a total piece of crap and very dangerous to use. I would get rid if it immediately.
I'll give you an address where to ship it





Seriously, nice find,
Enjoy it

 

[Eric Sedletzky]

I just got a 2800 fill in one of mine . That makes it about an 80.

 

[rhwestfall]

That's a total piece of crap and very dangerous to use. I would get rid if it immediately.
I'll give you an address where to ship it





Seriously, nice find,
Enjoy it

like you don't have enough old school 72's....

 

[Eric Sedletzky]

like you don't have enough old school 72's....

If you know how many steel 72's you have, then you don't have enough.

 

[happy-diver]

I just got a 2800 fill in one of mine . That makes it about an 80.

When the 72 was going out of fashion we had a guy that filled them to 3365 which was the
later model steel also aluminium default standard fill pressure in Australia 25 plus years ago

What happens then after time or before time stretching steel

 

[Eric Sedletzky]

When the 72 was going out of fashion we had a guy that filled them to 3365 which was the
later model steel also aluminium default standard fill pressure in Australia 25 plus years ago

What happens then after time or before time stretching steel

To 2800 psi, nothing.
What happens when you take them to hydro pressure every year?

 

[Still Kicking]

It seems to me that the 72s that fail tend to be the ones that have been sitting for a long time without pressure cylces. They show up covered in cobwebs and dust, decades out of hydro, and they go way, way over expansion limit. It's not all 72s by any means but I notice that ones that fail seem to fit a pattern.