tank markings......

[The Horn]

Just recieved two tanks for free as they may or may not be any good. They are steel and are from 1985 I believe and are fitted with J-valves.

Here is the data on the tank: DOT - 3AA2250
85799S
Pst
3 76+

Last hydro was in 95. They both have about 300 psi in them

Am I correct in the fact that they have a working pressure of 2250 and are 76 cubic foot tanks?

Thanks for any help.

If they vis out/hydro ok I might put new V/V's on

 

[Don Burke]

It looks like the initial hydro was March of 1976.

2250 is the working pressure. I can not tell the size from here.

I would measure the length and diameter and see if there is a match on the cylinder charts. They were made by PST.

Just recieved two tanks for free as they may or may not be any good. They are steel and are from 1985 I believe and are fitted with J-valves.

Here is the data on the tank: DOT - 3AA2250
85799S
Pst
3 76+

Last hydro was in 95. They both have about 300 psi in them

Am I correct in the fact that they have a working pressure of 2250 and are 76 cubic foot tanks?

Thanks for any help.

If they vis out/hydro ok I might put new V/V's on

 

[Scared Silly]

Given the first hydro date 3 76+ (March 1976) more than likely they are 72s. Steel tanks do not always have their working volume on them. But given they are 30 years old the are probably 72.

The workng pressure is 2250psi. The "+" after the 76 means that for that hydro and five years there after they could have a 10% overfill. The over fill test must be done at each hydro. So when you get them hydro tested again ask for the overfill testing to be done as this is not done automatically.

 

[fweber]

Yea, what he said, 2250=Serv. Pres., PST=Pressed Steel Tanks, 76+, means manufactured in 1976 and allows 10% overfill, rated capacity at 2479psi probably 72cf, find a hydro shop that will plus stamp if they qualify.

Good find, very close to neutral when empty, and usually around 3-4 pounds lighter than an aluminum 80(which is really only 77cf). Take the appropriate amount of lead out of your kit and enjoy, after having had them hydro'ed.

 

[Cheekymonkey]

Is it just me or is there some info missing? Or is this just the way older tanks were marked?

 

[SparticleBrane]

That's just how older tanks were marked. There was no REE number marked on them so doing the + for 72s is somewhat difficult unless you know that number.
Most places will give you the "overfill" (bringing it to 72) anyway, without the plus.

 

[Cheekymonkey]

Yea,I always thought there was a marking regarding the cubic feet though

 

[SparticleBrane]

Nope.

 

[Cheekymonkey]

Thanks sparticle

 

[SparticleBrane]

In fact I believe many steel tanks today still don't have cf markings, especially the Faber LP series but I could be wrong. Can anyone confirm?
I know the Worthington X-series and the PST E-series have cf markings.