Help me ID a tank

[Spg01]

I was given a steel HP(3500 psi) 100 tank (300 DIN) from someone who quit diving a few years back and I want to find out who made it so I can get a similar 2nd tank.

There is no manufacturer info on the tank that I could find. But the serial number starts with a C. I was told it might be a catalina, but looking at the catalina website all they talk about are aluminum tanks and not steel.

Is there anothe way to find the manufacturer? The tank is at the shop getting filled, so I can't get more infor right now.

Is it worth it to worry about it? I figure I would want a tank as close to the same specs as possible? I imagine all steel 100's do not have the same characteristics.

Edit:
I did write down DOT-E9791-3500 TP5250 Original hydro 7/95.
So I am thinking it is a PST??

 

[Scared Silly]

Yup PST the exemption number, E9791 is theirs.

 

[Spg01]

Is there a comparison table of all the hp 100's with specs?
Currently I am just hitting some of the bigger on line sites trying to compare everything.

 

[spectrum]

Here is one such table.

Pete

 

[Spg01]

Thanks

 

[bradlw]

old thread, it answers part of my question
I have a set of doubles that I put together from used tanks twenty some odd years ago. I can't remember what they were. Still holding trimix....tag specifying the blend is long gone.

I understand from this old thread they are made by PST
how can I confirm the capacity and bouyancy characteristics?
I think they MIGHT be PST-100
roughly 2 inches shorter than my Al80

PST 100
3500psi, 102ft3, 7.25 in diameter, 23.94 inch tall, 34.1# empty, -1.3# bouyancy empty, -8.8# bouyancy full

in the plastic boots, they stand approx 24-3/4 inches to the top of the neck
marking is
DOT-E9791-3500 TP5250
239710 GALVANIZED USA

Do I have it correct?

 

[T-Ray]

I’m trying to figure out the same thing. Just bought two used tanks. Same markings but the guy didn’t know the capacity. Thanks!

 

[Boarderguy]

Take the valve off and weigh it. Fill it with water and weigh it again. Water is 2.2 lbs per liter. You can do the math from there based on psi rating.

 

[Scared Silly]

I think they MIGHT be PST-100

Do I have it correct?

From my recollection you are correct HP100. Remember as they are 3500psi the valves are 7/8 UNF.