What size tank is this?

[Vosss]

I got this in a package deal and I am going to resell it but not sure of the size. I know how to read most tanks but this one has me fooled. It's a stubby steel, about 1/2 the size of an XS 100 but a little fatter. These are the markings, I know what all the first row means.

DOT E9791 - 3500 TP5250
IA 764613
81

Thinking the 81 is the size but not sure.

 

[guruboy]

Length and circumference?

 

[Got2Go]

Probably a PST 65 (67 cu Ft).
If so, should be 7.25" OD, same as HP100, and about 16.75" tall.

 

[tbone1004]

PST HP80 it looks like, but it shouldn't be any fatter than the 100's.

 

[DEdiveguy1]

You would need to post the diameter and length (to the neck) in order for anyone to know with certainty.

 

[Vosss]

It's 7.25 x 17

 

[tbone1004]

It's 7.25 x 17

so the 7.25 should be the same as the 100 that you're comparing it against. It may be plus or minus a bit due to the galvanizing process, but they're the same nominal dimensions. At 17" it's a stubby PST HP65. Should have the same buoyancy characteristics as most 3442 steel bottles with a few expections. The Worthington 100's being the exception and about 1.5lbs more negative than the normal ones

 

[DEdiveguy1]

After consulting my references, I concur with T-bone. It is the PST 65. No other PST is that close to those dimensions. Empty weight for your cylinder is about 26#. Buoyance ranges from empty at -1.5 to full at -6.4.

 

[Got2Go]

Probably a PST 65 (67 cu Ft).
If so, should be 7.25" OD, same as HP100, and about 16.75" tall.

 

[Vosss]

Thanks everyone for your help, much appreciated !!