Tank Hydro Help

[cdacda13]

I have a tank that is a 3 year tank, but to my understanding, it might have been changed to a 5 year tank, but I dont know.
I was wondering if the code on it could tell me if it was a 3 or 5 year tank?
The code is " DOT-E 9634-3000"

[Dayspring]

Who makes the tank? Luxfer or Carleton?

[FallNAngel]

I have a tank that is a 3 year tank, but to my understanding, it might have been changed to a 5 year tank, but I dont know.
I was wondering if the code on it could tell me if it was a 3 or 5 year tank?
The code is " DOT-E 9634-3000"

AFAIK, E-9634 is not an exception to the 3 year rule. It should still be a 3 year tank.