cornfed
Mindless lemming
Scuba_Vixen once bubbled...
If you feel how warm a tank gets on the outside after a fill, just figure how hot it got on the surface of the aluminum inside the tank before conduction could spread the heat throughout the rest of the aluminum mass.
Darlene,
Well I figure...
In order to achieve a 400 degree (your value temp at which AL looses tensile strength) difference between the inside and outside you'd need to fill the tank (to 4000 psi) in less then 2 minutes. That's zero to 4000 in less then two minutes.
I highly doubt this happened. The guy filling the tank was clearly a moron but he didn't ruin the tank. If you're really concerned about it make the shop give you a free hydro.
Now you're free to do your own figuring if you want...
Adiabatic heating is not to be underestimated.
I don't think filling a tank is an adiabatic process. There maybe local adiabatic compression in the valves, regs, etc when you open them but in general the whole process of filling a tank is not adiabatic.
Drew