Really as long as you want. You can store it at lower than 100 PSI for a long time, and you can store it in your basement. I really wouldn't store it with the cap off, but somehow you would need to mark it if you know it is almost at 100 PSI, because even the best divers cannot dive with 100 PSI safely. I wouldn't store it at full pressure, especially on a really hot day.
A scuba tank typically holds about 11 liters of air at atmospheric pressure.
The pressure will increase
Think on it a bit closer: -- The expansion is happening in the high-pressure reservoir, as some of the air leaves and the rest expands to fill the volume. So you'd expect the supply tank to cool as it empties. -- The compression is happening in the SCUBA tank, where you're continuously stuffing more and more air into the same volume. So you expect the SCUBA tank to warm as it fills.
No, only when it is released into the atmosphere at the ambient pressure.
A standard-sized SCUBA tank holds 72 cubic feet of air at the standard pressure of 2250 PSI.
Anything pressurised with gas - an auto tire for example, or a scuba diver's air tank.
recreational diving is usually done with 3000 psi of air in a certified SCUBA tank
The numbers on a scuba tank reveal 3 things. Serial no. of the tank. Type metal. and the current hydro date.
the amount of air in the tank per square inch. (p.s.i.)Improve answerPounds per Square Inch - so the amount of pressure exerted on the tank by the air under pressure in the cylinder of the scuba diver. The more pressure, the more compressed the air so the greater the volume of air compressed within the cylinder.for more on scuba diving, including equipment see the related link:
The best way to be sure that water does not enter your scuba dive tank when diving, is to never allow it to be completely be emptied of air pressure. Always plan to leave at least 1-2Mpa (10-20 bars) left in them to ensure that moisture does not enter. If for some reason, the scuba dive tank pressure should be completely exhausted, it is important to immediately close the valve to keep moisture out. When bleeding the air from your scuba tank, be sure to bleed the air slowly, as quick bleeding may cause internal condensation.
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
scuba tanks are under a lot of pressure, when particles are heated up, they expand and the pressure builds. if the pressure builds to the point of rupture then shrapnel will mess your car up... and if your in it, it will mess you up very bad!