Anyone ever check their tanks outer skin temperature after a drive of 1 or 2 hours? My tanks get cold and the drop in temp seems related to the amount
of psi pulled off and I suspect it is also related to the rate that fuel is used from the tank. I shot infared temp of tanks the other day after driving home from Broken Arrow OK. The surrounding area was 55 degrees but the tanks
were 46 degrees. I suspect the gas inside is actually cooler. I also think
that is why the psi doesnt go down on a long drive in a linear fashion. If your tank temperature was static then the psi use would be a straight line. But the tanks cool off alot at first and then begins to slow down on the temperature differential as you continue to drive and so the psi change slows down also. The temperature to pressure ratio is linear it is the tank temperature that isn't. I hope to install a remote sending psi gauge in the Impala soon so I can directly watch the psi drop. If I could get a cold fill of gas to 3600 psi right before starting a trip I would get at least one extra gallon and still be in the specification of the tank, or is the tank rating based on the temperature being at 70 degrees and would a 3600 psi fill at a lower temp compromise the tank safety? I know it would if you let the tank warm up after a cold fill. I think you are only allowed a 10% overage of the tank
pressure rating and then you begin to enter danger of compromising tank safety. But what if you never let tank pressure exceed 3600 and you stay at a lower temperature?
of psi pulled off and I suspect it is also related to the rate that fuel is used from the tank. I shot infared temp of tanks the other day after driving home from Broken Arrow OK. The surrounding area was 55 degrees but the tanks
were 46 degrees. I suspect the gas inside is actually cooler. I also think
that is why the psi doesnt go down on a long drive in a linear fashion. If your tank temperature was static then the psi use would be a straight line. But the tanks cool off alot at first and then begins to slow down on the temperature differential as you continue to drive and so the psi change slows down also. The temperature to pressure ratio is linear it is the tank temperature that isn't. I hope to install a remote sending psi gauge in the Impala soon so I can directly watch the psi drop. If I could get a cold fill of gas to 3600 psi right before starting a trip I would get at least one extra gallon and still be in the specification of the tank, or is the tank rating based on the temperature being at 70 degrees and would a 3600 psi fill at a lower temp compromise the tank safety? I know it would if you let the tank warm up after a cold fill. I think you are only allowed a 10% overage of the tank
pressure rating and then you begin to enter danger of compromising tank safety. But what if you never let tank pressure exceed 3600 and you stay at a lower temperature?
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