Old 09-02-10, 08:18 PM
  #12  
dscheidt
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Originally Posted by AdamDZ
I will keep it at 80psi, I don't think that's too dangerous. Plus it'll be inside a pannier so I should be fine. 160psi? Oh wow, so I should be well within safe limits around 80psi.
If I remember correctly, Coca-cola is carbonated with 3.7 volumes of CO2. (meaning every liter of coke has 3.7 liters of C02 disolved in it, at least until you open the bottle). That's pretty typical, though pepsi is higher. Looking at a handy chart published by Zahm & nagel (who make carbonation equipment, among other things) for the solubility of CO2 in water (soda is close enough to water to not make huge changes in the result), we find that 3.7 volumes of CO2 at 32 F has a gauge pressure of about 17psi. At 68 F, gauge pressure is 48 psi, and at 100F (which is as high as the chart goes), it's about 85 psi. Soda bottles are going to be exposed to temperatures of at least that (think about leaving one in trunk of a car in summer), so I doubt your outside of the expected safety range.
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