Elmo wrote in
:

On Thu, 8 Apr 2010 06:12:08 +0000 (UTC), Elmo wrote:

So, I'd say Coke's report that all their bottles can handle 150 psi
seems reasonable as the MOP (maximum operating pressure) for PETE
bottles.

Despite both Coke's statements and independent tests showing coke
bottles exploding well almost at 200 psi, the mythbusters seem to
intimate they explode at the much lower 150 psi pressure.
http://en.wikipedia.org/wiki/MythBus...2005_season%29

So, I'm confused.




Explosion occurs at 150psi.

I think your confusion comes from some poor wording at that Wiki site.

This quote:
"The Build Team also found that water cooler jugs, while able to launch
higher at the standard air/water ratio for water bottle rockets, were
weaker than standard soda bottles (which are designed to hold carbonated
liquids), failing at around 60 psi (413 kPa) less than the soda bottles
(90psi (600kPa) as opposed to 150psi (1000kPa))."

might read more clearly as:
"The Build Team also found that water cooler jugs were able to launch
higher at the standard air/water ratio for water bottle rockets. However,
the jugs were weaker than standard soda bottles, failing at around 90 psi
(600 kPa), much less than the soda bottles, which fail at 150psi
(1000kPa)."

The intermixing of English and Metric also adds to the confusion of the
Wiki page's wording.




--
Tegger