how much pressure can a 2-liter soda bottle take?

Basically, if I released CO2 into the bottle, how much pressure can it take before it explodes if external conditions are at 1ATM and ~70F?

And how much pressure is safe to fill it without fear of explosion (safety limits).

This is an empty standard coke/sprite type bottle.

7 Answers

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  • 1 decade ago
    Best Answer

    You would have to do a bit of research: You need to know the dimensions of the bottle: Diameter and wall thickness.

    You need to know the plastic it is made from and the corresponding tensile strength (yield) of the material. Then you can update these calculations:

    Assuming that the diameter of the bottle D=5 inches, wall thickness t = 0.025 inches, and the plastic has a yield strength of 5000 psi:

    The hoop stress in the wall of the bottle = PD/2t

    The longitudinal stress in the wall = PD/4t

    For this pressure vessel situation, those 2 stresses are orthogonal and and the principal stresses s1 and s2, the von mises failure theory suggests that the stress levels are acceptable if: sqrt(s1^2 - s1*s2 +s2^2) < yield, so:

    sqrt((PD/4t)^2 - (PD/4t)*(PD/2t) + (PD/2t)^2) < 5000

    expanding and collecting the LHS =>

    0.433 P D / t < 5000

    Filling in the example numbers, P < 57.7 psi

    And ofcourse with anything safety related, a safety factor should be applied in proportion to the risk severity. In this case an exploding bottle probably would not cause death, but could cause serious injury - A safety factor of 5 is likely appropriate... thus, assuming the example numbers are about right, you should not pressurize to more than 57.7/5 = 11.5 psi (this is delta compared to 1 ATM)

  • hintz
    Lv 4
    3 years ago

    Soda Bottle Pressure

  • 3 years ago

    it is not any longer risky in any respect. you may want to get sprayed with some foam from the consequent geyser, even if it washes off.....have self belief me. to make sparkling a previous person's answer, it does no longer might want to be weight-help plan soda, it is purely that weight-help plan soda would not contain syrups or sugars that turn sticky and are puzzling to freshen up. it truly is how the trick works: Mentos contain a protien (in many situations guar gum or gum arabic) that breaks down the floor rigidity of the bubbles in soda. for this reason, at the same time as the protein is presented into the soda, the bubbles will immediately strengthen and get away the bottle contained in the way in which a possibility (direction of least resistance). The structure of the mentos also facilitates, as mentos have an really not undemanding floor for the bubbles to adhere to. so, besides, that is a chilled little element to attempt, and it is thoroughly harmless (do it outdoors!!)

  • 1 decade ago

    You can test for this, but when you do - use water or some other liquid. It is incompressible, and the pressure will be relieved by the smallest change in volume once the bottle cuts loose.

    If you do this testing with a gas, you are compressing a big spring, and the resulting release of energy when the bottle fails will be large.

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  • Anonymous
    1 decade ago

    you cant pressure test it withour the right fitting on the top.

    My guess is 75PSI as it is recycled plastic.

    We did a test on Recylcled plastics and the results were averaged out at this in 2004

  • 1 decade ago

    I do not know, but if you pu the Works(toilet bowl cleaner) and little balls of cooking foil shake it up with the cap on the throw it or run away it explodes. It's pretty fun to watch, sorry i didn't answer you question.

  • 1 decade ago

    Not much....

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