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About Labs

070715-001 Bottle burst tests
Date 15th July 2007
Tested by PK and GK.
Location Sydney, Australia <Lab1>
Test Procedure Burst Test


  • To test at what pressure the bottles will fail.
  • To test at what pressure a Robinson coupling will fail.

Experiment Setup

The standard hydrostatic burst test procedure was used to carry out these tests. (See above). These tests were carried out under water about 40-50cm below the waterline to contain debris and for sound suppression.


We submerged the bottles under test to contain the noise..
Two 2L Robinson coupled bottles failed at 165psi.
Preparing to test a 2L bottle.
A typical 2 L bottle failure. Splits down the side.
The coupling still retained some of the plastic from the failed bottle.
Stress fractures in the base of a 2L bottle after being subjected to 140psi.


Burst Pressure
Burst Pressure
2 L 165 11.4 This is a standard straight walled 2L bottle. The wall has a small ridge in the middle of it. Typically contains Pepsi. The bottle burst on the side.
2 L and 2.25L
165 11.4 A 2L bottle as above and a 2.25L bottle were coupled base to base using our standard 8mm Robinson coupling with three thick hard rubber washers. It appears the bottle burst again on its side and the crack propagated to the coupling hole. From there the cracks fanned out from the hole. There was significant damage all around the coupling. The 2.25L bottle was stretched but otherwise undamaged.
2L - - A standard 2L bottle again but this time without the central ridge on the flat section. We pressurised this bottle to 140psi. We stopped the pressurisation and held it for 40 seconds. During this time the bottle continued expanding and air having entered it it started floating to the surface. We aborted the test and let the pressure out. The bottle was stretched considerably. Normally the bottle has a 2280ml capacity, but after stretching it held 2360ml unpressurised.
2L 150 10.3 Same bottle as above. We pressurised it to 130psi and held it at that pressure for 3 minutes. No visible continued inflation could be seen. Then we slowly increased the pressure and the bottle failed at 150psi.


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