PVC vs uPVC pressure differences??

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I want to make a small pressure vessel (capable of 50psi) out of 150mm PVC. Which is the stronger product, PVC or uPVC? And by how much (i.e. twice as stong,only a bit stronger etc.)
Regards
Dave


Read the full thread at RenovateForum.com... (http://www.renovateforum.com/f78/pvc-vs-upvc-pressure-differences-78354/)