Quote:
Originally Posted by Tristan Lall
I suspect that with the inclusion of plasticizers, a PVC pipe could be produced that did not exhibit this failure behaviour.
It's an overreach to take the position that "PVC pipe shall not be used as a means of transporting compressed air" without qualifying the pipe's composition, manufacturing process, installation and operating conditions. Despite their strongly-worded statements, I hope that OSHA is recognizing competent engineering as the appropriate way to circumvent their prohibition.
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PVC pipe manufacturers also say do not use PVC pipe for compressed air systems. The big problem is that it shatters on failure. That warning along with the OSHA statement is enough for me not to use on compressed air systems. For OSHA competent engineering means following their warnings.
One possibility is the fitting was overtightened, starting the failure.