Fused PVC and AWWA C-900/905
Fused PVC and AWWA C-900/905
(OP)
Does anyone have any documentation on if fused PVC meets AWWA C900/905 standards? It's my understanding that because of the fused joint there is some confusion on if the AWWA standars apply. I've heard both ways; that it does and it does not meet these standards.
Thanks!
Thanks!





RE: Fused PVC and AWWA C-900/905
http://www.undergroundsolutions.com
RE: Fused PVC and AWWA C-900/905
RE: Fused PVC and AWWA C-900/905
The article at the plasticpipe.org website starts out as if it is a news article, but in my opinion quickly devolves into a plug for HDPE. I am not an advocate for fusible PVC or HDPE, just a user of both. I will base my judgement of the quality of both products based on my experience and the experience of other users that I trust. In order to bring new innovative products into the market place some users have to be the guinea pigs, otherwise we would still be using open aquaducts and wood pipe. Sometimes we pay the price for being the guinea pigs.
RE: Fused PVC and AWWA C-900/905
From a technical perspective pronounced thermal, Bourdon, and Poisson behavior (the latter e.g. as advised by Mr. Robert Hucks [e.g. see thread http://eng-tips.com/viewthread.cfm?qid=125930 .], in a July 1972 AWWA Journal article as, "Since PVC pipe moves axially as well as circumferentially in response to pressure surges ("Poisson's ratio effect"), pipe may undergo scratching of the outside when buried and in contact with sharp stones in the backfill. This area requires further study...") could perhaps result in some different responses in a system with at least some relatively long sections of welded pipes than in a conventional rubber-gasketed joining system. I do not know if these behaviours/this history has necessarily any specific relevance to the current dispute, but it perhaps makes it a little hard to believe given same that all members of the standards committees do not have any opinion as to need for minimum requirements/basic philosophy for/ of basic sealing to pipe ends etc!
[BTW I had occasion to see some fascinating construction just a very few years ago, of course now leading into this 21st Century, of a brand new open-air "aqueduct" to transport water a considerable distance in the Andes mountains of South America. While this new aqueduct employed some modern engineering materials e.g. an underlying impermeable membrane and steel-reinforced concrete sections with expansion joints, I suspected it would function in much the same way (i.e. with general success) as had similar aqueducts built in the area for hundreds of years. The only reason I was there was to help them design and install a quite large pressure pipeline siphon, that would allow the aqueduct to pass under a quite deep canyon (a technology I don't believe at least quite as readily available to ancient engineers). I wouldn't even be a bit surprised if there is also still some "wood" out there still functioning pretty well as pressure pipe, and/or as a sort of swelling/reasonably durable lining for metal etc. pipes, in an era when cement mortar lining technology was not well available/understood. I guess it remains to be seen whether many "new" products will provide similar value.]