AWWA C909 pipe 2

[NADOR123]

Hi everyone,

Is anybody familiar with PVCO pipe and the main differences between C909 and C900. Is there any Deflection issue using C909 since it has less wall thickness than C900.
Is there any website to get more information? I was looking for any evaluation study for C909 VS C900.

Thank You

 

[bimr]

http://www.eng-tips.com/viewthread.cfm?qid=66654

http://www.dipra.org/pdf/dipVsPVCO.pdf

http://docs.google.com/viewer?a=v&q=cache:WVYyB92qaxgJ:

http://www.paceengrs.com/whitepaper...jIxE2p&sig=AHIEtbQ7i766gKI3mEi1P46ZtA3MLn706Q

http://www.paceengrs.com/Publications/PART 2 What type of pipe do you want lying in your bedding.pdf

 

[bimr]

Our local experience is that the C909 pipe is not as available as other pipe materials and the price difference is not significant enough to call for greater usage. The C909 is considered equivalent to C900.

 

[rconner]

You might read the direct comparison ring crushing testing of DIP vs pvc (pages 5 and 6 of

http://www.dipra.org/pdf/DIPvsPVC.pdf

) and then DIP vs pvco (pages 7-9 of

http://www.dipra.org/pdf/dipVsPVCO.pdf

) and then compare at least the test results concerning short term stiffness of the pvc vs the pvco from both documents. As comparative ring stiffness of pipes is heavily influenced by wall thickness as well as material properties, you will find pvco is considerably less stiff than pvc of the same pressure class, and both are in turn CONSIDERABLY less stiff, when even “short-term” values are considered, than ductile iron pipe.
The long-term stiffness of plastic pipes (slower than 1/2" on diameter per minute, load application, not reported there) is incidentally, typically just a fraction of the value obtained for plastic pipes in the short-term, parallel plate loading tests.

The significance of this is summarized by DIPRA in both these publications, “”Because pvc(o) pipe has far less stiffness than Ductile Iron, the importance of soil stiffness is greater for pvc(o). This means that with pvc(o) pipe, bedding conditions and on-the-job installation inspection are much more critical.”