pvc pipe
pvc pipe
(OP)
I'm looking for a good reference for the use of a "n" value of 0.010 or 0.011 for PVC. Client standard is minimum of 0.014.
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RE: pvc pipe
Uni-Bell PVC Pipe Association
2655 Villa Creek Drive, Suite 115
Dallas, Texas 75234
I don't have the dot address, might try "PVC Pipe"
Best Tincan
RE: pvc pipe
RE: pvc pipe
Laboratory testing of an individual length of pipe could very well produce an "n" value of maybe 0.010 or 0.011. However pipelines are not made of one continuous length of pipe, the pipelines have joints. Turbulance at the joints may cause the overall "n" value of an installed pipeline to be about 0.014.
RE: pvc pipe
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RE: pvc pipe
Best Wishes
RE: pvc pipe
RE: pvc pipe
I believe that PVC that had been in service for a number of years was measured to have values in the 0.014-0.016 range.
Hope this helps.
Regards,
MB
RE: pvc pipe
My application is for a storm drain line in arid climate. I see very little chance for slime to accumulate in my application. It will be strictly clear water with possibly some suspended fine sediment on an occasional basis.
RE: pvc pipe
However, as was eluded to in earlier posts, the jointing does in fact cause significant reduction in the "true" Manning's "n" when looking at it from a MH to MH basis.
During my days as a basin drainage modeler (we were using 386's and 486's in those days), most of the models that we set-up and calibrated found that both storm and sanitary were virtually identical in the Manning's "n" values, and 0.014 to 0.016 for older PVC pipe were fairly typical.
Hope this helps.
MB