HW C factor for relined water main.
HW C factor for relined water main.
(OP)
We are cleaning and lining old 6" dia. cast iron water mains. What Hazen-Williams C factor should I expect once completed? They are currently 16 and 31.
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
HW C factor for relined water main.
|
HW C factor for relined water main.HW C factor for relined water main.(OP)
We are cleaning and lining old 6" dia. cast iron water mains. What Hazen-Williams C factor should I expect once completed? They are currently 16 and 31.
Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesWhat is rapid injection molding? For engineers working with tight product design timelines, rapid injection molding can be a critical tool for prototyping and testing functional models. Download Now
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
|
RE: HW C factor for relined water main.
RE: HW C factor for relined water main.
RE: HW C factor for relined water main.
Better yet, can you measure the Darcy-Weisbach friction factor "f" ?
RE: HW C factor for relined water main.
RE: HW C factor for relined water main.
HW-C 120 - 140
DW-epsilon 1 - 110
Manning's n 0.012 - 0.017
good luck
RE: HW C factor for relined water main.
That should be "DW-epsilon 1 - 10"
RE: HW C factor for relined water main.
Notice e.g. that per the table "C-factors for various pipe materials" in Appendix C of the "Advanced..." reference at http://www.haestad.com/books/pdf/awdm.pdf that slightly lower C-values are given by this source for "Tate relined pipes – clean" (I believe "Tate" in fact refers to a well-known international in-situ cement mortar liner).
In any case, it appears you may have an opportunity to notably improve the flow performance.