Garry, the client has indicated that they would determine if a sacrificial or impressed system would be desirable sometime in the future, when deemed necessary to protect the pipe; they just want test stations with copper copper sulfate half cells for now. BTW, the geotech report shows that the...
Thank you for the responses. I asked my project manager if we could retain a CP engineer to review our plans and specifications but he indicated that it wouldn't be worth the cost, even though we have a healthy budget with the design at 90%.
Hello,
Finishing a CML&C steel pipeline design for the conveyance of raw water... Looking for a good reference or design manual which explicitly discusses the quantity and location of permanent reference electrodes. Our pipeline is about 5,000 feet in length and varies from 30 to 20 inches in...
Thank you! Also, for eqn. 4-39 where N phi and Q are defined below the equation, the plus (or minus) symbol between 45° and phi/2 is not showing. Could you confirm as well?
Hello,
Can anyone please confirm equation 4-35 in AWWA M23 (2nd ed)? I suspect that my copy may show the equation incorrectly, see attached. Besides the division line missing it seems that Fs and Rs should simply be added together within the denominator...
Hello,
I'm looking to understand transients by self study. I have a copy of Waterhammer Analysis by John Parmakian, is this a good place to start? Can anyone vouch for this book? Any other recommendations?
Thanks
Vertical pipe with flared end is used as a glory hole to return the supernatant of a pond to disinfection. Need to accurately determine the flow per height above the crest to establish the ponds capacity for attenuation.
I feel tempted to use the broad crested weir equation and call it a day...
Thank you for the responses. Working on a rehab for a lift station. Existing dry pit for the pumps has limited space... will probably have to use some custom steel fittings.
Do suppliers have ductile iron reducing 45 bends? Thought I saw them somewhere now I can't find them. I suppose anything can be made custom, just not sure if this fitting is uncommon or simply doesnt exist.
Hello,
See attachment. The provided solution shows the specific weight of water subtracted from the specific weight of the soil (highlighted) in determining the active soil pressure below the water table. Should it not be the specific weight of water subtracted from the saturated soil...
Yes,
and the reference at the end of the chapter is simply: Ekster, A. (2001) Personal communication
Which leads me nowhere and is not very convincing.
