Hi All,
I'm trying to figure out how the "Pipe Size Library" within the Network Design Wizard is intended to be used. To start, I've already prepared a pipe size library which is based on the minimum full bore velocity of 1m/s for each pipe diameter. See the attachment "Custom Pipe Size Library.png".
I cannot seem to get the Network Design Wizard to respect these figures. There must be some sort of hierarchy, behind the scenes, which determines which option/check box supersedes another. It's not immediately apparent.
If I uncheck the "Check Velocity" box, the design wizard will refer to the "Min. Slope (1:X)" and "Max. Slope (1:X)" at the bottom of the window. Does this not defeat the purpose of setting up your pipe size library in the first place?
It does seem that the most efficient solution to my issue is to just use the check velocity box and set it to a minimum of 1m/s. Write off using the pipe size library entirely. My only annoyance is that the the minimum gradients appear to be slightly steeper using this method.
For example - a 225mm dia. pipe can be set at 1:170 manually to achieve a 1m/s full bore velocity. However if you use the "Check Velocity" option within the wizard and set the minimum to 1m/s, it will give you a minimum gradient of 1:160. Minor difference admittedly but over a distance of 80metres, that's 30mm you could save downstream.
Anyone have any insight?
Kind Regards,
Douglas
