Quote Originally Posted by Esam View Post
As a rule of thumb the following velocities can be used in design of piping and pumping systems for viscous liquids:
Pipe Dimension Viscous Liquids
inches mm m/s ft/s
1 25 1 3.5
2 50 1.1 3.6
3 75 1.1 3.7
4 100 1.15 3.8
6 150 1.2 3.9
8 200 1.2 4
10 250 1.3 4.5
12 300 1.4 4.5
Viscous liquids means to what "Reynolds number range" it applies.

Cheers,

duazo2009