SylvanLMP
Harold, according the CDA water above 180 degrees should not have a velocity greater than 2 FPS as any higher can cause corrosion.
The problem with just figuring velocity and not the pH factor is why so many piping failures do occur.
Another point about “velocity” is the scouring action required on waste and soil lines as opposed to just storm piping.
Do you have any idea of the “velocity” of steam FLYING through a 6″ steam line with only 140 PSI behind it?
There are a whole big bunch of factors to consider BESIDES Hazen- Williams formula’s.
Material selection plays a very important part in the selection of design pressure and area Or Fixture units to be drained.
There is no one size fit all application even if you are using the same materials.
