Moody

With Moody diagram you can calculate the pressure drop in any flow system.
Given the flow parameter (Re) and the roughness parameter (k/d), you can get the friction factor (f).

Using the (f) factor, you can work out the pressure drop from: dP = ½ ρ f L V2 / d. This program works for all fluids like water, air, refrigerant, glycol, etc.