HAZEN-WILLIAMS   CALCULATION
          UNITS:  
   
DARCY-WEISBACH METHOD (IP)  
f dimensionless friction factor         -  
V fluid velocity         ft/s  
L pipe length         ft  
g acceleration due to gravity   Given   32.2 ft/s2  
D pipe diameter         ft  
hf head loss   hf = (f V2 L) / (2 g D)     ft  
                 
                   
DARCY-WEISBACH METHOD (SI)  
                   
                   
HAZEN-WILLIAMS (IP)  
Q flow rate       gpm  
C C-Factor (coefficient of roughness)      
-  
- nominal pipe diameter      
in  
- pipe schedule      
-  
D internal pipe diameter       in  
L length of pipe       ft  
Pf pressure loss due to friction   Pf = L x (4.52 Q1.85) /
(C1.85 D4.87) 		  psi  
     
                   
HAZEN-WILLIAMS (SI)  
Q flow rate       L/min  
C C-Factor (coefficient of roughness)      
-  
- nominal pipe diameter      
mm  
- pipe schedule      
-  
D internal pipe diameter       mm  
L length of pipe       m  
Pf pressure loss due to friction   Pf = L x (6.05 x Q1.85 x 105) / (C1.85 D4.87)   bar