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Calculate Friction Loss in Pipe Contraction Under Partial Flow:
 
Calculation:
Designer/Checker:
   
Input:  
   
 
Upstream Velocity (V1 - fps or mps)
Downstream Velocity (V2 - fps or mps)
Note: For Contraction, V2 > V1  
   
   
Output:  
 
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Head Loss (H) =
 
 



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