Enter the flow rate, Hazen-Williams coefficient, pipe diameter, and pipe length into the calculator to determine the head loss due to friction in the pipe.
Hazen Williams Equation
The Hazen Williams equation is used to calculate the head loss due to friction in a pipe. The formula is as follows:
HL = (10.67 * Q^{1.852} * L) / (C^{1.852} * D^{4.8655})Variables:
- HL is the head loss due to friction (feet)
- Q is the flow rate (gallons per minute)
- C is the Hazen-Williams coefficient (dimensionless)
- D is the pipe diameter (inches)
- L is the pipe length (feet)
To calculate the head loss, input the flow rate, Hazen-Williams coefficient, pipe diameter, and pipe length into the formula.
What is Head Loss?
Head loss refers to the loss of pressure due to friction as water flows through a pipe. It is an important factor in hydraulic engineering and is used to design pipe systems to ensure efficient water delivery with minimal pressure loss.
How to Calculate Head Loss?
The following steps outline how to calculate the head loss using the Hazen Williams equation.
- First, determine the flow rate (Q) in gallons per minute.
- Next, determine the Hazen-Williams coefficient (C), which is dimensionless and varies based on the pipe material.
- Then, measure the pipe diameter (D) in inches.
- Measure the length of the pipe (L) in feet.
- Use the Hazen Williams equation to calculate the head loss (HL).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Flow rate (Q) = 500 gallons per minute
Hazen-Williams coefficient (C) = 130
Pipe diameter (D) = 12 inches
Pipe length (L) = 1000 feet
