Fire Protection System Steel Pipe Energy Loss Calculation

How can we calculate the energy loss in a steel pipe carrying water in a fire protection system?

Given data: A fire protection system includes 1200 ft of steel pipe with inside diameter of 10.02-In. How do we determine the energy loss in the pipe when it carries 1700 gal/min of water?

Calculation of Energy Loss in Steel Pipe

The energy loss in the pipe when it carries 1700 gal/min of water is approximately 0.0000017 ft.

To calculate the energy loss in the steel pipe, we use the Hazen-Williams formula. This formula is essential in determining the head loss in pipes based on various factors such as length, flow rate, and diameter.

The Hazen-Williams formula is expressed as:
hL = 10.67 * (C * L * Q^1.852) / (D^4.87)

Where:
hL is the head loss
C is the Hazen-Williams coefficient
L is the length of the pipe
Q is the flow rate
D is the diameter of the pipe

In this calculation:
Length, L = 1200 ft = 14400 inches
Diameter, D = 10.02 inches
Flow rate, Q = 1700 gal/min = 3.79 ft^3/s

Assuming a Hazen-Williams coefficient of 120 for steel pipes, we substitute these values into the formula and calculate the energy loss resulting in approximately 0.0000017 ft. This calculation allows us to understand the efficiency and performance of the fire protection system's steel pipe when carrying water at a specific flow rate.