What is the friction loss in 120m of 65mm hose flowing 1200 L/min?

What is the friction loss in 120m of 65mm hose flowing 1200 L/min?

• A. 548 kPa
• B. 500 kPa
• C. 600 kPa
• D. 700 kPa

Answer: (A)

Friction loss in a hose comes from the resistance to flow inside the hose, which depends on the hose diameter, the flow rate, and the length of hose. For a 65 mm hose at about 1200 L/min (roughly 320 GPM), standard friction-loss tables show about 20 psi of loss for every 100 feet of hose. The run is 120 meters, which is about 394 feet, so the loss is 3.94 × 20 psi ≈ 78–79 psi. Converting to kilopascals (1 psi ≈ 6.895 kPa) gives roughly 546 kPa, which rounds to about 548 kPa. So the friction loss for 120 m of 65 mm hose at 1200 L/min is around 548 kPa.

Friction loss in a hose comes from the resistance to flow inside the hose, which depends on the hose diameter, the flow rate, and the length of hose. For a 65 mm hose at about 1200 L/min (roughly 320 GPM), standard friction-loss tables show about 20 psi of loss for every 100 feet of hose. The run is 120 meters, which is about 394 feet, so the loss is 3.94 × 20 psi ≈ 78–79 psi. Converting to kilopascals (1 psi ≈ 6.895 kPa) gives roughly 546 kPa, which rounds to about 548 kPa. So the friction loss for 120 m of 65 mm hose at 1200 L/min is around 548 kPa.