Oil Pipes - Head Loss
Head or pressure loss in oil pipes with laminar flow can be calculated with the table below:
| Viscosity (cSt) | 4 | 25 | 45 | 250 | 500 |
| Head loss - h - | 1.7 104 f / d4 | 11 104 f / d4 | 20 104 f / d4 | 110 104 f / d4 | 220 104 f / d4 |
where
h = head loss (moil / mpipe ) - meter oil per metre oil pipe - length of pipe includes allowances for bends, valves and fittings
f = flow of oil (liter/s)
d = internal diameter of pipe (mm)
The formula above is for laminar flow where Reynolds Number (Re) is less than 2300.
The Reynolds number can be calculated from the table below:
| Viscosity (cSt) | 4 | 25 | 45 | 250 | 500 |
| Reynolds number | 32 104 f / d | 4.5 104 f / d | 2.8 104 f / d | 0.45 104 f / d | 0.25 104 f / d |
Oil Pipe Head Loss Calculator
The calculator is based on the equations above.
Viscosity (cSt)
Related Topics
• Combustion
Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.
Related Documents
Heat Loss from Oil Filled Tanks and Pipe Lines
Heat loss from insulated and non insulated sheltered and exposed oil tanks and pipes.
Oil Pipes - Heat Loss
Heat loss in W/mK and Btu/hr ft degF from oil tubes ranging temperatures 10 - 38 degC (50 - 100 degF).
Oil Pipes - Pressure Loss vs. Oil Flow
Pressure drop in oil pipes - viscosities ranging 100 - 600 Saybolt Universal Seconds.
Oil Pipes - Recommended Flow Velocities
Oil pipes flow velocities should be kept within certain limits.