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# Oil Pipes - Head Loss

## Head or pressure loss due to friction in oil pipes - various viscosity and laminar flow.

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.

4 25 45 250 500     Viscosity (cSt)

Flow (l/s)

Pipe diameter (mm)

Specific Gravity of Oil

## Related Topics

• Combustion - Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.

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Temperature

oC
oF

Length

m
km
in
ft
yards
miles
naut miles

Area

m2
km2
in2
ft2
miles2
acres

Volume

m3
liters
in3
ft3
us gal

Weight

kgf
N
lbf

Velocity

m/s
km/h
ft/min
ft/s
mph
knots

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O

Flow

m3/s
m3/h
US gpm
cfm

3 10