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Viscous Liquids - Friction Loss vs. Viscosity and Flow

Friction loss in steel pipes for fluides with various viscosities are indicated in the diagrams below.

Note that kinematic viscosity SSU 32 (1 centiStokes) equals viscosity of water at normal room temperature. Kinematic viscosity SSU 2000 (440 centiStokes) equals SAE 140 Gear Oil.

• 1 psi/ft = 27.7 inH2O/ft = 22.6 kPa/m
• 1 gpm = 0.23 m3/h

Pipe Size 1"

• 1 psi/ft = 27.7 inH2O/ft = 22.6 kPa/m
• 1 gpm = 0.23 m3/h

Pipe Size 4"

• 1 psi/ft = 27.7 inH2O/ft = 22.6 kPa/m
• 1 gpm = 0.23 m3/h

Related Topics

• Fluid Flow and Pressure Loss

Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more.

• Fluid Mechanics

The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.

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