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Viscous Liquids - Friction Loss vs. Viscosity and Flow

Friction loss in steel pipes for fluids with viscosities ranging 32 - 80000 SSU.

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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.

Viscosity and Specific Gravity of common Liquids

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

Pipe Size 1/2"

Pipe Size 3/4"

Pipe Size 1"

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

Pipe Size 1 1/4"

Pipe Size 1 1/2"

Pipe Size 2"

Pipe Size 2 1/2"

Pipe Size 3"

Pipe Size 4"

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

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Related Topics

Fluid Mechanics - The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
Fluid Flow and Pressure Loss - Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more.

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