Friction Loss Viscous Liquids

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Friction loss in steel pipes 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 some 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 Flow and Pressure Drop - 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. Involves various properties of the fluid, such as velocity, pressure, density and temperature, as functions of space and time.

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