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Vacuum Pipes - Flow Velocities

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Air velocities in vacuum pipes can be estimated with the diagrams below.

Standard and Actual Air Volume - cfm

Download and print Vacuum Pipe Line - Velocity vs. Fow Chart

The diagram is calculated for steel pipes schedule 40.

Example - Estimating the Vacuum Air Flow Velocity

Velocity in a NPS 3" steel pipe with standard air volume flow 100 scfm at 30% vacuum can be estimated to approximately 3000 fpm as indicated in the diagram below:

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Standard and Actual Air Volume - l/s

Download and print Vacuum Pipe Line - Velocity vs. Fow Chart

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Related Topics

• Gases and Compressed Air

Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.

Related Documents

Vacuum

Vacuum is defined as air pressure below atmospheric pressure.

Vacuum - Air Expansion Ratio

Convert vacuum air volume to standard air volume

Vacuum - Evacuation Time

Vacuum pumps - calculate flow rate and required evacuation time.

Vacuum - Flow Measurement

Measure air volume flow in vacuum.

Vacuum - Pressure Units Converter

Converting between vacuum units like % vacuum - mm Mercury - psi - torr - micron - kPa.

Vacuum Pipes - Pressure Loss vs. Air Flow

Calculate pressure drops in vacuum pipe lines.

Water - Boiling Points at Vacuum Pressure

Online calculator, figures and tables giving the boiling temperatures of water in varying vacuum, SI and Imperial units.

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