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Vacuum Pipes - Velocities
Vacuum pipes - air velocity diagrams
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Air velocity in vacuum pipes can be estimated with the diagrams below.
Standard and Actual Air Volume - cfm

The diagram is calculated for steel pipes schedule 40.
Example - Estimating 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:

Standard and Actual Air Volume - l/s

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Related Topics
- Gas and Compressed Air - Gas properties, capacities of pipelines, sizing of relief valves - air, LNG, LPG and more
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Related Documents
- Vacuum - Vacuum is defined as air pressure below atmospheric pressure
- Vacuum - Evacuation Time - Vacuum pumps - calculating flow rate and required evacuation time
- Vacuum - Expanded Air Ratio - Converting standard air volume flow to actual air volume flow
- Vacuum Pressure - Converting Units - Vacuum converting units - % vacuum - mm Mercury - psi - torr - micron - kPa
- Vacuum and Flow Measurement - Measuring volume flow in vacuum





