Vacuum Pumps - Exhaust Pipe Capacities
The diagrams below can be used to indicate vacuum pump exhaust pipe line capacity:
Air flow - scfm
Air flow - nl/s
Example - Vacuum Pump Exhaust Pipe
The exhaust air flow from a vacuum pump is 1200 cfm and the required length of the exhaust piping is 60 ft.
As we can see the range of the diagram above is limited but with half the flow - 600 cfm - the maximum length of a 6" pipe is approximately 120 ft. Or in other words - with two 6" pipes in parallel there will be enough capacity.
Alternatively - if we compare an 8" pipe with a 6" pipe - we see that the internal area of the 8" pipe is twice the area of the 6" pipe - and we can assume that a single 8" pipe provides enough capacity.
Related Topics
• Gases and Compressed Air
Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.
Related Documents
ANSI Schedule 40 Steel Pipes - Dimensions
Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.
ANSI Schedule 80 Steel Pipes - Dimensions
Internal and external diameters, areas, weights, volumes and number of threads for schedule 80 steel pipes.
Stainless Steel Pipes - Dimensions and Weights
Dimensions, wall thickness and weights of stainless steel pipes according to ASME B36.19 Stainless Steel Pipes.
Steel Pipes Schedule 40 - Pressure Loss
Water flow and pressure loss in schedule 40 steel pipes - Imperial and SI units - gallons per minute, liters per second and cubic meters per hour.
Vacuum
Vacuum is defined as air pressure below atmospheric pressure.
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.