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# Vacuum Pumps - Exhaust Pipe Capacities

The diagrams below can be used to indicate vacuum pump exhaust pipe line capacity:

### 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

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Air, LNG, LPG and other common gas properties, pipeline capacities, 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.

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