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# Compressed Air - Pressure Drop Diagrams, Metric Units

## Pressure loss in compressed air pipe lines.

Compressed air pipeline pressure drop in kg/m2 per 100 m pipe can be estimated for typical entering pressures in the diagrams below. The diagrams are calculated for schedule 40 pipes.

Other dimensions or pressures can be calculated with the

### Compressed Air Entering Pressure 5 kg/cm2

• 1 kg/cm2 = 0.98 bar = 735 mmHg = 10000 mmH2O = 14.2 psi
• 1 m3/min = 0.017 m3/s = 60 m3/h = 1000 liter/min = 35.3 cfm
• 1 m (meter) = 3.2808 ft = 39.37 in

### Compressed air pressure drop for pipes other than Schedule 40

Compressed air pressure drop in pipes other than schedule 40 can be calculated as

dp = dp40 (d40 / d)5                                                      (1)

where

dp = actual pressure drop (bar per 100 m pipe)

dp40 = pressure drop in schedule 40 pipe from the table or diagram above (bar per 100 m pipe)

d40 = inside diameter schedule 40 pipe (inches)

d = actual inside diameter (inches)

## Related Topics

• ### Gases and Compressed Air

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

## Related Documents

• ### Air - Composition and Molecular Weight

Dry air is a mechanical mixture of nitrogen, oxygen, argon and several other gases in minor amounts.
• ### Air - Density vs. Pressure and Temperatures

Air density at pressure ranging 1 to 10 000 bara (14.5 - 145000 psi) and constant selected temperatures.
• ### Air - Density, Specific Weight and Thermal Expansion Coefficient vs. Temperature and Pressure

Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 °C (-140 to 2900 °F) at atmospheric and higher pressure - Imperial and SI Units.
• ### Air - Diffusion Coefficients of Gases in Excess of Air

Diffusion coefficients (D12) for gases in large excess of air at temperatures ranging 0 - 400 °C.
• ### Air - Dynamic and Kinematic Viscosity

Online calculator, figures and tables with dynamic (absolute) and kinematic viscosity for air at temperatures ranging -100 to 1600°C (-150 to 2900°F) and at pressures ranging 1 to 10 000 bara (14.5 - 145000 psia) - SI and Imperial Units.
• ### Air - Prandtl Number

Prandtl number for air vs. temperature and pressure.
• ### Air - Properties at Gas-Liquid Equilibrium Conditions

Properties of air change along the boiling and condensation curves (temperature and pressure between triple point and critical point conditions). An air phase diagram included.
• ### Air - Thermal Conductivity vs. Temperature and Pressure

Online calculator with figures and tables showing air thermal conductivity vs. temperature and pressure. SI and imperial units.
• ### Air - Thermal Diffusivity vs. Temperature and Pressure

Figures and tables withdry air thermal diffusivity vs. temperarure and pressure. SI and Imperial units.
• ### ANSI Schedule 40 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.
• ### ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions - Metric Units

Pipe sizes, inside and outside diameters, wall thickness, schedules, weight and weight of pipe filled with water - Metric Units.
• ### Compressed Air - Air Flow and Recommended Pipe Size

Pipe line sizing compressed air
• ### Compressed Air - Friction Loss in Hoses

Friction loss in air hoses vs. operating pressure.
• ### Compressed Air - Laboratory Consumption

Compressed air supply to laboratories.
• ### Compressed Air - Pipe Line Pressure Loss - Online Calculator with Metric and Imperial Units

Calculate pressure drop in compressed air pipe lines - metric and imperial units.
• ### Compressed Air - Size of Pipe vs. Capacity

Air pipe lines capacities at pressure 100 psi (6.9 bar).
• ### Compressed Air Pipe Lines - Pressure Loss vs. Capacity and Operating Pressure

Pressure drop in compressed air pipe lines.
• ### Compressed Air Piping - Pressure Loss Diagrams, Imperial Units

Pressure drop in compressed air pipelines with applied pressure 50, 100 and 150 psi.
• ### Compressed Air vs. Free Air - Compression Ratio

The ratio of compressed air pressure to free air pressure.

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## Citation

• The Engineering ToolBox (2008). Compressed Air - Pressure Drop Diagrams, Metric Units. [online] Available at: https://www.engineeringtoolbox.com/compressed-air-pressure-drop-si-units-d_1177.html [Accessed Day Month Year].

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4.19.9

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