The Compressible Flow Pressure Loss Calculator is used determine the pressure loss for compressible, flowing gases. Calculations are based on gas properties such as molecular weight and specific heat ratio, and physical specifications for pipes, tubes, valves, and fittings. This calculator is designed for use with clean commercial steel pipes, galvanized iron pipes, drawn tubing, cast iron pipes, PVC pipes, fiberglass pipes, and asphalted cast iron pipes.
Engineering Calculator Disclaimer
Nominal Pipe Size:
Pipe Schedule:
Piping Material:
Flow Rate:
Flow Rate Units:
Viscosity: (cP) (Typical Values)
Typical Viscosity Values
Air @ 70F.0180 cP
Ammonia @ 70F.0100 cP
Carbon Dioxide @ 70F.0143 cP
Temperature: (F)
Gas Molecular Weight: (lb/lbmol) (Typical Values)
Typical Molecular Weight Values
ACETYLENE26 lb/lbmol
AIR29 lb/lbmol
AMMONIA17 lb/lbmol
ARGON39.9 lb/lbmol
CHLORINE70.9 lb/lbmol
HYDROGEN2 lb/lbmol
NATURAL GAS19.5 lb/lbmol
NITROGEN28 lb/lbmol
OXYGEN32 lb/lbmol
PROPANE44.1 lb/lbmol
STEAM18 lb/lbmol
Specific Heat Ratio: (Typical Values)
Typical Specific Heat Ratio Values
Carbon Dioxide1.30
Natural Gas1.27
Compressibility Factor:
Inlet Pressure:
Piping Length (ft):
Flanged or Butt-Welded Elbows
Threaded Elbows
Entrance and Exit
Increasers and Reducers

Related GlobalSpec Product Areas

Gas Sensors (571 companies)

Gas sensors interact with a gas to initiate the measurement of its concentration. The sensor then provides output to an instrument to display the measurements. Search By Specification | Learn More about Gas Sensors

Gas Instruments (947 companies)

Gas instruments detect, monitor or analyze gases present in an environment. Search By Specification | Learn More about Gas Instruments

Industrial Gases (336 companies)

Industrial gases are pure elements, molecular compounds or mixtures that are gaseous or vaporous at room temperature and pressure. Search By Specification | Learn More about Industrial Gases

Welding gases and thermal process gases are specialized gases for welding, cutting or other thermal processing applications. Search By Specification | Learn More about Welding Gases and Thermal Process Gases

Electronic and semiconductor gases are specialized for microelectronic manufacturing or semiconductor processing applications such as thin film deposition (CVD, PVD), etching, RTP, packaging or soldering. Search By Specification | Learn More about Electronic and Semiconductor Gases

Laboratory and calibration gases are specialized for use as laboratory standards, as well as for detection, sample preparation, environmental monitoring and analysis applications. Search By Specification | Learn More about Laboratory and Calibration Gases

Pharmaceutical and medical gases are pure fluids which are used to synthesize, sterilize, or insulate processes or products which contribute to human health. They are also administered to patients as therapy. Search By Specification | Learn More about Pharmaceutical and Medical Gases

Food and Beverage Gases (26 companies)

Food and beverage gases meet stringent quality controls for their implementation as food ingredients or as a food contact substance. Search By Specification | Learn More about Food and Beverage Gases

Chemical process and petrochemical gases are materials used in the production of compounds or products. They are used in processes such as inerting, blanketing, purging, sparging, and stripping. These gases are used in many applications including treatment and sterilization, medicine, energy solutions, and manufacturing.

Search By Specification | Learn More about Chemical Process and Petrochemical Gases

Engineering Calculator Disclaimer

GlobalSpec, Inc. engineering calculators are free for individuals to use via this site under the terms and conditions set out under the Terms of Use of this web site and supplemented by this Engineering Calculator Disclaimer. These calculators are intended solely for general information and educational purposes, and are provided to help decrease the learning curve for those inexperienced in the engineering field and to give more experienced users additional reference tools.

The engineering calculators provided are not intended in any way as engineering advice or services, or as a solicitation for any engineering product or service. Any results from use of these calculators may not be applicable or accurate with regard to the individual circumstances, cannot be relied upon for anything, including, without limitation, engineering designs or decisions, and should not be the basis for any action or inaction on your part. Read Entire Disclaimer

Back to Top