Pressure Drop Calculation - Gas
The pressure drop for a gas in a pipe can be calculated as follows:
- Select the Find Pressure calculation.
Figure 27 Find Pressure Calculation – Gas
- Select or define the Material and Internal Roughness of the pipe. For more information about working with pipe materials, see: Pipe Material & Diameters
- Select or define the Internal Diameter of the pipe. For more information about working with pipe diameters, see: Pipe Material & Diameters
- Set the Length and Elevation Change of the pipe.
- Add Fittings to the pipe if required. For more information about working with fittings, see: Fittings & Valves
- Select the Fluid in the pipe. For more information about working with fluids, see: Fluids Database
- Enter the Pressure of the fluid at the start of the pipe.
- Enter the Flow Rate of the fluid in the pipe. For more information about setting a flow rate based on a velocity, see: Pressure Drop Flow Rate Calculator / Helper
- Click Calculate Pressure Drop and the Results Panel will slide up.
The internal diameter will be reset to 1.049” (26.64 mm) if running the trial version of Pipe Flow Wizard.
The Find Pressure Results Panel displays the calculation input data and the results of the Pressure Drop calculation. For more information about the Results Panel, see: Results Panel
The pressure loss unit can be changed as required. To change the pressure loss unit for all subsequent calculations, the pressure loss unit can be specified in Settings > Units. For more information about setting units, see: Units
To generate and view an Excel or PDF Report of the results, click the Excel 
button or PDF 
button. For more information about generating reports, see: Creating a Report of the Results
To copy the calculation data to one or more other calculations, click the Copy 
button and select the required calculation(s).
To close the Results Panel, click the Close 
button in the corner or the Close Results 
button at the bottom.
