The maximum length of a pipe which allows a required liquid flow rate for a maximum allowable pressure loss can be calculated as follows:



Figure 48 Find Length Calculation – Liquid


  1. Select the Find Length calculation.
  2. Select or define the Material and Internal Roughness of the pipe.  For more information about working with pipe materials, see: Pipe Material & Diameters
  3. Select or define the Internal Diameter of the pipe.  For more information about working with pipe diameters, see: Pipe Material & Diameters
  4. Set the Elevation Change of the pipe.
  5. Select the Fluid in the pipe.  For more information about working with fluid, see: Fluids Database
  6. Enter the Flow Rate of the fluid in the pipe.  For more information about setting a flow rate, see: Pipe Length Flow Rate Calculator / Helper
  7. Enter the Pressure Loss in the pipe. 
  8. Add Fittings to the pipe if required.  For more information about working with fittings, see: Fittings & Valves
  9. Tap Calculate Length 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 Length Results Panel displays the calculation input data and the results of the Find Length calculation.  For more information about the Results Panel, see: Results Panel


The Length units can be changed as required.  To change the length units for all subsequent calculations, the length 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, tap the Excel button or PDF button.  For more information about generating reports, see: Creating a Report of the Results


To change the number of decimals the results are displayed to, tap the Results Decimals button in the Results Menu Bar.  For more information, see: Results Menu Bar


Figure 49 Find Length Results – Liquid


To copy the calculation data to one or more other calculations, tap the Copy button and select the required calculation(s).

To close the Results Panel, tap the Close button in the Navigation Bar or the Close Results   button at the bottom.