Hydraulic Grade Line HGL Modules

Calculate gas and liquid pipeline hydraulic pressure or hydraulic grade line (HGL) from data points using the Bernoulli equation.

The hydraulic or piezometric pressure is calculated by

`Ph = Ps + Pz `

where :

Ps = static pressure
Pz = potential or pressure
Ph = hydraulic or piezometric pressure (HGL)

For constant diameter pipelines, the friction pressure loss can be calculated from the difference in hydraulic pressure (changes in dynamic pressure are ignored). For gas pipelines, the changes in dynamic pressure are usually small compared to the other terms.

Note : The pressure terms are calculated at the selected data point. The data point option is set to pipe inlet when the page loads. Click calculate to update the data point options to include all of the data points before you select the data point. Click calculate each time you change the position data (X) values, and before you select the data point. Data points can be entered as comma separated values (Xi, Zi, Pi) with each set on a new line, or copy and paste from a spreadsheet.

Change Module :

• Bernoulli's Equation Calculation Module
• Bernoulli's Equation Energy Grade Line Calculation Module
• Bernoulli's Equation Flow Meter Calculation Module
• Bernoulli's Equation Fluid Flowrate And Velocity Calculation Module
• Bernoulli's Equation Pitot Tube Calculation Module
• Bernoulli's Equation Prandtl Tube Calculation Module
• Bernoulli's Equation Stationary Pressure From Elevation Calculation Module
• All

Related Modules :

• Fluid Density And Volume Calculation Module
• Gas Compressibility Factor Calculation Module
• Line Pipe Cross Section Calculation Module
• More Bernoulli's Formula Modules