Heltzel

One of the oldest equations is which is still being used for Reynolds values in the range of Re = 4,000 to 57,600. This equation is limited to laminar flow only. Other limitations include velocity changes and larger diameters.

 

Flow Rate

 

Upstream Pressure

 

Downstream Pressure

 

Internal Diameter

𝐾_𝑉 − Kinematic Viscosity[ft²/sec]

𝐻₁ − Upstream Elevation[ft]

𝐻₂ − Downstream Elevation[ft]

𝐵 − Flow Rate[ft/sec]

𝐷−Pipe Internal Diameter[in]

𝐿 − Pipeline Length[mi]

𝐺 − Liquid Specific Gravity

∆𝑃 − Pressure Drop[psi]

𝑃₁ − Upstream Pressure[psi]

𝑃₂ − Downstream Pressure[psi]

 

Input Parameters

1. To create a new case, click the “Add Case” button
2. Select the Unknown and desired Flow Equation.
3. Enter Case Name, Location, Date and any necessary notes.
4. Fill out all required fields.
5. Make sure the values you are inputting are in the correct units.
6. Click the CALCULATE button.

• Flowing Temperature base(°F)
• Liquid Specific Gravity
• Upstream Pressure(psig)
• Downstream Pressure
• Kinematic Viscosity
• Internal Pipe Diameter(in)
• Length of Pipeline(mi)
• Upstream Elevation(ft)
• Downstream Elevation(ft)

 

Outputs/Reports

1. View the results.
2. If an input parameter needs to be edited be sure to hit the CALCULATE button after the change.
3. To SAVE, fill out all required case details then click the SAVE button.
4. To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
5. To generate a REPORT, click the REPORT button.
6. The user may export the Case/Report by clicking the Export to Excel/PowerPoint icon.
7. To delete a case, click the DELETE icon near the top of the widget.

• Flow Rate(ft/sec.)
• Upstream Pressure(psi)
• Downstream Pressure(psi)
• Internal Pipe Diameter(in)
• Pressure Drop [psi/mi]

Flow Rate

 

Upstream Pressure

 

Downstream Pressure

 

Internal Pipe Diameter 

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