Process Inputs
Recommended Sizing
| Pressure Drop (ΔP) | — |
| Head Loss (hf) | — |
| Flow Regime | — |
| Required Min Dia. | — |
| Wall Thickness | — |
Liquid Flow Inputs
Method Comparison
| Method | ΔP (kPa) | hf (m) | v (m/s) | S (m/m) |
|---|---|---|---|---|
| Darcy-Weisbach | — | — | — | — |
| Hazen-Williams | — | — | — | — |
| Manning | — | — | — | — |
| Reynolds Number | — |
| Friction Factor (Colebrook) | — |
| Flow Regime | — |
Gas Pipeline Inputs
Pipeline Capacity
Compressible Inputs
Compressible Flow Results
| Inlet Velocity v₁ | — |
| Gas Density ρ₁ | — |
| Pressure Ratio P₂/P₁ | — |
| Flow Regime | — |
Two-Phase Inputs
Two-Phase Results
| ΔP Total | — |
| Froude (mixture) | — |
| vSL | — |
| vSG | — |
Fittings & Valves
Fittings Inventory
| Fitting | K-value | Qty |
|---|
Fittings Loss
Pump Inputs
Pump Performance
| Specific Speed Ns (SI metric) | — |
| Specific Speed Ns (US units) | — |
| Impeller Type | — |
| Std. Motor Size (IEC) | — |
Slurry Inputs
Slurry Results
| ΔP Total | — |
| Transport Regime | — |
| Recommended v | — |
| Velocity Margin | — |
API RP 14E Erosion
Erosion Assessment
Moody Operating Point
| f (Colebrook) | — |
| f (Swamee-Jain) | — |
| Regime | — |
Interactive Moody Diagram
Turbulent curves for ε/D ∈ {0, 5e-6, 5e-5, 1e-4, 5e-4, 1e-3, 2e-3, 5e-3, 1e-2, 2e-2, 5e-2}.
ASME B36.10M / B36.19M Pipe Database
| NPS | DN | OD (mm) | Sch | Wall (mm) | ID (mm) | A (cm²) | kg/m | v (m/s) |
|---|
FAQ
What is a fluid flow calculator?
A fluid flow calculator determines flow velocity, Reynolds number, pressure drop, and hydraulic performance in pipes and process systems.
What is pipe sizing?
Pipe sizing is the process of selecting the correct pipe diameter to safely transport fluids while maintaining acceptable velocity and pressure loss.
What equation is used for pressure drop calculations?
HydraFlow Pro Ultimate™ supports Darcy-Weisbach, Hazen-Williams, Manning, and several industry-standard pressure loss equations.
Can this calculator size natural gas pipelines?
Yes. The software supports Weymouth, Panhandle A, Panhandle B, and AGA gas flow calculations for natural gas pipeline design.
Does the calculator support two-phase flow?
Yes. HydraFlow Pro Ultimate™ includes Beggs & Brill, Friedel, and Lockhart-Martinelli methods for multiphase flow analysis.
Can I calculate pump head requirements?
Yes. The hydraulic analysis module calculates Total Dynamic Head (TDH), pump power, hydraulic power, and efficiency-related parameters.
