ROEBLING
.
IO
FEL-3 Hydraulics & Line Sizing Engine — Liquid Systems
FEL-3 / AACE CLASS 3
Fluid Properties
Fluid description
Density (ρ)
kg/m³
Viscosity (μ)
cP
Volumetric flow rate
m³/h
L/s
US gpm
Pipe Specification
Pipe schedule
Sch 40
Sch 80
Sch 10
XS
Nominal diameter
½"
1"
1½"
2"
3"
4"
6"
8"
10"
12"
Pipe material / roughness
Carbon steel — commercial (0.046 mm)
Stainless steel — drawn (0.0015 mm)
Galvanized steel (0.15 mm)
Cast iron (0.26 mm)
PVC / HDPE — smooth (0.0 mm)
Pipe length
m
Equiv. length (fittings)
m
Static elevation change (+ = pump uphill)
m
Friction Correlation
Darcy-Weisbach
Hazen-Williams
Hazen-Williams C coefficient
—
Colebrook-White iterative solver. Valid all Re > 4000. Laminar: f = 64/Re. Suitable for all fluids.
Empirical — water only. C = 100 (old cast iron) to 150 (new plastic/PVC). Not valid below Re ≈ 4,000.
Pump & Motor Parameters
Pump efficiency (η)
%
Motor efficiency (ηₘ)
%
Head design margin
%
Velocity target
m/s
▶ RUN HYDRAULIC CALCULATION
Flow Regime
—
Re = —
Laminar
Transitional
Turbulent
Key Outputs — Pressure Drop & Line Sizing
Flow velocity
—
m/s
Friction factor (f)
—
Darcy
ΔP friction
—
kPa
ΔP static head
—
kPa
Total system ΔP
—
kPa
ΔP per 100 m
—
kPa/100m
Pump Sizing Summary
Required pump head
—
m H₂O equiv.
Head w/ design margin
—
m (design basis)
Hydraulic power
—
kW
Shaft power (BHP)
—
kW
Motor power (installed)
—
kW
Spec motor size
—
kW (std IEC frame)
Diameter Sensitivity — Optimal Line Size Selection
NPS
ID (mm)
Velocity (m/s)
Re
f Darcy
ΔP fric (kPa)
Pump head (m)
Motor (kW)
Status