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Peh Pvc Pipes Pressure Drop

Reference data and engineering information about peh pvc pipes pressure drop for fluid mechanics applications.

pehpvcpipespressureCalculator

Overview

Engineering reference data for Peh Pvc Pipes Pressure Drop in fluid mechanics.

Key Formulas

Reynolds Number

Re=ρvDμRe = \frac{\rho v D}{\mu}

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

P+12ρv2+ρgh=constP + \frac{1}{2}\rho v^2 + \rho g h = \text{const}

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

A1v1=A2v2A_1 v_1 = A_2 v_2

Conservation of mass for incompressible flow.

Darcy-Weisbach

ΔP=fLDρv22\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}

Pressure drop due to friction in a pipe.

Variables

SymbolDescriptionUnit
ReReReynolds number—
ρ\rhoFluid densitykg/m³
vvFlow velocitym/s
DDCharacteristic dimensionm
μ\muDynamic viscosityPa·s
PPPressurePa
ffDarcy friction factor—

Unit Conversions

QuantityConversion
Pressure1 Pa=10−6 N/mm2=10−5 bar=0.1020 kp/m2=1.020×10−4 m H2O at 4∘C/39∘F=9.869×10−6 atm=0.004 in H2O=1.450×10−4 psi (lbf/in2)=0.02089 lbf/ft2 (psf)1 \, \text{Pa} = 10^{-6} \, \text{N/mm}^2 = 10^{-5} \, \text{bar} = 0.1020 \, \text{kp/m}^2 = 1.020 \times 10^{-4} \, \text{m H}_2\text{O at } 4^\circ\text{C}/39^\circ\text{F} = 9.869 \times 10^{-6} \, \text{atm} = 0.004 \, \text{in H}_2\text{O} = 1.450 \times 10^{-4} \, \text{psi (lbf/in}^2) = 0.02089 \, \text{lbf/ft}^2 \, (\text{psf})
Flow Rate1 m3/s=3600 m3/h=1000 l/s=35.32 ft3/s=2118.9 ft3/min=13198 gal(UK)/min=15850 gal(US liq)/min=791891 gal(UK)/h=908.08 qt(US dry)/s1 \, \text{m}^3/\text{s} = 3600 \, \text{m}^3/\text{h} = 1000 \, \text{l/s} = 35.32 \, \text{ft}^3/\text{s} = 2118.9 \, \text{ft}^3/\text{min} = 13198 \, \text{gal(UK)/min} = 15850 \, \text{gal(US liq)/min} = 791891 \, \text{gal(UK)/h} = 908.08 \, \text{qt(US dry)/s}
Length1 m=3.28083 ft=39.3701 in1 \, \text{m} = 3.28083 \, \text{ft} = 39.3701 \, \text{in}

Example Calculation

For a PEH pipe with an inside diameter of 250 mm (0.25 m) and a water flow of 50 l/s (0.005 m³/s), the pressure drop is approximately 0.35 Pa/m (0.035 bar/100 m). The flow velocity is approximately 1 m/s.

References

Source: engineeringtoolbox.com