Pe Pipe Pressure Loss

Reference data and engineering information about pe pipe pressure loss for fluid mechanics applications.

pipepressureloss

Overview

Engineering reference data for Pe Pipe Pressure Loss in fluid mechanics.

Key Formulas

Reynolds Number

$Re = \frac{\rho v D}{\mu}$

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

$P + \frac{1}{2}\rho v^2 + \rho g h = \text{const}$

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

$A_1 v_1 = A_2 v_2$

Conservation of mass for incompressible flow.

Darcy-Weisbach

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

Pressure drop due to friction in a pipe.

Variables

Symbol	Description	Unit
$Re$	Reynolds number	—
$\rho$	Fluid density	kg/m³
$v$	Flow velocity	m/s
$D$	Characteristic dimension	m
$\mu$	Dynamic viscosity	Pa·s
$P$	Pressure	Pa
$f$	Darcy friction factor	—

Fluid Properties

The pressure loss calculations use the following properties for water at 20°C flowing through PE pipes:

Property	Metric	Imperial
Fluid	Water	Water
Pipe	Polyethylene (PE) SDR Pressure Rated Tube	—
Temperature	20.0 °C	68.0 °F
Density	998.3 kg/m³	62.0 lb/ft³
Kinematic Viscosity	1.004 × 10⁻⁶ m²/s	1.08 × 10⁻⁵ ft²/s
Pipe Roughness Coefficient	3.0 × 10⁻⁶ m	—

Pressure Loss Data Tables

1/2" PE Pipe (Inside Diameter: 0.0158 m / 0.62 in)

10 rows

Pressure loss vs. flow rate for 1/2 in. PE pipe (ID = 0.0158 m)
Flow(m³/s)	Flow(L/s)	Flow(US gpm)	Velocity(m/s)	Velocity(ft/s)	Pressure Drop(Pa/100m)	Pressure Drop(mmH₂O/100m)	Pressure Drop(psi/100ft)	Pressure Drop(ftH₂O/100ft)
3.0E-5	0.03	0.48	0.153	0.5	3550	362	0.157	0.36
4.0E-5	0.04	0.63	0.20	0.67	5785	590	0.26	0.59
5.0E-5	0.05	0.79	0.26	0.84	8629	880	0.38	0.88
6.0E-5	0.06	0.95	0.31	1.0	11834	1207	0.52	1.21
7.0E-5	0.07	1.11	0.36	1.17	15302	1560	0.68	1.56
8.0E-5	0.08	1.27	0.41	1.34	19460	1984	0.86	1.99
9.0E-5	0.09	1.43	0.46	1.51	23298	2376	1.03	2.40
1.0E-4	0.10	1.59	0.51	1.67	28763	2933	1.27	2.90
2.0E-4	0.20	3.20	1.02	3.3	95329	9721	4.20	9.70
3.0E-4	0.30	4.80	1.53	5.0	199697	20363	8.80	20.0

Source: engineeringtoolbox.com

3/4 in. PE Pipe (Inside Diameter: 0.021 m / 0.82 in)

10 rows

Pressure loss vs. flow rate for 3/4 in. PE pipe (ID = 0.021 m)
Flow(m³/s)	Flow(L/s)	Flow(US gpm)	Velocity(m/s)	Velocity(ft/s)	Pressure Drop(Pa/100m)	Pressure Drop(mmH₂O/100m)	Pressure Drop(psi/100ft)	Pressure Drop(ftH₂O/100ft)
4.0E-5	0.04	0.63	0.115	0.38	1522	155	0.067	0.155
5.0E-5	0.05	0.79	0.144	0.47	2229	227	0.099	0.23
6.0E-5	0.06	0.95	0.173	0.57	3067	313	0.136	0.31
7.0E-5	0.07	1.11	0.200	0.66	3980	406	0.176	0.41
8.0E-5	0.08	1.27	0.230	0.76	4945	504	0.220	0.50
1.0E-4	0.10	1.59	0.290	0.95	7331	748	0.320	0.75
2.0E-4	0.20	3.20	0.580	1.89	24568	2505	1.090	2.50
3.0E-4	0.30	4.80	0.870	2.80	49929	5091	2.200	5.10
4.0E-4	0.40	6.30	1.150	3.80	85593	8728	3.800	8.70
6.0E-4	0.60	9.50	1.730	5.70	171186	17456	7.600	17.5

Source: engineeringtoolbox.com

1" PE Pipe (Inside Diameter: 0.027 m / 1.05 in)

Interactive Charts

Bending PE Pipes

Hoses - Pressure Loss vs. Water Flow

References

Original Source

Source: engineeringtoolbox.com