Support Space Pvc Pipes

Overview

Engineering reference data for Support Space Pvc Pipes 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	—

Data Tables

Unit Conversions

The following conversion formulas relate the units used in the data tables:

$1 \, \text{ft} = 0.3048 \, \text{m}$

$T (^{\circ}C) = \frac{5}{9} \left( T (^{\circ}F) - 32 \right)$

Key Definitions

• NPS (Nominal Pipe Size): The standard North American designation for pipe size, which does not directly correspond to the physical dimensions. The data uses the common inch-based NPS designation.
• Maximum Support Spacing: The greatest recommended distance between supports to prevent excessive sagging or stress in the pipe, which is highly dependent on the operating temperature. The values decrease significantly as temperature increases, especially above 100°F (38°C).
• Pipe Schedule: A designation of pipe wall thickness. *Schedule 80 pipes have thicker walls than *Schedule 40 pipes of the same NPS, allowing them to handle higher pressures and, as shown in the tables, support slightly longer spans.

Interactive Charts

References

• Original Source