ISO 11922 Thermoplastic Pipes Dimensions

Overview

Engineering reference data for ISO 11922 Thermoplastic Pipes Dimensions in piping systems.

Key Formulas

Continuity

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

Pressure Drop

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

Darcy-Weisbach equation.

Pipe Area

$A = \frac{\pi D^2}{4}$

Cross-sectional area of a pipe.

Variables

Symbol	Description	Unit
$D$	Pipe diameter	m
$v$	Flow velocity	m/s
$\Delta P$	Pressure drop	Pa
$f$	Friction factor	—

Outside Diameter Tolerances

The standard defines five tolerance grades for the outside diameter. Grades A, B, and C are calculated from the nominal diameter (dn).

Nominal Outside Diameter Sizes (Metric Series)

The standard specifies the following nominal outside diameters (d_n) for thermoplastic pipes in the metric series.

Mean External Diameter Sizes (Inch-based Series)

For the inch-based series, the standard provides the mean external diameter corresponding to the nominal pipe size.

Interactive Charts

References

• Original Source