Steel Pipe Flanges

Overview

Engineering reference data for Steel Pipe Flanges 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	—

Flange Dimensional Data

The AWWA C207-94 standard defines slip-on flange dimensions for various pressure classes. The following table consolidates the dimensional data for Classes B, D, E, and F.

Pressure Ratings

The AWWA C207-94 standard defines the following nominal pressure ratings for each flange class:

• Class B: 86 psi
• Class D: 175 - 150 psi
• Class E: 275 psi
• Class F: (Higher pressure, specific rating not listed in source text)

Interactive Charts

References

• Original Source