ANSI Pipes Flanges

Overview

Engineering reference data for ANSI Pipes 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	—

Data Table

ASME/ANSI B16.5 Class 900 Flange Dimensions

Technical Notes

• The table covers flange dimensions for Class 900 pressure rating per ASME/ANSI B16.5 standard.
• Recommended Bolt Size: Bolts are typically specified as 1/8 inch smaller than the nominal bolt hole diameters listed.
• Unit Conversion: $1 \text{ inch} = 25.4 \text{ mm}$.
• Standard Scope: ANSI B16.5 specifies dimensions for pipe sizes from 1/2 inch through 24 inches. Sizes 26 inches and larger listed are common extensions but may be covered by other standards (e.g., ASME B16.47).

References

• Original Source