Steel Flanges Pressure Rating

Overview

Engineering reference data for Steel Flanges Pressure Rating in material science and properties.

Key Formulas

Stress

$\sigma = \frac{F}{A}$

Force per unit area.

Strain

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

Hooke's Law

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

Thermal Expansion

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Variables

Symbol	Description	Unit
$\sigma$	Stress	Pa
$\varepsilon$	Strain	—
$E$	Young's modulus	Pa
$\alpha$	Thermal expansion coefficient	1/°C
$\Delta T$	Temperature change	°C

Pressure Rating Data

Additional Formulas

The following formulas are essential for pressure rating calculations and unit conversions.

Pressure Unit Conversions: $1 \text{ psi} = 144 \text{ psf} = 6,894.8 \text{ Pa} = 6.895 \times 10^{-3} \text{ N/mm}^2 = 6.895 \times 10^{-2} \text{ bar}$

Temperature Conversion (Fahrenheit to Celsius): $t_C = \frac{5}{9} (t_F - 32)$

Material Specification Note

The provided pressure ratings are specifically for flanges made from *ASTM A-105 carbon steel forgings (Material Group 1.1). Ratings for other material groups (e.g., Group 1.2) will differ.

Interactive Charts

References

• Original Source