Studs Cast Iron Flanges
Reference data and engineering information about studs cast iron flanges for material properties applications.
Overview
Engineering reference data for Studs Cast Iron Flanges in material science and properties.
Key Formulas
Stress
Force per unit area.
Strain
Change in length per original length.
Hooke's Law
Stress proportional to strain in elastic region.
Thermal Expansion
Length change due to temperature.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Stress | Pa | |
| Strain | — | |
| Young's modulus | Pa | |
| Thermal expansion coefficient | 1/°C | |
| Temperature change | °C |
Stud Sizes for Cast Iron Flanges
The stud sizes for cast iron flanges are determined by the flange class rating. Class 125 and Class 250 have different requirements for stud quantity, diameter, and length based on the nominal pipe size (NPS). All dimensions are for standard facing and standard pressure ratings flange to flange.
Cast Iron Flanges - Class 125
NPS(in) | No. of Studs(-) | Diameter of Stud(in) | Length of Stud(in) |
|---|---|---|---|
| 1/2 | 4 | 1/2 | 2-1/2 |
| 3/4 | 4 | 1/2 | 2-1/2 |
| 1 | 4 | 1/2 | 2-3/4 |
| 1-1/4 | 4 | 1/2 | 2-3/4 |
| 1-1/2 | 4 | 1/2 | 3 |
| 2 | 4 | 5/8 | 3-1/2 |
| 2-1/2 | 4 | 5/8 | 3-3/4 |
| 3 | 4 | 5/8 | 3-3/4 |
| 3-1/2 | 8 | 5/8 | 3-3/4 |
| 4 | 8 | 5/8 | 3-3/4 |
| 5 | 8 | 3/4 | 4 |
| 6 | 8 | 3/4 | 4-1/4 |
| 8 | 8 | 3/4 | 4-1/2 |
| 10 | 12 | 7/8 | 4-3/4 |
| 12 | 12 | 7/8 | 5 |
| 14 | 12 | 1 | 5-1/2 |
| 16 | 16 | 1 | 5-1/2 |
Source: engineeringtoolbox.com
Cast Iron Flanges - Class 250
NPS(in) | No. of Studs(-) | Diameter of Stud(in) | Length of Stud(in) |
|---|---|---|---|
| 1/2 | 4 | 1/2 | 2-3/4 |
| 3/4 | 4 | 5/8 | 3-1/4 |
| 1 | 4 | 5/8 | 3-1/4 |
| 1-1/4 | 4 | 5/8 | 3-1/2 |
| 1-1/2 | 4 | 5/8 | 3-3/4 |
| 2 | 8 | 5/8 | 3-3/4 |
| 2-1/2 | 8 | 5/8 | 4-1/4 |
| 3 | 8 | 5/8 | 4-1/2 |
| 3-1/2 | 8 | 5/8 | 4-1/2 |
| 4 | 8 | 5/8 | 4-3/4 |
| 5 | 8 | 5/8 | 5 |
| 6 | 12 | 5/8 | 5 |
| 8 | 12 | 7/8 | 5-3/4 |
| 10 | 16 | 1 | 6-1/2 |
| 12 | 16 | 1-1/8 | 7 |
| 14 | 20 | 1-1/8 | 7-1/4 |
| 16 | 20 | 1-1/4 | 7-3/4 |
Source: engineeringtoolbox.com
Unit Conversion Reference
To convert stud dimensions from inches to millimeters, multiply by 25.4. For example, a 5/8 inch stud diameter equals .