ASTM A105 flange dimensions refer to the size specifications (diameter, thickness, bolt circle, etc.) of flanges made from ASTM A105 carbon steel. These dimensions follow standard flange specifications such as ASME B16.5 or ASME B16.47, not ASTM A105 itself.
Below is a summary of ASTM A105 flange dimensions for Class 150 flanges (ASME B16.5 standard, NPS 1" to 12"):
| NPS | OD (mm) | Thickness (mm) | Bolt Circle (mm) | No. of Bolts | Bolt Hole Dia. (mm) |
|---|---|---|---|---|---|
| 1" | 90 | 11.2 | 60.3 | 4 | 16 |
| 2" | 150 | 12.7 | 120.7 | 4 | 19 |
| 3" | 190 | 15.9 | 152.4 | 4 | 19 |
| 4" | 229 | 17.5 | 190.5 | 8 | 19 |
| 6" | 279 | 19.1 | 241.3 | 8 | 22 |
| 8" | 343 | 23.9 | 298.5 | 8 | 22 |
| 10" | 406 | 25.4 | 362 | 12 | 25 |
| 12" | 483 | 25.4 | 431.8 | 12 | 25 |
Notes:
OD = Outside Diameter
Thickness = Flange thickness (excluding hub)
Dimensions may vary depending on flange type: Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint
For pressure classes 300, 600, 900, 1500, or 2500, the dimensions will differ accordingly.
If you need dimensions for a specific flange type or pressure class, let me know and I can provide detailed tables or drawings.
