Here is a detailed ASTM A105 Class 150 flange dimension table based on ASME B16.5 (covers NPS 1/2" to 24"):
🛠 Flange Material: ASTM A105 (Carbon Steel)
📏 Class: 150
📘 Standard: ASME B16.5
📌 Type: General (Weld Neck, Slip-On, Blind, etc.-basic dimensions are shared)
ASTM A105 Class 150 Flange Dimensions (ASME B16.5)
| NPS (in) | OD (mm) | Thickness T (mm) | Bolt Circle (BC) (mm) | Bolt Hole Dia. (mm) | No. of Bolts | Raised Face (RF) (mm) |
|---|---|---|---|---|---|---|
| 1/2" | 89 | 11.2 | 60.3 | 15.9 | 4 | 2 |
| 3/4" | 98 | 12.7 | 69.9 | 15.9 | 4 | 2 |
| 1" | 108 | 14.3 | 79.4 | 15.9 | 4 | 2 |
| 1-1/4" | 117 | 15.9 | 88.9 | 15.9 | 4 | 2 |
| 1-1/2" | 127 | 17.5 | 98.4 | 15.9 | 4 | 2 |
| 2" | 152 | 19.1 | 120.7 | 19.1 | 4 | 2 |
| 2-1/2" | 178 | 22.3 | 139.7 | 19.1 | 4 | 2 |
| 3" | 190 | 23.9 | 152.4 | 19.1 | 4 | 2 |
| 4" | 229 | 23.9 | 190.5 | 19.1 | 8 | 2 |
| 5" | 254 | 22.3 | 215.9 | 22.2 | 8 | 2 |
| 6" | 279 | 25.4 | 241.3 | 22.2 | 8 | 2 |
| 8" | 343 | 28.6 | 298.5 | 22.2 | 8 | 2 |
| 10" | 406 | 30.2 | 362.0 | 25.4 | 12 | 2 |
| 12" | 483 | 31.8 | 431.8 | 25.4 | 12 | 2 |
| 14" | 533 | 35.0 | 476.3 | 28.6 | 12 | 2 |
| 16" | 597 | 36.6 | 539.8 | 28.6 | 16 | 2 |
| 18" | 635 | 39.7 | 577.9 | 31.8 | 16 | 2 |
| 20" | 698 | 42.9 | 635.0 | 31.8 | 20 | 2 |
| 24" | 813 | 47.8 | 749.3 | 34.9 | 20 | 2 |
✅ Notes:
OD = Outside Diameter
T = Flange Thickness
BC = Bolt Circle
All dimensions in millimeters (mm)
Raised Face height is 2 mm for Class 150
Dimensions apply to Weld Neck, Slip-On, Blind, and Socket Weld types (with slight differences for hub lengths, which are not shown here)
Let me know if you need this in inches, a PDF drawing, or dimensions for a specific flange type (Weld Neck, Blind, etc.).
