ANSI B16.5 Class 150 Blind Flanges
-
- All dimensions are in inches
- These flanges will be furnished with a 1/16″ raised face unless otherwise specified.
(Size Chart)
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 3.50 | 2.38 | 1.38 | 4 | 0.62 | 0.38 | 1 |
| 3/4 | 3.88 | 2.75 | 1.69 | 4 | 0.62 | 0.44 | 2 |
| 1 | 4.25 | 3.12 | 2.00 | 4 | 0.62 | 0.50 | 2 |
| 1 1/4 | 4.62 | 3.50 | 2.50 | 4 | 0.62 | 0.56 | 3 |
| 1 1/2 | 5.00 | 3.88 | 2.88 | 4 | 0.62 | 0.62 | 4 |
| 2 | 6.00 | 4.75 | 3.62 | 4 | 0.75 | 0.69 | 5 |
| 2 1/2 | 7.00 | 5.50 | 4.12 | 4 | 0.75 | 0.81 | 7 |
| 3 | 7.50 | 6.00 | 5.00 | 4 | 0.75 | 0.88 | 9 |
| 3 1/2 | 8.50 | 7.00 | 5.50 | 8 | 0.75 | 0.88 | 13 |
| 4 | 9.00 | 7.50 | 6.19 | 8 | 0.75 | 0.88 | 17 |
| 5 | 10.00 | 8.50 | 7.31 | 8 | 0.88 | 0.88 | 20 |
| 6 | 11.00 | 9.50 | 8.50 | 8 | 0.88 | 0.94 | 26 |
| 8 | 13.50 | 11.75 | 10.62 | 8 | 0.88 | 1.06 | 45 |
| 10 | 16.00 | 14.25 | 12.75 | 12 | 1.00 | 1.12 | 70 |
| 12 | 19.00 | 17.00 | 15.00 | 12 | 1.00 | 1.19 | 110 |
| 14 | 21.00 | 18.75 | 16.25 | 12 | 1.12 | 1.31 | 140 |
| 16 | 23.50 | 21.25 | 18.50 | 16 | 1.12 | 1.38 | 180 |
| 18 | 25.00 | 22.75 | 21.00 | 16 | 1.25 | 1.50 | 220 |
| 20 | 27.50 | 25.00 | 23.00 | 20 | 1.25 | 1.62 | 285 |
| 22 | 29.50 | 27.25 | 25.25 | 20 | 1.38 | 1.75 | 355 |
| 24 | 32.00 | 29.50 | 27.25 | 20 | 1.38 | 1.81 | 430 |