Blind Flange
ASME/ANSI B16.5 Class 900 Blind Flanges
SPECIFICATIONS
▪ All dimensions are in inches
▪ These flanges will be furnished with a 1/4" raised face unless otherwise specified
▪ Flat face option available
| Nominal Pipe Size |
Outside Diameter | Thickness | Raised Face Diameter | Approximate Weight | Bolt Circle | Number of Holes |
Diameter of Holes |
| (O) | (T) | (R) | (lbs) | (C) | |||
| 1/2 | 4.75 | 0.88 | 1.38 | 4 | 3.25 | 4 | 0.88 |
| 3/4 | 5.13 | 1.00 | 1.69 | 6 | 3.50 | 4 | 0.88 |
| 1 | 5.88 | 1.13 | 2.00 | 8 | 4.00 | 4 | 1.00 |
| 1 1/4 | 6.25 | 1.13 | 2.50 | 9 | 4.38 | 4 | 1.00 |
| 1 1/2 | 7.00 | 1.25 | 2.88 | 13 | 4.88 | 4 | 1.13 |
| 2 | 8.50 | 1.50 | 3.63 | 25 | 6.50 | 8 | 1.00 |
| 2 1/2 | 9.63 | 1.63 | 4.13 | 35 | 7.50 | 8 | 1.13 |
| 3 | 9.50 | 1.50 | 5.00 | 29 | 7.50 | 8 | 1.00 |
| 4 | 11.50 | 1.75 | 6.19 | 54 | 9.25 | 8 | 1.25 |
| 5 | 13.75 | 2.00 | 7.31 | 87 | 11.00 | 8 | 1.38 |
| 6 | 15.00 | 2.19 | 8.50 | 115 | 12.50 | 12 | 1.25 |
| 8 | 18.50 | 2.50 | 10.63 | 200 | 15.50 | 12 | 1.50 |
| 10 | 21.50 | 2.75 | 12.75 | 290 | 18.50 | 16 | 1.50 |
| 12 | 24.00 | 3.13 | 15.00 | 415 | 21.00 | 20 | 1.50 |
| 14 | 25.25 | 3.38 | 16.25 | 520 | 22.00 | 20 | 1.63 |
| 16 | 27.75 | 3.50 | 18.50 | 600 | 24.25 | 20 | 1.75 |
| 18 | 31.00 | 4.00 | 21.00 | 850 | 27.00 | 20 | 2.00 |
| 20 | 33.75 | 4.25 | 23.00 | 1075 | 29.50 | 20 | 2.13 |
| 24 | 41.00 | 5.50 | 27.25 | 2025 | 35.50 | 20 | 2.63 |