Table 7 AWWA C207-18 Class B Blind Flanges
| Nominal Pipe Size | Working Pressure | Outside Diameter (A) | Minimum Thickness (T) | Approximate Weight | Number of Bolt Holes | Diameter of Bolt Holes | Diameter of Bolt Circle (C) |
|---|---|---|---|---|---|---|---|
| 4 | 86 psi | 9.00 mm | 0.63 mm | 5 lb | 8 | 0.75 mm | 7.50 mm |
| 5 | 86 psi | 10.00 mm | 0.63 mm | 7 lb | 8 | 0.88 mm | 8.50 mm |
| 6 | 86 psi | 11.00 mm | 0.69 mm | 8 lb | 8 | 0.88 mm | 9.50 mm |
| 8 | 86 psi | 13.50 mm | 0.69 mm | 11 lb | 8 | 0.88 mm | 11.75 mm |
| 10 | 86 psi | 16.00 mm | 0.69 mm | 52 lb | 12 | 1.00 mm | 14.25 mm |
| 12 | 86 psi | 19.00 mm | 0.72 mm | 68 lb | 12 | 1.00 mm | 17.00 mm |
| 14 | 86 psi | 21.00 mm | 0.79 mm | 90 lb | 12 | 1.13 mm | 18.75 mm |
| 16 | 86 psi | 23.50 mm | 0.89 mm | 125 lb | 16 | 1.13 mm | 21.25 mm |
| 18 | 86 psi | 25.00 mm | 0.95 mm | 149 lb | 16 | 1.25 mm | 22.75 mm |
| 20 | 86 psi | 27.50 mm | 1.04 mm | 207 lb | 20 | 1.25 mm | 25.00 mm |
| 22 | 86 psi | 29.50 mm | 1.13 mm | 255 lb | 20 | 1.38 mm | 27.25 mm |
| 24 | 86 psi | 32.00 mm | 1.22 mm | 320 lb | 20 | 1.38 mm | 29.50 mm |
| 26 | 86 psi | 34.25 mm | 1.31 mm | 390 lb | 24 | 1.38 mm | 31.75 mm |
| 28 | 86 psi | 36.50 mm | 1.40 mm | 470 lb | 28 | 1.38 mm | 34.00 mm |
| 30 | 86 psi | 38.75 mm | 1.48 mm | 546 lb | 28 | 1.38 mm | 36.00 mm |
| 32 | 86 psi | 41.75 mm | 1.58 mm | 686 lb | 28 | 1.63 mm | 38.50 mm |
| 34 | 86 psi | 43.75 mm | 1.66 mm | 787 lb | 32 | 1.63 mm | 40.50 mm |
| 36 | 86 psi | 46.00 mm | 1.75 mm | 913 lb | 32 | 1.63 mm | 42.75 mm |
| 38 | 86 psi | 48.75 mm | 1.85 mm | 1079 lb | 32 | 1.63 mm | 45.25 mm |
| 40 | 86 psi | 50.75 mm | 1.93 mm | 1215 lb | 36 | 1.63 mm | 47.25 mm |
| 42 | 86 psi | 53.00 mm | 2.02 mm | 1382 lb | 36 | 1.63 mm | 49.50 mm |
| 44 | 86 psi | 55.25 mm | 2.11 mm | 1563 lb | 40 | 1.63 mm | 51.75 mm |
| 46 | 86 psi | 57.25 mm | 2.19 mm | 1737 lb | 40 | 1.63 mm | 53.75 mm |
| 48 | 86 psi | 59.50 mm | 2.29 mm | 1948 lb | 44 | 1.63 mm | 56.00 mm |
| 50 | 86 psi | 61.75 mm | 2.38 mm | 2176 lb | 44 | 1.88 mm | 58.25 mm |
| 52 | 86 psi | 64.00 mm | 2.47 mm | 2420 lb | 44 | 1.88 mm | 60.50 mm |
| 54 | 86 psi | 66.25 mm | 2.56 mm | 2682 lb | 44 | 1.88 mm | 62.75 mm |
| 60 | 86 psi | 73.00 mm | 2.82 mm | 3566 lb | 52 | 1.88 mm | 69.25 mm |
| 66 | 86 psi | 80.00 mm | 3.09 mm | 4670 lb | 52 | 1.88 mm | 76.00 mm |
| 72 | 86 psi | 86.50 mm | 3.35 mm | 5894 lb | 60 | 1.88 mm | 82.50 mm |