ASME B16.47 Class 75 Series B Blind Flanges
| Nominal Pipe Size | Outside Diameter (O) | Minimum Thickness (T) | Raised Face Diameter (R) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|
| 26 | 30.00 mm | 1.31 mm | 27.75 mm | 255 lb | 28.50 mm | 36 | 0.75 mm |
| 28 | 32.00 mm | 1.31 mm | 29.75 mm | 290 lb | 30.50 mm | 40 | 0.75 mm |
| 30 | 34.00 mm | 1.31 mm | 31.75 mm | 330 lb | 32.50 mm | 44 | 0.75 mm |
| 32 | 36.00 mm | 1.44 mm | 33.75 mm | 390 lb | 34.50 mm | 48 | 0.75 mm |
| 34 | 38.00 mm | 1.50 mm | 35.75 mm | 430 lb | 36.50 mm | 52 | 0.75 mm |
| 36 | 40.69 mm | 1.67 mm | 38.00 mm | 520 lb | 39.06 mm | 40 | 0.88 mm |
| 38 | 42.69 mm | 1.75 mm | 40.00 mm | 595 lb | 41.06 mm | 40 | 0.88 mm |
| 40 | 44.69 mm | 1.75 mm | 42.00 mm | 760 lb | 43.06 mm | 44 | 0.88 mm |
| 42 | 46.69 mm | 1.88 mm | 44.00 mm | 895 lb | 45.06 mm | 48 | 0.88 mm |
| 44 | 49.25 mm | 1.94 mm | 46.25 mm | 1065 lb | 47.38 mm | 36 | 1.00 mm |
| 46 | 51.25 mm | 2.00 mm | 48.25 mm | 1185 lb | 49.38 mm | 40 | 1.00 mm |
| 48 | 53.25 mm | 2.12 mm | 50.25 mm | 1315 lb | 51.38 mm | 44 | 1.00 mm |
| 50 | 55.25 mm | 2.18 mm | 52.25 mm | 1505 lb | 53.38 mm | 44 | 1.00 mm |
| 52 | 57.38 mm | 2.25 mm | 54.25 mm | 1665 lb | 55.50 mm | 48 | 1.00 mm |
| 54 | 59.38 mm | 2.38 mm | 56.25 mm | 1840 lb | 57.50 mm | 48 | 1.00 mm |
| 56 | 62.00 mm | 2.44 mm | 58.50 mm | 2111 lb | 59.88 mm | 40 | 1.12 mm |
| 58 | 64.00 mm | 2.50 mm | 60.50 mm | 2300 lb | 61.88 mm | 44 | 1.12 mm |
| 60 | 66.00 mm | 2.62 mm | 62.50 mm | 2500 lb | 63.88 mm | 44 | 1.12 mm |