ASME B16.47 Class 150 Series B Blind Flanges
| Nominal Pipe Size | Outside Diameter (O) | Maximum Thickness (T) | Raised Face Diameter (R) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|
| 26 | 30.94 mm | 1.75 mm | 28.00 mm | 375 lb | 29.31 mm | 36 | 0.88 mm |
| 28 | 32.94 mm | 1.88 mm | 30.00 mm | 455 lb | 31.31 mm | 40 | 0.88 mm |
| 30 | 34.94 mm | 2.00 mm | 32.00 mm | 545 lb | 33.31 mm | 44 | 0.88 mm |
| 32 | 37.06 mm | 2.12 mm | 34.00 mm | 648 lb | 35.44 mm | 48 | 0.88 mm |
| 34 | 39.56 mm | 2.25 mm | 36.25 mm | 782 lb | 37.69 mm | 40 | 1.00 mm |
| 36 | 41.62 mm | 2.31 mm | 38.25 mm | 890 lb | 39.75 mm | 44 | 1.00 mm |
| 38 | 44.25 mm | 2.50 mm | 40.25 mm | 1090 lb | 42.12 mm | 40 | 1.12 mm |
| 40 | 46.25 mm | 2.62 mm | 42.50 mm | 1247 lb | 44.12 mm | 44 | 1.12 mm |
| 42 | 48.25 mm | 2.69 mm | 44.50 mm | 1393 lb | 46.12 mm | 48 | 1.12 mm |
| 44 | 50.25 mm | 2.81 mm | 46.50 mm | 1579 lb | 48.12 mm | 52 | 1.12 mm |
| 46 | 52.81 mm | 2.94 mm | 48.62 mm | 1825 lb | 50.56 mm | 40 | 1.25 mm |
| 48 | 54.81 mm | 3.06 mm | 50.75 mm | 2045 lb | 52.56 mm | 44 | 1.25 mm |
| 50 | 56.81 mm | 3.18 mm | 52.75 mm | 2284 lb | 54.56 mm | 48 | 1.25 mm |
| 52 | 58.81 mm | 3.31 mm | 54.75 mm | 2547 lb | 56.56 mm | 52 | 1.25 mm |
| 54 | 61.00 mm | 3.44 mm | 56.75 mm | 2848 lb | 58.75 mm | 56 | 1.25 mm |
| 56 | 63.00 mm | 3.56 mm | 58.75 mm | 3145 lb | 60.75 mm | 60 | 1.25 mm |
| 58 | 65.94 mm | 3.68 mm | 60.75 mm | 3560 lb | 63.44 mm | 48 | 1.38 mm |
| 60 | 67.94 mm | 3.81 mm | 63.00 mm | 3913 lb | 65.44 mm | 52 | 1.38 mm |