ASME B16.47 Class 900 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 | 40.25 mm | 6.06 mm | 30.00 mm | 2185 lb | 35.50 mm | 20 | 2.62 mm |
| 28 | 43.50 mm | 6.56 mm | 32.25 mm | 2762 lb | 38.25 mm | 20 | 2.88 mm |
| 30 | 46.50 mm | 6.93 mm | 34.50 mm | 3334 lb | 40.75 mm | 20 | 3.12 mm |
| 32 | 48.75 mm | 7.31 mm | 36.50 mm | 3865 lb | 43.00 mm | 20 | 3.12 mm |
| 34 | 51.75 mm | 7.68 mm | 39.00 mm | 4575 lb | 45.50 mm | 20 | 3.38 mm |
| 36 | 53.00 mm | 7.94 mm | 40.50 mm | 4963 lb | 47.25 mm | 24 | 3.12 mm |