ASME B16.47 Class 400 Series A 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 | 38.25 mm | 3.88 mm | 29.50 mm | 1263 lb | 34.50 mm | 28 | 1.88 mm |
| 28 | 40.75 mm | 4.12 mm | 31.50 mm | 1520 lb | 37.00 mm | 28 | 2.00 mm |
| 30 | 43.00 mm | 4.38 mm | 33.75 mm | 1802 lb | 39.25 mm | 28 | 2.12 mm |
| 32 | 45.25 mm | 4.56 mm | 36.00 mm | 2075 lb | 41.50 mm | 28 | 2.12 mm |
| 34 | 47.50 mm | 4.81 mm | 38.00 mm | 2415 lb | 43.50 mm | 28 | 2.12 mm |
| 36 | 50.00 mm | 5.06 mm | 40.25 mm | 2815 lb | 46.00 mm | 32 | 2.12 mm |
| 38 | 47.50 mm | 4.88 mm | 40.75 mm | 2450 lb | 44.00 mm | 32 | 1.88 mm |
| 40 | 50.00 mm | 5.12 mm | 43.00 mm | 2849 lb | 46.25 mm | 32 | 2.00 mm |
| 42 | 52.00 mm | 5.25 mm | 45.00 mm | 3160 lb | 48.25 mm | 32 | 2.00 mm |
| 44 | 54.50 mm | 5.50 mm | 47.25 mm | 3635 lb | 50.50 mm | 32 | 2.12 mm |
| 46 | 56.75 mm | 5.75 mm | 49.50 mm | 4120 lb | 52.75 mm | 36 | 2.12 mm |
| 48 | 59.50 mm | 6.00 mm | 51.50 mm | 4725 lb | 55.25 mm | 28 | 2.38 mm |
| 50 | 61.75 mm | 6.25 mm | 53.62 mm | 5303 lb | 57.50 mm | 32 | 2.38 mm |
| 52 | 63.75 mm | 6.44 mm | 55.62 mm | 5823 lb | 59.50 mm | 32 | 2.38 mm |
| 54 | 67.00 mm | 6.75 mm | 57.88 mm | 6742 lb | 62.25 mm | 28 | 2.62 mm |
| 56 | 69.00 mm | 6.94 mm | 60.12 mm | 7352 lb | 64.25 mm | 32 | 2.62 mm |
| 58 | 71.00 mm | 7.12 mm | 62.12 mm | 7986 lb | 66.25 mm | 32 | 2.62 mm |
| 60 | 74.25 mm | 7.44 mm | 64.38 mm | 9126 lb | 69.00 mm | 32 | 2.88 mm |