ASME B16.47 Class 400 Series B Blind Flanges
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- All dimensions are in inches
- These flanges will be furnished with a 1/4″ raised face unless otherwise specified.
(Size Chart)
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 33.50 | 30.75 | 28.00 | 28 | 1.50 | 3.50 | 875 |
| 28 | 36.00 | 33.00 | 30.00 | 24 | 1.62 | 3.75 | 1081 |
| 30 | 38.25 | 35.25 | 32.25 | 28 | 1.62 | 4.00 | 1302 |
| 32 | 40.75 | 37.50 | 34.38 | 28 | 1.75 | 4.25 | 1570 |
| 34 | 42.75 | 39.50 | 36.50 | 32 | 1.75 | 4.38 | 1780 |
| 36 | 45.50 | 42.00 | 38.62 | 28 | 1.88 | 4.69 | 2160 |
| 38 | 47.50 | 44.00 | 40.75 | 32 | 1.88 | 4.88 | 2450 |
| 40 | 50.00 | 46.25 | 43.00 | 32 | 2.00 | 5.12 | 2849 |
| 42 | 52.00 | 48.25 | 45.00 | 32 | 2.00 | 5.25 | 3160 |
| 44 | 54.50 | 50.50 | 47.25 | 32 | 2.12 | 5.50 | 3635 |
| 46 | 56.75 | 52.75 | 49.50 | 36 | 2.12 | 5.75 | 4120 |
| 48 | 59.50 | 55.25 | 51.50 | 28 | 2.38 | 6.00 | 4725 |
| 50 | 61.75 | 57.50 | 53.62 | 32 | 2.38 | 6.25 | 5303 |
| 52 | 63.75 | 59.50 | 55.62 | 32 | 2.38 | 6.44 | 5823 |
| 54 | 67.00 | 62.25 | 57.88 | 28 | 2.62 | 6.75 | 6742 |
| 56 | 69.00 | 64.25 | 60.12 | 32 | 2.62 | 6.94 | 7352 |
| 58 | 71.00 | 66.25 | 62.12 | 32 | 2.62 | 7.12 | 7986 |
| 60 | 74.25 | 69.00 | 64.38 | 32 | 2.88 | 7.44 | 9126 |