ASME B16.47 Class 900 Series B Welding Neck Flanges
-
- 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 | Bore (B) | Top of Hub (A) | Hub Diameter (X) | Minimum Fillet Radius (r) | Minimum Thickness (T) | Length Thru Hub (Y) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 40.25 | 35.50 | 30.00 | 20 | 2.62 | Specified by purchaser | 26.00 | 29.25 | 0.44 | 5.31 | 10.19 | 1050 |
| 28 | 43.50 | 38.25 | 32.25 | 20 | 2.88 | Specified by purchaser | 28.00 | 31.38 | 0.50 | 5.81 | 10.88 | 1520 |
| 30 | 46.50 | 40.75 | 34.50 | 20 | 3.12 | Specified by purchaser | 30.00 | 33.50 | 0.50 | 6.12 | 11.38 | 1820 |
| 32 | 48.75 | 43.00 | 36.50 | 20 | 3.12 | Specified by purchaser | 32.00 | 35.75 | 0.50 | 6.31 | 11.94 | 2065 |
| 34 | 51.75 | 45.50 | 39.00 | 20 | 3.38 | Specified by purchaser | 34.00 | 37.88 | 0.56 | 6.75 | 12.56 | 2450 |
| 36 | 53.00 | 47.25 | 40.50 | 24 | 3.12 | Specified by purchaser | 36.00 | 40.00 | 0.56 | 6.81 | 12.81 | 2520 |
| 38 | 57.50 | 50.75 | 43.25 | 20 | 3.62 | Specified by purchaser | 38.00 | 42.25 | 0.75 | 7.50 | 13.88 | 3385 |
| 40 | 59.50 | 52.75 | 45.75 | 24 | 3.62 | Specified by purchaser | 40.00 | 44.38 | 0.81 | 7.75 | 14.31 | 3620 |
| 42 | 61.50 | 54.75 | 47.75 | 24 | 3.62 | Specified by purchaser | 42.00 | 46.31 | 0.81 | 8.12 | 14.62 | 3960 |
| 44 | 64.88 | 57.62 | 50.00 | 24 | 3.88 | Specified by purchaser | 44.00 | 48.62 | 0.88 | 8.44 | 15.38 | 4300 |
| 46 | 68.25 | 60.50 | 52.50 | 24 | 4.12 | Specified by purchaser | 46.00 | 50.88 | 0.88 | 8.88 | 16.18 | 4640 |
| 48 | 70.25 | 62.50 | 54.50 | 24 | 4.12 | Specified by purchaser | 48.00 | 52.88 | 0.94 | 9.19 | 16.50 | 4980 |