ASME B16.47 Class 300 Series A Welding Neck Flanges
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- All dimensions are in inches
- Standard Bore will be furnished unless otherwise specified.
- These flanges will be furnished with a 1/16″ 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 | 38.25 | 34.50 | 29.50 | 28 | 1.75 | Specified by purchaser | 26.00 | 28.38 | 0.38 | 3.12 | 7.25 | 605 |
| 28 | 40.75 | 37.00 | 31.50 | 28 | 1.75 | Specified by purchaser | 28.00 | 30.50 | 0.44 | 3.38 | 7.75 | 745 |
| 30 | 43.00 | 39.25 | 33.75 | 28 | 1.88 | Specified by purchaser | 30.00 | 32.56 | 0.44 | 3.62 | 8.25 | 870 |
| 32 | 45.25 | 41.50 | 36.00 | 28 | 2.00 | Specified by purchaser | 32.00 | 34.69 | 0.44 | 3.88 | 8.75 | 1005 |
| 34 | 47.50 | 43.50 | 38.00 | 28 | 2.00 | Specified by purchaser | 34.00 | 36.88 | 0.50 | 4.00 | 9.12 | 1145 |
| 36 | 50.00 | 46.00 | 40.25 | 32 | 2.12 | Specified by purchaser | 36.00 | 39.00 | 0.50 | 4.12 | 9.50 | 1275 |
| 38 | 46.00 | 43.00 | 40.50 | 32 | 1.62 | Specified by purchaser | 38.00 | 39.12 | 0.50 | 4.25 | 7.12 | 695 |
| 40 | 48.75 | 45.50 | 42.75 | 32 | 1.75 | Specified by purchaser | 40.00 | 41.25 | 0.50 | 4.50 | 7.62 | 840 |
| 42 | 50.75 | 47.50 | 44.75 | 32 | 1.75 | Specified by purchaser | 42.00 | 43.25 | 0.50 | 4.69 | 7.88 | 950 |
| 44 | 53.25 | 49.75 | 47.00 | 32 | 1.88 | Specified by purchaser | 44.00 | 45.25 | 0.50 | 4.88 | 8.12 | 1055 |
| 46 | 55.75 | 52.00 | 49.00 | 28 | 2.00 | Specified by purchaser | 46.00 | 47.38 | 0.50 | 5.06 | 8.50 | 1235 |
| 48 | 57.75 | 54.00 | 51.25 | 32 | 2.00 | Specified by purchaser | 48.00 | 49.38 | 0.50 | 5.25 | 8.81 | 1380 |
| 50 | 60.25 | 56.25 | 53.50 | 32 | 2.12 | Specified by purchaser | 50.00 | 51.38 | 0.50 | 5.50 | 9.12 | 1530 |
| 52 | 62.25 | 58.25 | 55.50 | 32 | 2.12 | Specified by purchaser | 52.00 | 53.38 | 0.50 | 5.69 | 9.38 | 1660 |
| 54 | 65.25 | 61.00 | 57.75 | 28 | 2.38 | Specified by purchaser | 54.00 | 55.50 | 0.50 | 6.00 | 9.94 | 2050 |
| 56 | 67.25 | 63.00 | 59.75 | 28 | 2.38 | Specified by purchaser | 56.00 | 57.62 | 0.50 | 6.06 | 10.25 | 2155 |
| 58 | 69.25 | 65.00 | 62.00 | 32 | 2.38 | Specified by purchaser | 58.00 | 59.62 | 0.50 | 6.25 | 10.50 | 2270 |
| 60 | 71.25 | 67.00 | 64.00 | 32 | 2.38 | Specified by purchaser | 60.00 | 61.62 | 0.50 | 6.44 | 10.75 | 2470 |