ASME B16.47 Class 300 Series B 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 | 34.12 | 31.62 | 29.00 | 32 | 1.38 | Specified by purchaser | 26.19 | 27.62 | 0.56 | 3.50 | 5.69 | 400 |
| 28 | 36.25 | 33.75 | 31.00 | 36 | 1.38 | Specified by purchaser | 28.19 | 29.75 | 0.56 | 3.50 | 5.88 | 450 |
| 30 | 39.00 | 36.25 | 33.25 | 36 | 1.50 | Specified by purchaser | 30.25 | 32.00 | 0.56 | 3.69 | 6.22 | 550 |
| 32 | 41.50 | 38.50 | 35.50 | 32 | 1.62 | Specified by purchaser | 32.25 | 34.00 | 0.62 | 4.06 | 6.62 | 685 |
| 34 | 43.62 | 40.62 | 37.50 | 36 | 1.62 | Specified by purchaser | 34.25 | 36.12 | 0.62 | 4.06 | 6.81 | 750 |
| 36 | 46.12 | 42.88 | 39.75 | 32 | 1.75 | Specified by purchaser | 36.25 | 38.00 | 0.62 | 4.06 | 7.12 | 840 |
| 38 | 48.12 | 44.88 | 41.75 | 36 | 1.75 | Specified by purchaser | 38.25 | 40.00 | 0.62 | 4.38 | 7.56 | 915 |
| 40 | 50.12 | 46.88 | 43.88 | 40 | 1.75 | Specified by purchaser | 40.25 | 42.00 | 0.62 | 4.56 | 7.81 | 990 |
| 42 | 52.50 | 49.00 | 46.00 | 36 | 1.88 | Specified by purchaser | 42.31 | 44.00 | 0.62 | 4.69 | 8.06 | 1135 |
| 44 | 54.50 | 51.00 | 48.00 | 40 | 1.88 | Specified by purchaser | 44.31 | 46.19 | 0.62 | 5.00 | 8.44 | 1235 |
| 46 | 57.50 | 53.75 | 50.00 | 36 | 2.00 | Specified by purchaser | 46.31 | 48.38 | 0.62 | 5.06 | 8.75 | 1470 |
| 48 | 59.50 | 55.75 | 52.25 | 40 | 2.00 | Specified by purchaser | 48.31 | 50.31 | 0.62 | 5.06 | 8.81 | 1575 |
| 50 | 61.50 | 57.75 | 54.25 | 44 | 2.00 | Specified by purchaser | 50.31 | 52.38 | 0.62 | 5.44 | 9.25 | 1710 |
| 52 | 63.50 | 59.75 | 56.25 | 48 | 2.00 | Specified by purchaser | 52.31 | 54.44 | 0.62 | 5.62 | 9.56 | 1840 |
| 54 | 65.88 | 62.12 | 58.25 | 48 | 2.00 | Specified by purchaser | 54.31 | 56.50 | 0.62 | 5.38 | 9.44 | 1980 |
| 56 | 69.50 | 65.00 | 60.50 | 36 | 2.38 | Specified by purchaser | 56.31 | 58.81 | 0.69 | 6.06 | 10.56 | 2595 |
| 58 | 71.94 | 67.44 | 62.75 | 40 | 2.38 | Specified by purchaser | 58.31 | 60.94 | 0.69 | 6.06 | 10.81 | 2770 |
| 60 | 73.94 | 69.44 | 65.00 | 40 | 2.38 | Specified by purchaser | 60.31 | 62.94 | 0.69 | 5.94 | 10.69 | 2870 |