ASME B16.47 Class 600 Series B Welding Neck 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 | Bore (B) | Top of Hub (A) | Hub Diameter (X) | Minimum Fillet Radius (r) | Minimum Thickness (T) | Length Thru Hub (Y) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 35.00 | 31.75 | 28.62 | 28 | 1.75 | Specified by purchaser | 26.00 | 27.50 | 0.50 | 4.38 | 7.12 | 550 |
| 28 | 37.50 | 34.00 | 30.88 | 28 | 1.88 | Specified by purchaser | 28.00 | 29.62 | 0.50 | 4.56 | 7.50 | 650 |
| 30 | 40.25 | 36.50 | 33.12 | 28 | 2.00 | Specified by purchaser | 30.00 | 31.75 | 0.50 | 4.94 | 8.06 | 810 |
| 32 | 42.75 | 38.75 | 35.25 | 28 | 2.12 | Specified by purchaser | 32.00 | 33.88 | 0.50 | 5.12 | 8.50 | 950 |
| 34 | 45.75 | 41.50 | 37.50 | 24 | 2.38 | Specified by purchaser | 34.00 | 36.00 | 0.56 | 5.56 | 9.19 | 1205 |
| 36 | 47.75 | 43.50 | 39.75 | 28 | 2.38 | Specified by purchaser | 36.00 | 38.12 | 0.56 | 5.75 | 9.56 | 1340 |
| 38 | 50.00 | 45.75 | 41.50 | 28 | 2.38 | Specified by purchaser | 38.00 | 40.25 | 0.56 | 6.00 | 10.00 | 1470 |
| 40 | 52.00 | 47.75 | 43.75 | 32 | 2.38 | Specified by purchaser | 40.00 | 42.25 | 0.56 | 6.25 | 10.38 | 1630 |
| 42 | 55.25 | 50.50 | 46.00 | 28 | 2.62 | Specified by purchaser | 42.00 | 44.38 | 0.56 | 6.62 | 11.00 | 2030 |
| 44 | 57.25 | 52.50 | 48.25 | 32 | 2.62 | Specified by purchaser | 44.00 | 46.50 | 0.56 | 6.81 | 11.38 | 2160 |
| 46 | 59.50 | 54.75 | 50.25 | 32 | 2.62 | Specified by purchaser | 46.00 | 48.62 | 0.56 | 7.06 | 11.81 | 2410 |
| 48 | 62.75 | 57.50 | 52.50 | 32 | 2.88 | Specified by purchaser | 48.00 | 50.75 | 0.56 | 7.44 | 12.44 | 2855 |
| 50 | 65.75 | 60.00 | 54.50 | 28 | 3.12 | Specified by purchaser | 50.00 | 52.88 | 0.56 | 7.75 | 12.94 | 3330 |
| 52 | 67.75 | 62.00 | 56.50 | 32 | 3.12 | Specified by purchaser | 52.00 | 54.88 | 0.56 | 8.00 | 13.25 | 3560 |
| 54 | 70.00 | 64.25 | 58.75 | 32 | 3.12 | Specified by purchaser | 54.00 | 57.00 | 0.56 | 8.25 | 13.75 | 3920 |
| 56 | 73.00 | 66.75 | 60.75 | 32 | 3.38 | Specified by purchaser | 56.00 | 59.12 | 0.62 | 8.56 | 14.25 | 4280 |
| 58 | 75.00 | 68.75 | 63.00 | 32 | 3.38 | Specified by purchaser | 58.00 | 61.12 | 0.62 | 8.75 | 14.56 | 4640 |
| 60 | 78.50 | 71.75 | 65.25 | 28 | 3.62 | Specified by purchaser | 60.00 | 63.38 | 0.69 | 9.19 | 15.31 | 5000 |