ASME B16.47 Class 600 Series A Welding Neck Flanges
| Nominal Pipe Size | Outside Diameter (O) | Minimum Thickness (T) | Raised Face Diameter (R) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|
| 26 | 40.00 mm | 4.94 mm | 29.50 mm | 1760 lb | 36.00 mm | 28 | 2.00 mm |
| 28 | 42.25 mm | 5.19 mm | 31.50 mm | 2061 lb | 38.00 mm | 28 | 2.12 mm |
| 30 | 44.50 mm | 5.50 mm | 33.75 mm | 2423 lb | 40.25 mm | 28 | 2.12 mm |
| 32 | 47.00 mm | 5.81 mm | 36.00 mm | 2858 lb | 42.50 mm | 28 | 2.38 mm |
| 34 | 49.00 mm | 6.06 mm | 38.00 mm | 3237 lb | 44.50 mm | 28 | 2.38 mm |
| 36 | 51.75 mm | 6.38 mm | 40.25 mm | 3800 lb | 47.00 mm | 28 | 2.62 mm |
| 38 | 50.00 mm | 6.12 mm | 41.50 mm | 3405 lb | 45.75 mm | 28 | 2.38 mm |
| 40 | 52.00 mm | 6.38 mm | 43.75 mm | 3838 lb | 47.75 mm | 32 | 2.38 mm |
| 42 | 55.25 mm | 6.75 mm | 46.00 mm | 4585 lb | 50.50 mm | 28 | 2.62 mm |
| 44 | 57.25 mm | 7.00 mm | 48.25 mm | 5105 lb | 52.50 mm | 32 | 2.62 mm |
| 46 | 59.50 mm | 7.31 mm | 50.25 mm | 5758 lb | 54.75 mm | 32 | 2.62 mm |
| 48 | 62.75 mm | 7.69 mm | 52.50 mm | 6737 lb | 57.50 mm | 32 | 2.88 mm |
| 50 | 65.75 mm | 8.00 mm | 54.50 mm | 7695 lb | 60.00 mm | 28 | 3.12 mm |
| 52 | 67.75 mm | 8.25 mm | 56.50 mm | 8425 lb | 62.00 mm | 32 | 3.12 mm |
| 54 | 70.00 mm | 8.56 mm | 58.75 mm | 9333 lb | 64.25 mm | 32 | 3.12 mm |
| 56 | 73.00 mm | 8.88 mm | 60.75 mm | 10,530 lb | 66.75 mm | 32 | 3.38 mm |
| 58 | 75.00 mm | 9.12 mm | 63.00 mm | 11,414 lb | 68.75 mm | 32 | 3.38 mm |
| 60 | 78.50 mm | 9.56 mm | 65.25 mm | 13,108 lb | 71.75 mm | 28 | 3.62 mm |