ASME B16.47 Class 600 Series B Welding Neck Flanges
| Nominal Pipe Size | Outside Diameter (O) | Minimum Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Minimum Fillet Radius (r) | Top of Hub (A) | Bore (B) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 35.00 in | 4.38 in | 28.62 in | 7.12 in | 27.50 in | 0.50 in | 26.00 in | Specified by purchaser | 550 lb | 31.75 in | 28 | 1.75 in |
| 28 | 37.50 in | 4.56 in | 30.88 in | 7.50 in | 29.62 in | 0.50 in | 28.00 in | Specified by purchaser | 650 lb | 34.00 in | 28 | 1.88 in |
| 30 | 40.25 in | 4.94 in | 33.12 in | 8.06 in | 31.75 in | 0.50 in | 30.00 in | Specified by purchaser | 810 lb | 36.50 in | 28 | 2.00 in |
| 32 | 42.75 in | 5.12 in | 35.25 in | 8.50 in | 33.88 in | 0.50 in | 32.00 in | Specified by purchaser | 950 lb | 38.75 in | 28 | 2.12 in |
| 34 | 45.75 in | 5.56 in | 37.50 in | 9.19 in | 36.00 in | 0.56 in | 34.00 in | Specified by purchaser | 1205 lb | 41.50 in | 24 | 2.38 in |
| 36 | 47.75 in | 5.75 in | 39.75 in | 9.56 in | 38.12 in | 0.56 in | 36.00 in | Specified by purchaser | 1340 lb | 43.50 in | 28 | 2.38 in |