ASME B16.47 — Series A Flanges — Class 400
ASME B16.47 Series A Flanges — Class 400 — 18 sizes.
| Size | Flange OD (O) (mm) | Flange Thickness (WNF) (mm) | Flange Thickness (Blind) (mm) | Length Through Hub (L2) (mm) | Hub Dia (X) (mm) | Hub Dia Top (H) (mm) | Raised Face Dia (R) (mm) | Bolt Circle Dia (mm) | No. of Bolt Holes | Bolt Hole Dia (in) | Bolt Hole Dia (mm) | Bolt Dia (in) | Bolt Dia (mm) | Min. Fillet Radius (r) (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 970 | 88.9 | 98.5 | 194 | 727 | 660.4 | 749 | 876.3 | 28 | 1.88 | 47.63 | 1.75 | 44.45 | 11 |
| 28 | 1035 | 95.3 | 104.8 | 206 | 783 | 711.2 | 800 | 939.8 | 28 | 2 | 50.8 | 1.88 | 47.63 | 13 |
| 30 | 1090 | 101.6 | 111.2 | 219 | 837 | 762 | 857 | 997 | 28 | 2.13 | 53.98 | 2 | 50.8 | 13 |
| 32 | 1150 | 108 | 115.9 | 232 | 889 | 812.8 | 914 | 1054.1 | 28 | 2.13 | 53.98 | 2 | 50.8 | 13 |
| 34 | 1205 | 111.2 | 122.3 | 241 | 945 | 863.6 | 965 | 1104.9 | 28 | 2.13 | 53.98 | 2 | 50.8 | 14 |
| 36 | 1270 | 114.3 | 128.6 | 251 | 1000 | 914.4 | 1022 | 1168.4 | 32 | 2.13 | 53.98 | 2 | 50.8 | 14 |
| 38 | 1205 | 123.9 | 123.9 | 206 | 1003 | 965.2 | 1035 | 1117.6 | 32 | 1.88 | 47.63 | 1.75 | 44.45 | 14 |
| 40 | 1270 | 130.2 | 130.2 | 216 | 1054 | 1016 | 1092 | 1174.8 | 32 | 2 | 50.8 | 1.88 | 47.63 | 14 |
| 42 | 1320 | 133.4 | 133.4 | 224 | 1108 | 1066.8 | 1143 | 1225.6 | 32 | 2 | 50.8 | 1.88 | 47.63 | 14 |
| 44 | 1385 | 139.7 | 139.7 | 233 | 1159 | 1117.6 | 1200 | 1282.7 | 32 | 2.13 | 53.98 | 2 | 50.8 | 14 |
| 46 | 1440 | 146.1 | 146.1 | 244 | 1213 | 1168.4 | 1257 | 1339.8 | 36 | 2.13 | 53.98 | 2 | 50.8 | 14 |
| 48 | 1510 | 152.4 | 152.4 | 257 | 1267 | 1219.2 | 1308 | 1403.4 | 28 | 2.38 | 60.33 | 2.25 | 57.15 | 14 |
| 50 | 1570 | 157.2 | 158.8 | 268 | 1321 | 1270 | 1362 | 1460.5 | 32 | 2.38 | 60.33 | 2.25 | 57.15 | 14 |
| 52 | 1620 | 162 | 163.6 | 276 | 1372 | 1320.8 | 1413 | 1511.3 | 32 | 2.38 | 60.33 | 2.25 | 57.15 | 14 |
| 54 | 1700 | 169.9 | 171.5 | 289 | 1426 | 1371.6 | 1470 | 1581.2 | 28 | 2.63 | 66.68 | 2.5 | 63.5 | 14 |
| 56 | 1755 | 174.7 | 176.3 | 298 | 1480 | 1422.4 | 1527 | 1632 | 32 | 2.63 | 66.68 | 2.5 | 63.5 | 14 |
| 58 | 1805 | 177.8 | 181 | 306 | 1530 | 1473.2 | 1578 | 1682.8 | 32 | 2.63 | 66.68 | 2.5 | 63.5 | 14 |
| 60 | 1885 | 185.8 | 189 | 319 | 1584 | 1524 | 1635 | 1752.6 | 32 | 2.88 | 73.03 | 2.75 | 69.85 | 14 |
- TABLE - 33: DIMENSION OF ANSI B16.47: 2011 — CLASS 400 SERIES A FLANGES
- Dimensions are in millimeters.
- 1. The minimum flange thickness does not include the raised face thickness
- 2. This dimension is for the large end of hub, which mey be straight or tapered
- 3. The bore is to be specified by the purchaser
- 4. Blind flanges may be made with or without hubs at the manufacturer’s option.
- 5. Dimension for Classes 400,600 and 900 NPS 38 and large for series B flanges are the same as for the Series A flanges.
- Thickness symbol is 'C' in this block (T in classes 150/300).