ASME B16.47 — Series A Class 300 (mm)
ASME B16.47 Series A Class 300 (mm) — 18 sizes.
| NPS | DN | O — Outside dia (mm) | tf — Weld neck (mm) | tf — Blind (mm) | X — Hub dia (mm) | A — Hub at weld (mm) | Y — Length thru hub (mm) | R — Raised face dia (mm) | W — Bolt circle (mm) | Holes — No. | Hole dia — mm (mm) | Bolt — in (in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 26" | 650 | 970 | 77.8 | 82.6 | 721 | 660.4 | 183 | 749 | 876.3 | 28 | 44.5 | 1⅝" |
| 28" | 700 | 1035 | 84.2 | 88.9 | 775 | 711.2 | 195 | 800 | 939.8 | 28 | 44.5 | 1⅝" |
| 30" | 750 | 1090 | 90.5 | 93.7 | 827 | 762 | 208 | 857 | 997 | 28 | 47.6 | 1¾" |
| 32" | 800 | 1150 | 96.9 | 98.5 | 881 | 812.8 | 221 | 914 | 1054.1 | 28 | 50.8 | 1⅞" |
| 34" | 850 | 1205 | 100.1 | 103.2 | 937 | 863.6 | 230 | 965 | 1104.9 | 28 | 50.8 | 1⅞" |
| 36" | 900 | 1270 | 103.2 | 109.6 | 991 | 914.4 | 240 | 1022 | 1168.4 | 32 | 54 | 2" |
| 38" | 950 | 1170 | 106.4 | 106.4 | 994 | 965.2 | 179 | 1029 | 1092.2 | 32 | 41.3 | 1½" |
| 40" | 1000 | 1240 | 112.8 | 112.8 | 1048 | 1016 | 192 | 1086 | 1155.7 | 32 | 44.5 | 1⅝" |
| 42" | 1050 | 1290 | 117.5 | 117.5 | 1099 | 1066.8 | 198 | 1137 | 1206.5 | 32 | 44.5 | 1⅝" |
| 44" | 1100 | 1355 | 122.3 | 122.3 | 1149 | 1117.6 | 205 | 1194 | 1263.6 | 32 | 47.6 | 1¾" |
| 46" | 1150 | 1415 | 127 | 127 | 1203 | 1168.4 | 214 | 1245 | 1320.8 | 28 | 50.8 | 1⅞" |
| 48" | 1200 | 1465 | 131.8 | 131.8 | 1254 | 1219.2 | 222 | 1302 | 1371.6 | 32 | 50.8 | 1⅞" |
| 50" | 1250 | 1530 | 138.2 | 138.2 | 1305 | 1270 | 230 | 1359 | 1428.8 | 32 | 54 | 2" |
| 52" | 1300 | 1580 | 142.9 | 142.9 | 1356 | 1320.8 | 237 | 1410 | 1479.6 | 32 | 54 | 2" |
| 54" | 1350 | 1660 | 150.9 | 150.9 | 1410 | 1371.6 | 251 | 1467 | 1549.4 | 28 | 60.3 | 2¼" |
| 56" | 1400 | 1710 | 152.4 | 152.4 | 1464 | 1422.4 | 259 | 1518 | 1600.2 | 28 | 60.3 | 2¼" |
| 58" | 1450 | 1760 | 157.2 | 157.2 | 1514 | 1473.2 | 265 | 1575 | 1651 | 32 | 60.3 | 2¼" |
| 60" | 1500 | 1810 | 162 | 162 | 1564 | 1524 | 271 | 1626 | 1701.8 | 32 | 60.3 | 2¼" |
- Dimensions are in millimetres unless stated otherwise.
- Thickness and hub length exclude the raised face: 2 mm for Class 150 and 300, 7 mm for Class 600.
- Bolt holes are tabulated in inches in the standard; millimetre values are direct conversions.
- Some dimensions do not increase uniformly with size (Class 300 and 600 become more compact from NPS 38"). This follows the standard.