ASME B16.47 — Series B Class 300 (mm)
ASME B16.47 Series B 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 | 865 | 87.4 | 87.4 | 702 | 665.2 | 143 | 737 | 803.3 | 32 | 34.9 | 1¼" |
| 28" | 700 | 920 | 87.4 | 87.4 | 756 | 716 | 148 | 787 | 857.2 | 36 | 34.9 | 1¼" |
| 30" | 750 | 990 | 92.1 | 92.1 | 813 | 768.4 | 156 | 845 | 920.8 | 36 | 38.1 | 1⅜" |
| 32" | 800 | 1055 | 101.6 | 101.6 | 864 | 819.2 | 167 | 902 | 977.9 | 32 | 41.3 | 1½" |
| 34" | 850 | 1110 | 101.6 | 101.6 | 918 | 870 | 171 | 953 | 1031.9 | 36 | 41.3 | 1½" |
| 36" | 900 | 1170 | 101.6 | 101.6 | 965 | 920.8 | 179 | 1010 | 1089 | 32 | 44.5 | 1⅝" |
| 38" | 950 | 1220 | 109.6 | 109.6 | 1016 | 971.6 | 190 | 1060 | 1139.8 | 36 | 44.5 | 1⅝" |
| 40" | 1000 | 1275 | 114.3 | 114.3 | 1067 | 1022.4 | 197 | 1114 | 1190.6 | 40 | 44.5 | 1⅝" |
| 42" | 1050 | 1335 | 117.5 | 117.5 | 1118 | 1074.7 | 203 | 1168 | 1244.6 | 36 | 47.6 | 1¾" |
| 44" | 1100 | 1385 | 125.5 | 125.5 | 1173 | 1125.5 | 213 | 1219 | 1295.4 | 40 | 47.6 | 1¾" |
| 46" | 1150 | 1460 | 127 | 128.6 | 1229 | 1176.3 | 221 | 1270 | 1365.2 | 36 | 50.8 | 1⅞" |
| 48" | 1200 | 1510 | 127 | 133.4 | 1278 | 1227.1 | 222 | 1327 | 1416 | 40 | 50.8 | 1⅞" |
| 50" | 1250 | 1560 | 136.6 | 138.2 | 1330 | 1277.9 | 233 | 1378 | 1466.8 | 44 | 50.8 | 1⅞" |
| 52" | 1300 | 1615 | 141.3 | 142.6 | 1383 | 1328.7 | 241 | 1429 | 1517.6 | 48 | 50.8 | 1⅞" |
| 54" | 1350 | 1675 | 135 | 147.7 | 1435 | 1379.5 | 238 | 1480 | 1578 | 48 | 50.8 | 1⅞" |
| 56" | 1400 | 1765 | 152.4 | 155.4 | 1494 | 1430.3 | 267 | 1537 | 1651 | 36 | 60.3 | 2¼" |
| 58" | 1450 | 1825 | 152.4 | 160.4 | 1548 | 1481.1 | 273 | 1594 | 1712.9 | 40 | 60.3 | 2¼" |
| 60" | 1500 | 1880 | 149.3 | 165.1 | 1599 | 1531.9 | 270 | 1651 | 1763.7 | 40 | 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.
- Bolt holes are tabulated in inches in the standard; millimetre values are direct conversions.
- Some dimensions do not increase uniformly with size (for example Class 300 thickness at NPS 54" and 60"). This follows the standard.