Other Pressure Classes
NPS | OD | D | B (WNF) |
B (BLF) |
H | A |
26 | 660.4 | 870 | 66.7 68.3 |
66.7 68.3 |
119 120.6 |
676 |
28 | 711.2 | 925 | 69.9 71.5 |
69.9 71.5 |
124 125.6 |
727 |
30 | 762 | 985 | 73.1 74.7 |
73.1 74.7 |
135 136.6 |
781 |
32 | 812.8 | 1060 | 79.4 81 |
79.4 81 |
143 144.6 |
832 |
34 | 863.6 | 1110 | 81 82.6 |
81 82.6 |
148 149.6 |
883 |
36 | 914.4 | 1170 | 88.9 90.5 |
88.9 90.5 |
156 157.6 |
933 |
38 | 965.2 | 1240 | 85.8 87.4 |
85.8 87.4 |
156 157.6 |
991 |
40 | 1016 | 1290 | 88.9 90.5 |
88.9 90.5 |
162 163.6 |
1041 |
42 | 1066.8 | 1345 | 95.3 96.9 |
95.3 96.9 |
170 171.6 |
1092 |
44 | 1117.6 | 1405 | 100.1 101.7 |
100.1 101.7 |
176 177.6 |
1143 |
46 | 1168.4 | 1455 | 101.6 103.2 |
101.6 103.2 |
184 185.6 |
1197 |
48 | 1219.2 | 1510 | 106.4 108 |
106.4 108 |
191 192.6 |
1248 |
50 | 1270 | 1570 | 109.6 111.2 |
109.6 111.2 |
202 203.6 |
1302 |
52 | 1320.8 | 1625 | 114.3 115.9 |
114.3 115.9 |
208 209.6 |
1353 |
54 | 1371.6 | 1685 | 119.1 120.7 |
119.1 120.7 |
214 215.6 |
1403 |
56 | 1422.4 | 1745 | 122.3 123.9 |
122.3 123.9 |
227 228.6 |
1457 |
58 | 1473.2 | 1805 | 127 128.6 |
127 128.6 |
233 234.6 |
1508 |
60 | 1524 | 1855 | 130.2 131.8 |
130.2 131.8 |
238 239.6 |
1559 |
NPS | G | K | L | No of Bolts |
Stud Bolt Dia x L |
|
26 | 749 | 806.4 | 34.9 | 24 | 1¼ | 222 |
28 | 800 | 863.6 | 34.9 | 28 | 1¼ | 228 |
30 | 857 | 914.4 | 34.9 | 28 | 1¼ | 234 |
32 | 914 | 977.9 | 41.3 | 28 | 1½ | 266 |
34 | 965 | 1028.7 | 41.3 | 32 | 1½ | 266 |
36 | 1022 | 1085.8 | 41.3 | 32 | 1½ | 279 |
38 | 1073 | 1149.4 | 41.3 | 32 | 1½ | 279 |
40 | 1124 | 1200.2 | 41.3 | 36 | 1½ | 279 |
42 | 1194 | 1257.3 | 41.3 | 36 | 1½ | 292 |
44 | 1245 | 1314.4 | 41.3 | 40 | 1½ | 304 |
46 | 1295 | 1365.2 | 41.3 | 40 | 1½ | 304 |
48 | 1359 | 1422.4 | 41.3 | 44 | 1½ | 317 |
50 | 1410 | 1479.6 | 47.6 | 44 | 1¾ | 336 |
52 | 1461 | 1536.7 | 47.6 | 44 | 1¾ | 349 |
54 | 1511 | 1593.8 | 47.6 | 44 | 1¾ | 355 |
56 | 1575 | 1651 | 47.6 | 48 | 1¾ | 361 |
58 | 1626 | 1708.2 | 47.6 | 48 | 1¾ | 374 |
60 | 1676 | 1759 | 47.6 | 52 | 1¾ | 381 |
Indications:
- OD = Diameter at Weld Bevel
- D = Overall Diameter of Flange
- B (WNF) = Minimum Thickness of Welding Neck Flange
- B (BLF) = Minimum Thickness of Blind Flange
- H = Length thru Hub
- A = Diameter at Base of Hub
- G = Outside Diameter of Raised Face
- K = Bolt Circle Diameter
- L = Diameter of Bolt Holes
General notes:
- Dimensions are in millimeters unless otherwise indicated.
- For dimensions "B" and "H" click IMPORTANT.
- Blind flanges ASME B16.47 series A flanges (≥ NPS 26) are MSS SP-44 flanges.
ASME has incorporated the MSS-SP44 specification into B16.47 Series A and the API 605 Specification into B16.47 series B.
These specification include only Welding Neck and Blind Flanges. - Dimensions for Classes 400, 600 and 900 NPS 38 and larger for Series A flanges are the same as for the Series B flanges.
- The length of the Stud Bolt does not include the height of the chamfers (points).