| NPS | DN |
Outside Diameter (D) |
Diameter of Bolt Circle (K) |
Diameter of Bolt Hole (L) inches (mm) |
Number of Bolts |
Nominal Diameter of Bolts (Inches) |
Flange Thickness (C3) |
Hub Diameter at weld end (A) |
Hub Radius (min) (r1) |
|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 15 | 121 | 82,6 | 7/8 (22,2) | 4 | 3/4 | 22,2 | 21,3 | 5 |
| 3/4 | 20 | 130 | 88,9 | 7/8 (22,2) | 4 | 3/4 | 25,4 | 26,7 | 5 |
| 1 | 25 | 149 | 101,6 | 1 (25,4) | 4 | 7/8 | 28,6 | 33,4 | 5 |
| 1-1/4 | 32 | 159 | 111,1 | 1 (25,4) | 4 | 7/8 | 28,6 | 42,2 | 5 |
| 1-1/2 | 40 | 178 | 123,8 | 1-1/8 (28,6) | 4 | 1 | 31,8 | 48,3 | 5 |
| 2 | 50 | 216 | 165,1 | 1 (25,4) | 8 | 7/8 | 38,1 | 60,3 | 5 |
| 2-1/2 | 65 | 244 | 190,5 | 1-1/8 (28,6) | 8 | 1 | 41,3 | 73,0 | 5 |
| 3 | 80 | 267 | 203,2 | 1-1/4 (31,8) | 8 | 1-1/8 | 47,6 | 88,9 | 5 |
| 4 | 100 | 311 | 241,3 | 1-3/8 (34,9) | 8 | 1-1/4 | 54,0 | 114,3 | 5 |
| 5 | 125 | 375 | 292,1 | 1-5/8 (41,3) | 8 | 1-1/2 | 73,0 | 141,3 | 6,5 |
| 6 | 150 | 394 | 317,5 | 1-1/2 (38,1) | 12 | 1-3/8 | 82,6 | 168,3 | 6,5 |
| 8 | 200 | 483 | 393,7 | 1-3/4 (44,4) | 12 | 1-5/8 | 92,1 | 219,1 | 6,5 |
| 10 | 250 | 584 | 482,6 | 2 (50,8) | 12 | 1-7/8 | 108,0 | 273,0 | 6,5 |
| 12 | 300 | 673 | 571,5 | 2-1/8 (54,0) | 16 | 2 | 123,8 | 323,9 | 11 |
| 14 | 350 | 749 | 635,0 | 2-3/8 (60,3) | 16 | 2-1/4 | 133,4 | 355,6 | 11 |
| 16 | 400 | 826 | 704,8 | 2-5/8 (66,7) | 16 | 2-1/2 | 146,1 | 406,4 | 11 |
| 18 | 450 | 914 | 774,7 | 2-7/8 (73,0) | 16 | 2-3/4 | 161,9 | 457,2 | 11 |
| 20 | 500 | 984 | 831,8 | 3-1/8 (79,4) | 16 | 3 | 178,0 | 508,0 | 11 |
| 24 | 600 | 1 168 | 990,6 | 3-5/8 (92,0) | 16 | 3-1/2 | 203,0 | 609,6 | 11 |
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