| 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 (C) | Hub Diameter (N) |
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 | 38 | 21,3 | 5 |
| 3/4 | 20 | 130 | 88,9 | 7/8 (22,2) | 4 | 3/4 | 25,4 | 44 | 26,7 | 5 |
| 1 | 25 | 149 | 101,6 | 1 (25,4) | 4 | 7/8 | 28,6 | 52 | 33,4 | 5 |
| 1-1/4 | 32 | 159 | 111,1 | 1 (25,4) | 4 | 7/8 | 28,6 | 64 | 42,2 | 5 |
| 1-1/2 | 40 | 178 | 123,8 | 1-1/8 (28,6) | 4 | 1 | 31,8 | 70 | 48,3 | 5 |
| 2 | 50 | 216 | 165,1 | 1 (25,4) | 8 | 7/8 | 38,1 | 105 | 60,3 | 5 |
| 2-1/2 | 65 | 244 | 190,5 | 1-1/8 (28,6) | 8 | 1 | 41,3 | 124 | 73,0 | 5 |
| 3 | 80 | 241 | 190,5 | 1 (25,4) | 8 | 7/8 | 38,1 | 127 | 88,9 | 3 |
| 4 | 100 | 292 | 235,0 | 1-1/4 (31,8) | 8 | 1-1/8 | 44,4 | 159 | 114,3 | 5 |
| 5 | 125 | 349 | 279,4 | 1-3/8 (34,9) | 8 | 1-1/4 | 50,8 | 190 | 141,3 | 6,5 |
| 6 | 150 | 381 | 317,5 | 1-1/4 (31,8) | 12 | 1-1/8 | 55,6 | 235 | 168,3 | 6,5 |
| 8 | 200 | 470 | 393,7 | 1-1/2 (38,1) | 12 | 1-3/8 | 63,5 | 298 | 219,1 | 6,5 |
| 10 | 250 | 546 | 469,9 | 1-1/2 (38,1) | 16 | 1-3/8 | 69,8 | 368 | 273,0 | 6,5 |
| 12 | 300 | 610 | 533,4 | 1-1/2 (38,1) | 20 | 1-3/8 | 79,4 | 419 | 323,9 | 9,5 |
| 14 | 350 | 641 | 558,8 | 1-5/8 (41,3) | 20 | 1-1/2 | 85,7 | 451 | 355,6 | 11,5 |
| 16 | 400 | 705 | 616,0 | 1-3/4 (44,4) | 20 | 1-5/8 | 88,9 | 508 | 406,4 | 11 |
| 18 | 450 | 787 | 685,8 | 2 (50,8) | 20 | 1-7/8 | 101,6 | 565 | 457,2 | 11 |
| 20 | 500 | 857 | 749,3 | 2-1/8 (54,0) | 20 | 2 | 108,0 | 622 | 508,0 | 11 |
| 24 | 600 | 1 041 | 901,7 | 2-5/8 (66,7) | 20 | 2-1/2 | 139,7 | 749 | 609,6 | 11 |
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