INCONEL® encompasses a family of nickel-chromium alloys including INCONEL® X-750. These alloys have high strength, weldability, and corrosion resistance at extreme temperature ranges. Temperatures for various applications can range from -400°F to 1200°F. (Registered trademark of the Special Metals Corporation)
Help eliminate flange leakage with BelleFlex® INCONEL® Belleville washers. Leaks occur by bolt stretch, gasket creep, cycles of thermal change, etc. However, by maintaining load on bolted joints, leakage is greatly reduced, if not eliminated.
The load values listed in the table below are according to the calculated theoretical load curve based on the dimensions and material for each part number.
| Part Number | Bolt Size | OD | ID | THK | DISH | OAH | Spec Flat Load (lbf) | Torque (ft-lb) |
|---|---|---|---|---|---|---|---|---|
| FB1-30-750 | 1/2″ | 1.012 | 0.528 | 0.122 | 0.012 | 0.134 | 4260 | 30 |
| FB1-45-750 | 1/2″ | 1.012 | 0.528 | 0.144 | 0.011 | 0.155 | 6421 | 45 |
| FB1-60-750 | 1/2″ | 1.012 | 0.528 | 0.17 | 0.009 | 0.179 | 8644 | 60 |
| FB2-30-750 | 5/8″ | 1.146 | 0.641 | 0.148 | 0.013 | 0.161 | 6791 | 60 |
| FB2-45-750 | 5/8″ | 1.146 | 0.641 | 0.185 | 0.01 | 0.195 | 10182 | 90 |
| FB2-60-750 | 5/8″ | 1.146 | 0.641 | 0.211 | 0.009 | 0.22 | 13595 | 120 |
| FB3-30-750 | 3/4″ | 1.37 | 0.762 | 0.186 | 0.014 | 0.2 | 10077 | 100 |
| FB3-45-750 | 3/4″ | 1.37 | 0.762 | 0.224 | 0.012 | 0.236 | 15086 | 150 |
| FB3-60-750 | 3/4″ | 1.37 | 0.762 | 0.254 | 0.011 | 0.265 | 20162 | 200 |
| FB4-30-750 | 7/8″ | 1.588 | 0.891 | 0.223 | 0.015 | 0.238 | 13949 | 160 |
| FB4-45-750 | 7/8″ | 1.588 | 0.891 | 0.261 | 0.014 | 0.275 | 20873 | 240 |
| FB4-60-750 | 7/8″ | 1.588 | 0.891 | 0.302 | 0.012 | 0.314 | 27745 | 320 |
| FB5-30-750 | 1″ | 1.807 | 1.023 | 0.245 | 0.019 | 0.264 | 18236 | 245 |
| FB5-45-750 | 1″ | 1.807 | 1.023 | 0.297 | 0.016 | 0.313 | 27356 | 368 |
| FB5-60-750 | 1″ | 1.807 | 1.023 | 0.342 | 0.014 | 0.408 | 36549 | 490 |
| FB6-30-750 | 1-1/8″ | 2.02 | 1.145 | 0.279 | 0.021 | 0.3 | 23844 | 355 |
| FB6-45-750 | 1-1/8″ | 2.02 | 1.145 | 0.342 | 0.017 | 0.359 | 35553 | 533 |
| FB6-60-750 | 1-1/8″ | 2.02 | 1.145 | 0.393 | 0.015 | 0.408 | 47601 | 710 |
| FB7-30-750 | 1-1/4″ | 2.31 | 1.27 | 0.31 | 0.026 | 0.336 | 30190 | 500 |
| FB7-45-750 | 1-1/4″ | 2.31 | 1.27 | 0.38 | 0.021 | 0.401 | 45019 | 750 |
| FB7-60-750 | 1-1/4″ | 2.31 | 1.27 | 0.449 | 0.017 | 0.466 | 60017 | 1000 |
| FB8-30-750 | 1-3/8″ | 2.47 | 1.401 | 0.344 | 0.026 | 0.37 | 37030 | 680 |
| FB8-45-750 | 1-3/8″ | 2.47 | 1.401 | 0.423 | 0.021 | 0.444 | 55609 | 1020 |
| FB8-60-750 | 1-3/8″ | 2.47 | 1.401 | 0.49 | 0.018 | 0.508 | 74092 | 1360 |
| FB9-30-750 | 1-1/2″ | 2.678 | 1.527 | 0.382 | 0.027 | 0.409 | 45005 | 800 |
| FB9-45-750 | 1-1/2″ | 2.678 | 1.527 | 0.468 | 0.022 | 0.49 | 67432 | 1200 |
| FB9-60-750 | 1-1/2″ | 2.678 | 1.527 | 0.541 | 0.019 | 0.56 | 89960 | 1600 |
| FB10-30-750 | 1-5/8″ | 2.948 | 1.648 | 0.415 | 0.031 | 0.446 | 53747 | 1100 |
| FB10-45-750 | 1-5/8″ | 2.948 | 1.648 | 0.51 | 0.025 | 0.535 | 80445 | 1650 |
| FB10-60-750 | 1-5/8″ | 2.948 | 1.648 | 0.585 | 0.022 | 0.607 | 106841 | 2200 |
| FB11-30-750 | 1-3/4″ | 3.168 | 1.776 | 0.448 | 0.033 | 0.481 | 62476 | 1500 |
| FB11-45-750 | 1-3/4″ | 3.168 | 1.776 | 0.55 | 0.027 | 0.577 | 93606 | 2250 |
| FB11-60-750 | 1-3/4″ | 3.168 | 1.776 | 0.637 | 0.023 | 0.66 | 125172 | 3000 |
| FB12-30-750 | 1-7/8″ | 3.392 | 1.902 | 0.483 | 0.035 | 0.518 | 72446 | 2000 |
| FB12-45-750 | 1-7/8″ | 3.392 | 1.902 | 0.589 | 0.029 | 0.618 | 108855 | 3000 |
| FB12-60-750 | 1-7/8″ | 3.392 | 1.902 | 0.624 | 0.027 | 0.651 | 120509 | 4000 |
| FB13-30-750 | 2″ | 3.6 | 2.025 | 0.516 | 0.037 | 0.553 | 83123 | 2200 |
| FB13-45-750 | 2″ | 3.6 | 2.025 | 0.628 | 0.031 | 0.63 | 125014 | 3300 |
| FB13-60-750 | 2″ | 3.6 | 2.025 | 0.672 | 0.028 | 0.7 | 138943 | 4400 |
| FB14-30-750 | 2-1/4″ | 4.04 | 2.282 | 0.551 | 0.041 | 0.592 | 89373 | 3180 |
| FB14-45-750 | 2-1/4″ | 4.04 | 2.282 | 0.72 | 0.033 | 0.753 | 160501 | 4770 |
| FB14-60-750 | 2-1/4″ | 4.04 | 2.282 | 0.753 | 0.032 | 0.785 | 178034 | 6360 |
| FB15-30-750 | 2-1/2″ | 4.482 | 2.53 | 0.654 | 0.045 | 0.699 | 133255 | 4400 |
| FB15-45-750 | 2-1/2″ | 4.482 | 2.53 | 0.8 | 0.037 | 0.837 | 200452 | 6600 |
| FB15-60-750 | 2-1/2″ | 4.482 | 2.53 | 0.81 | 0.04 | 0.85 | 222656 | 8800 |
| FB16-30-750 | 2-3/4″ | 4.919 | 2.777 | 0.695 | 0.056 | 0.751 | 163432 | 5920 |
| FB16-45-750 | 2-3/4″ | 4.919 | 2.777 | 0.849 | 0.046 | 0.895 | 244504 | 8880 |
| FB16-60-750 | 2-3/4″ | 4.919 | 2.777 | 0.934 | 0.038 | 0.972 | 272113 | 11840 |
| FB17-30-750 | 3″ | 5.36 | 3.03 | 0.793 | 0.053 | 0.846 | 195791 | 7720 |
| FB17-45-750 | 3″ | 5.36 | 3.03 | 0.973 | 0.043 | 1.016 | 293430 | 11580 |
| FB17-60-750 | 3″ | 5.36 | 3.03 | 1.024 | 0.041 | 1.065 | 326123 | 15440 |
| FB18-60-750 | 3-1/4″ | 5.4 | 3.29 | 1.108 | 0.036 | 1.144 | 384779 | 19814 |
| FB19-60-750 | 3-1/2″ | 6.135 | 3.53 | 1.202 | 0.045 | 1.247 | 448932 | 24863 |
| FB20-60-750 | 3-3/4″ | 6.67 | 3.825 | 1.288 | 0.05 | 1.338 | 517631 | 30711 |
| FB21-60-750 | 4″ | 7.135 | 4.05 | 1.617 | 0.046 | 1.663 | 815986 | 51698 |
* Torque values for sizes 1-1/8″ and larger are based on the 8-pitch thread series for flanged piping.
† 50,000 psi bolt stress