The R3 Offshore Stud Link Mooring Chain is a high-strength steel chain engineered for the station-keeping of offshore structures including FPSOs, semi-submersible platforms, drilling rigs, and single point mooring (SPM) systems. Manufactured from high-grade alloy steel and engineered to meet stringent class rules, the R3 grade delivers a minimum tensile strength of 690 MPa and yield strength of 410 MPa.
The stud link design features a central crossbar inside each link, significantly improving resistance to deformation and preventing kinking and twisting under heavy loads. Available in diameters from 34mm to 162mm, with black painted finish as standard.
Specification Of R3 Offshore Stud Link Mooring Chain:
| Nominal | ORQ | R3 | R3S |
| Dia | Studlink | Studless | BL (KN) | Studlink | Studless | BL (KN) |
| (mm) | PL (KN) | BL (KN) | PL (KN) | PL (KN) | PL (KN) | PL (KN) |
| 34 | 668 | 1007 | 706 | 745 | 1064 | 859 | 831 | 1188 |
| 36 | 746 | 1124 | 789 | 832 | 1189 | 960 | 928 | 1327 |
| 38 | 828 | 1248 | 876 | 923 | 1319 | 1065 | 1029 | 1473 |
| 40 | 914 | 1376 | 967 | 1019 | 1456 | 1176 | 1136 | 1626 |
| 42 | 999 | 1513 | 1056 | 1114 | 1592 | 1285 | 1242 | 1777 |
| 44 | 1097 | 1654 | 1160 | 1223 | 1748 | 1411 | 1364 | 1951 |
| 46 | 1194 | 1800 | 1263 | 1331 | 1902 | 1535 | 1484 | 2124 |
| 48 | 1295 | 1952 | 1369 | 1443 | 2063 | 1665 | 1610 | 2304 |
| 50 | 1400 | 2110 | 1480 | 1561 | 2230 | 1800 | 1743 | 2490 |
| 52 | 1508 | 2273 | 1594 | 1682 | 2402 | 1939 | 1877 | 2682 |
| 54 | 1620 | 2441 | 1712 | 1806 | 2580 | 2083 | 2017 | 2881 |
| 56 | 1735 | 2615 | 1834 | 1935 | 2764 | 2231 | 2160 | 3086 |
| 58 | 1851 | 2794 | 1960 | 2068 | 2953 | 2383 | 2308 | 3297 |
| 60 | 1976 | 2978 | 2089 | 2203 | 3147 | 2540 | 2460 | 3514 |
| 62 | 2101 | 3166 | 2221 | 2343 | 3347 | 2701 | 2616 | 3737 |
| 64 | 2230 | 3360 | 2357 | 2486 | 3551 | 2867 | 2776 | 3965 |
| 66 | 2361 | 3559 | 2496 | 2633 | 3761 | 3036 | 2940 | 4200 |
| 68 | 2496 | 3762 | 2639 | 2784 | 3976 | 3209 | 3108 | 4440 |
| 70 | 2631 | 3970 | 2785 | 2938 | 4196 | 3387 | 3289 | 4685 |
| 73 | 2847 | 4291 | 3010 | 3175 | 4535 | 3660 | 3545 | 5064 |
| 76 | 3066 | 4621 | 3242 | 3419 | 4884 | 3942 | 3818 | 5454 |
| 78 | 3216 | 4847 | 3400 | 3587 | 5123 | 4135 | 4004 | 5720 |
| 81 | 3446 | 5194 | 3643 | 3843 | 5490 | 4431 | 4291 | 6130 |
| 84 | 3683 | 5550 | 3893 | 4107 | 5866 | 4735 | 4585 | 6550 |
| 87 | 3925 | 5916 | 4149 | 4377 | 6252 | 5046 | 4887 | 6981 |
| 90 | 4173 | 6289 | 4412 | 4653 | 6647 | 5365 | 5196 | 7422 |
| 92 | 4242 | 6544 | 4590 | 4842 | 6916 | 5582 | 5405 | 7722 |
| 95 | 4599 | 6932 | 4862 | 5128 | 7326 | 5913 | 5726 | 8180 |
| 97 | 4774 | 7195 | 5047 | 5323 | 7604 | 6138 | 5943 | 8490 |
| 100 | 5040 | 7596 | 5328 | 5620 | 8028 | 6480 | 6275 | 8964 |
| 102 | 5220 | 7868 | 5519 | 5821 | 8315 | 6712 | 6500 | 9285 |
| 105 | 5495 | 8282 | 5809 | 6128 | 8753 | 7065 | 6842 | 9773 |
| 107 | 5681 | 8561 | 6005 | 6334 | 9048 | 7304 | 7072 | 10103 |
| 111 | 6058 | 9130 | 6401 | 6755 | 9650 | 7789 | 7543 | 10775 |
| 114 | 6346 | 9565 | 6709 | 7077 | 10109 | 8159 | 7901 | 11287 |
| 117 | 6639 | 10005 | 7018 | 7402 | 10574 | 8535 | 8265 | 11807 |
| 120 | 6953 | 10452 | 7331 | 7733 | 11047 | 8916 | 8634 | 12334 |
| 122 | 7135 | 10753 | 7542 | 7956 | 11365 | 9173 | 8883 | 12690 |
| 124 | 7336 | 11057 | 7755 | 8175 | 11688 | 9433 | 9134 | 13048 |
| 127 | 7641 | 11516 | 8078 | 8515 | 12172 | 9825 | 9514 | 13951 |
| 130 | 7950 | 11981 | 8404 | 8858 | 12663 | 10222 | 9898 | 14140 |
| 132 | 8157 | 12294 | 8623 | 9090 | 12994 | 10488 | 10157 | 14509 |
| 137 | 8682 | 13085 | 9178 | 9674 | 13829 | 11163 | 10809 | 15442 |
| 142 | 9214 | 13887 | 9740 | 10268 | 14677 | 11847 | 11472 | 16389 |
| 147 | 9753 | 14670 | 10310 | 10869 | 15536 | 12540 | 12144 | 17348 |
| 152 | 10299 | 15522 | 10887 | 11477 | 16405 | 13242 | 12823 | 18318 |
| 157 | 11126 | 16768 | 11762 | 12090 | 17282 | 13950 | 13508 | 19297 |