Mooring Chain Specs: chain
R3 studlink 76 to R4 studless 122
Offshore mooring and anchor chain specifications per IACS UR W22 (studless) and IACS UR W7 (studlink). Chain grades R3, R3S, R4, R4S, R5 with nominal diameters 16–162 mm. Properties: minimum breaking load (MBL) in kN, proof load in kN, weight per unit length in kg/m, link length and width in mm, Young's modulus in GPa. Also includes wire rope (6×19, 6×37, spiral strand) and polyester rope (3-strand, braided) entries for taut-leg mooring system comparison per API RP 2SK.
| mooring component | record id | elongation modulus GPa (GPa) | grade | link length mm (mm) | link thickness mm (mm) | link type | link width mm (mm) | mbl kN (kN) | nominal diameter mm (mm) | proof load kN (kN) | weight kg m (kg/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| chain | R3 studlink 76 | 64 | R3 | 456 | 76 | studlink | 274 | 1,902 | 76 | 1,331 | 126.1 |
| chain | R3 studlink 92 | 64 | R3 | 552 | 92 | studlink | 331 | 2,731 | 92 | 1,912 | 185.2 |
| chain | R4S studless 107 | 77 | R4S | 642 | 107 | studless | 358 | 4,887 | 107 | 3,519 | 227.5 |
| chain | R4S studless 122 | 77 | R4S | 732 | 122 | studless | 409 | 6,262 | 122 | 4,508 | 296.5 |
| chain | R4S studless 137 | 77 | R4S | 822 | 137 | studless | 459 | 7,796 | 137 | 5,613 | 374.6 |
| chain | R4S studless 162 | 77 | R4S | 972 | 162 | studless | 543 | 10,736 | 162 | 7,730 | 523.2 |
| chain | R4S studless 76 | 77 | R4S | 456 | 76 | studless | 255 | 2,564 | 76 | 1,846 | 114.6 |
| chain | R4S studless 92 | 77 | R4S | 552 | 92 | studless | 308 | 3,681 | 92 | 2,650 | 168.1 |
| chain | R4 studless 107 | 77 | R4 | 642 | 107 | studless | 358 | 4,629 | 107 | 3,333 | 227.5 |
| chain | R4 studless 122 | 77 | R4 | 732 | 122 | studless | 409 | 5,929 | 122 | 4,269 | 296.5 |
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