Mooring Chain Specs: chain
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) | notes | proof load kN (kN) | weight kg m (kg/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| chain | R3S_studless_107 | 77 | R3S | 642 | 107 | studless | 358 | 3,983 | 107 | IACS UR W22 Grade R3S studless | 2,788 | 227.5 |
| chain | R3S_studless_122 | 77 | R3S | 732 | 122 | studless | 409 | 5,102 | 122 | IACS UR W22 Grade R3S studless | 3,571 | 296.5 |
| chain | R3S_studless_137 | 77 | R3S | 822 | 137 | studless | 459 | 6,353 | 137 | IACS UR W22 Grade R3S studless | 4,447 | 374.6 |
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