Attention
To ensure long-term operation of the swivel shackle it is not allowed to expose it to loads not in line with the rotation axis, and to disassemble and assemble it locally without further testing on special test rigs.
The swivel shackle is used in the anchor handling arrangements of ships and floating facilities in Arctic conditions under temperatures down to -50 °C. Chains and accessories in Arctic versions of grades 2W and 3W are made of special alloy steel with subsequent heat treatment.
To ensure long-term operation of the swivel shackle it is not allowed to expose it to loads not in line with the rotation axis, and to disassemble and assemble it locally without further testing on special test rigs.
Materials
2W – alloy steel;
3W – alloy steel with additional heat treatment.
External coating
BIT – bitumen paint, 1 layer, ISO 12944-5
Standard
The product meets Class Rules including IACS design, construction and operation standards.
Operation temperature
-30 °С; -40 °С; -50 °С.
| Chain grade | 2W(-30) | 2W(-40) | 3W(-30) | 3W(-40) | 3W(-50) |
|---|---|---|---|---|---|
| Ultimate tensile strength, MPa, not less than | 490–690 | 490–690 | 690 | 690 | 690 |
| Contraction at break, %, not less than | – | – | 40 | 40 | 40 |
| Elongation at break, %, not less than | 22 | 22 | 17 | 17 | 17 |
| Impact energy KV, J, not less than | 27 | 27 | 35 | 35 | 35 |
| Impact bending test temperature, °C | -30 | -40 | -30 | -40 | -50 |
Olga Sharonova
