Attention
To ensure long-term operation of the swivel 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 is used in the anchor handling arrangements of ships and floating facilities. It is one of the anchor shot components and is manufactured by hot stamping. The swivel corrects chain twisting and ensures its smooth stowing into the chain locker.
To ensure long-term operation of the swivel 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
1 – carbon steel;
2 – alloy steel;
3 – alloy steel with additional heat treatment.
External coating
BIT – bitumen paint, 1 layer, ISO 12944-5
Standard
ISO 1704
Strength characteristics meet Class Rules including IACS design, construction and operation standards.
| Chain grade | 1 | 1 | 2 | 3 |
|---|---|---|---|---|
| Ultimate tensile strength, MPa, not less than | 300–400 | 400–490 | 490–690 | 690 |
| Contraction at break, %, not less than | – | – | – | 40 |
| Elongation at break, %, not less than | 30 | 25 | 22 | 17 |
| Impact energy KV, J, not less than | – | – | 47 | 60 |
| Impact bending test temperature, °C | – | – | 0 | 0 |
Olga Sharonova
