Marine Anchor Chain / Swivel Shackle for Bower Anchors
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Marine anchor chain / swivel shackle for bower anchors
Description:
1. The chain cable is to be as required for the calculated equipment number for the vessel. The anchor cable is to be tested to the test loads corresponding to htose for the required chain cable.
2. Where the vessel may anchor in areas where the current exceeds 2.5m/s, the need to provide a length of heavier chain cable locally between the anchor and the rest of the chain to enhance anchor bedding may be required at the discretion of the Classification Society.
3. For certain restricted services the use of steel wire rope may be accepted in place of chain cable at the discretion of the classification society.
4. Grade of chain cables
 Bower anchors are to be associated with stud link chain cables for one of the grades in Table 3.
Table 3 Grades of chain cables
Â
Material
Grade
Range of UTS Â (N/mm2)
Mild steelÂ
Special quality steel
Extra special quality steelÂ
 1Â
2
3
 300 to 490 (31÷50 kg/mm2)
490 to 690 (50÷70 kg/mm2)
>690 (> 70 kg/mm2)
Â
Proof and breaking loads of stud link chain cables
The design and / or standard breaking loads BL and load PL(expressed in KN) of stud link chain cables are given in Table 4 being d the chain diameter(mm).Â
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