Chain Swivels are associated fittings for use within stud link anchor chain assemblies, such as swivel forerunner, for connecting the stud link anchor chain to an anchor or in a navigation buoy mooring bridle system. These are index sized to be compatible with each size of stud link anchor chain. The material and heat treatment should be the same as that of the stud link anchor chain that they are fitted to.
Classification: L.R.S; B.V; A.B.S. (other classification available upon request).
Chain diameter range: 14mm – 60mm, generally available in black bitumen coating, although hot dip galvanized finish is also available (larger sizes available upon request).

MANUFACTURING PROCESS
Chains are welded on automatic flash butt welding machines. The weld areas is trimmed all around the weld on specially designed machines to give a smooth weld. Studs are hydraulically pressed  in the link.

HEAT TREATMENT
To ensure required physical properties and homogeneous grain structure, all chain are heat treated in automatic controlled furnaces.

INSPECTION AND TESTING
Proof and Break Load testing of each chain and accessories is carried out on 500 Tonnes capacity Horizontal Testing Machine. Visual link by link inspection and dimensional check up is done after Proof Load Testing.

Magnetic particle test is carried out on forged and machined components to ensure flawless components.

Tensile tests and impact tests are performed on each batch of finished chain and accessories to comply with the requirement of the specifications. Testing is certified by Classification Societies as required by the Customer.

PAINTING AND PACKAGING
Chains and accessories are generally coated with bitumin. If desired these can be supplied in electro zinc plated or Hot dip galvanised condition. Chains are bundled and tied with wire ropes and loose items packed in wooden boxes.

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