Stud Anchor Chain

Stud Link Anchor Chain

The Stud Link Anchor Chain is the industry-standard mooring chain designed for the most demanding marine and offshore applications. As an exceptional marine chain, its stud link design provides superior strength, prevents link deformation under extreme load, and ensures smooth handling through a windlass gypsy. This offshore chain is the trusted choice for securing a wide range of floating equipment in harsh environments worldwide.

Engineered for reliability and longevity, our stud link mooring chain is used extensively for:

• Oil Rigs and Drilling Platforms: Providing secure station-keeping in deep water.

• Ships and Vessels: Forming the critical connection between the anchor and the vessel for all commercial and naval fleets.

• Mooring Buoys: Serving as the permanent ground tackle for navigation aids and floating terminals.

Available in Grade 2 and Grade 3 steel, our chains are manufactured to the highest international standards, ensuring they meet the rigorous proof and breaking load requirements for safe and dependable operation. We offer a comprehensive range of sizes, from 5/8 inch (16mm) up to 4 inches (102mm) wire diameter, to suit vessels and structures of all classes.

Key Features & Benefits:

• ✔ Superior Strength & Reliability: The stud link chain design incorporates a solid stud across each link, which significantly increases the chain’s overall strength and resistance to deformation under tensile load.

• ✔ Grade 2 & Grade 3 Options: Available in Grade 2 for standard commercial applications and higher-strength Grade 3 for heavy-duty operations and larger vessels, offering proven proof and breaking loads.

• ✔ Versatile Applications: Ideal for use as mooring chain for floating equipment, including oil rigs, ships, and mooring buoys, as well as for anchoring systems.

• ✔ Precise Engineering: Manufactured to exacting dimensional tolerances (Dimensions A, B, C) to ensure compatibility with standard windlasses, chain stoppers, and other fittings.

• ✔ Global Compliance: Designed to meet the requirements of major classification societies, ensuring acceptance worldwide.

Detailed Specifications: Stud Link Anchor Chain

Below are the comprehensive specifications for our range of stud link anchor chains. Dimensions are in inches and millimeters for global reference. Loads are in pounds (lbs) and the number of links is based on a standard 90-foot (27.4-meter) shackle length.

*(Note: Dimensions: A = Link Length Overall, B = Link Width Overall, C = Length of 5 Links)*

Frequently Asked Questions (FAQs)

Q1: What is the purpose of the “stud” in a stud link anchor chain?
A: The stud is a critical component that serves two main purposes. First, it prevents the link from deforming (collapsing or twisting) under the immense tensile load experienced during anchoring and mooring. Second, it helps the chain handle smoothly through the windlass gypsy, reducing the risk of jamming. This makes stud link chain significantly stronger and more reliable than studless chain of the same diameter.

Q2: What is the difference between Grade 2 and Grade 3 mooring chain?
A: The difference lies in the steel’s tensile strength. Grade 3 chain is manufactured from higher tensile steel than Grade 2 chain. As shown in the load table, a Grade 3 chain of the same diameter has significantly higher proof and breaking loads (approximately 30-40% stronger). Grade 3 is typically specified for larger vessels, deeper water moorings, and more demanding offshore applications like oil rigs.

Q3: What does “Proof Load” and “Break Load” mean?
A: Proof Load is the tension applied to a sample of the chain during manufacturing to verify its integrity and quality. The chain must withstand this load without any permanent deformation. Break Load (or Breaking Load) is the calculated minimum tension at which the chain is expected to fail during a destructive test. The safe Working Load Limit (WLL) for the chain in service is a fraction of the Break Load, determined by an appropriate safety factor.

Q4: How long is a standard “shackle” of anchor chain?
A: In the maritime industry, a standard length of anchor chain is called a “shackle.” While the metric standard is 27.5 meters, this table is based on the imperial standard of 90 feet (approximately 27.4 meters) . The “# of Links per 90′” column tells you how many individual links make up one 90-foot shackle for that specific chain size.

Q5: What do the dimensions “A,” “B,” and “C” refer to in the link specifications?
A: These are the key dimensional characteristics of the chain link, critical for ensuring compatibility with windlasses and chain stoppers.

• Dim A (Link Length Overall): The total length of a single link from outside end to outside end.

• Dim B (Link Width Overall): The maximum width of a single link.

• Dim C (Length of 5 Links): The total length of five consecutive links, measured internally. This is a standard industry measurement used for quality control and to verify the chain’s pitch.

Q6: Is this chain suitable for use as a permanent mooring chain for an offshore platform?
A: Yes, this stud link mooring chain is specifically designed for such demanding applications. The larger diameters (e.g., 3 inches and above) and Grade 3 strength make it ideal for use as offshore chain for oil rigs, FPSOs, and permanent mooring buoys, where it must withstand constant tension, dynamic loads, and harsh environmental conditions for years.

Attention please: The description was copied from different cooperating manufacturers. The description may be different with the goods, please check with us when order.

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