U3 Anchor Chain

U3 Anchor Chain

When the safety of your vessel and the success of your offshore operation depend on absolute reliability, our U3 grade anchor chain delivers the superior strength and unwavering performance required for the most demanding commercial marine applications. Engineered for heavy-duty mooring, towing, and anchoring, this high-tensile chain sets the industry standard for durability and trust.

Manufactured from premium high-tensile CM690 steel bar, our U3 mooring chain is specifically designed to outperform standard alternatives in critical situations. Where conventional chains may show signs of stress or failure, our Grade U3 chain provides an exceptional safety margin, ensuring your vessel remains secure in adverse weather, strong currents, and challenging seabed conditions.

Key Advantages of Our High-Tensile Marine Chain:

• ✔ 30% Greater Strength: Our U3 grade chain offers a minimum 30% higher tensile strength compared to standard U2 chains, providing superior holding power for large commercial vessels and offshore platforms.

• ✔ Certified for Heavy-Duty Applications: Every length of chain is rigorously tested and certified for use in the most strenuous offshore mooring operations, ensuring compliance with global maritime standards.

• ✔ Proven Durability in Harsh Environments: Constructed from CM690 steel, this anchor chain exhibits exceptional resistance to wear, fatigue, and the corrosive effects of saltwater, guaranteeing a long service life.

• ✔ Precise Engineering for Consistent Quality: Our manufacturing process ensures consistent dimensional accuracy and mechanical properties across all diameters, from 12.5mm to 162mm, providing reliable performance link by link.

Ideal for use as offshore platform mooring chain, ship anchor chain, or for towing and rig chain systems, our U3 grade product is the trusted choice for fleet operators, shipyards, and offshore installation managers worldwide.

Technical Specifications

Our U3 anchor chain is manufactured to the highest international standards, offering a complete range of sizes to suit vessels of all classes.

Detailed Chain Dimensions & Performance Data

Select the correct specification for your vessel from our comprehensive range. Below are the proof loads, breaking loads, and weights for our high-strength anchor chain:

Frequently Asked Questions (FAQs)

Q1: What is the practical difference between U2 and U3 grade anchor chain?
A: The primary difference lies in the material strength. U3 grade anchor chain is manufactured from higher tensile steel (like CM690) compared to U2 grade. As highlighted, this results in a chain that is approximately 30% stronger for the same diameter. This means a U3 chain can handle much higher working loads and provides a greater safety factor, making it essential for larger commercial vessels, deep-water moorings, and harsh environment operations where U2 chains might be at risk of failure.

Q2: What do the class certifications (ABS, BV, DNV, etc.) mean for my chain?
A: These certifications (from bodies like ABS, BV, CCS, DNV·GL, KR, LR, NK, RINA, RS) are official guarantees that our marine mooring chain has been manufactured, tested, and inspected according to the strict rules of that specific classification society. When you purchase a chain with these certifications, you have documented proof that it meets the international safety and quality standards required for insured and compliant vessel operations. It is often a mandatory requirement for commercial shipping.

Q3: Can this U3 chain be used for permanent offshore mooring systems?
A: Yes, absolutely. Our CM690 steel chain is ideally suited for permanent offshore mooring systems used by floating platforms (FPSO), drilling rigs, and renewable energy installations. Its high tensile strength and fatigue resistance make it capable of withstanding the constant dynamic loads and corrosive conditions of long-term deployment in deep water.

Q4: What is the purpose of the “Black Bituminous Paint” finish?
A: The black bituminous paint is a standard, cost-effective anti-corrosion coating applied to anchor chain. It provides a protective layer that helps prevent rust formation during storage, transport, and service in marine environments. While it offers excellent initial protection, for chains subject to severe abrasion on the seabed or extreme long-term service, additional corrosion protection measures like galvanizing (which can be discussed for special orders) might be considered.

Q5: How is the chain’s proof load tested?
A: During manufacturing, samples from each batch of chain are subjected to a proof load test in a specialized hydraulic tensile testing machine. The proof load (listed in the table) is a force greater than the chain’s working load limit but less than its breaking point. The chain must withstand this force without any permanent deformation or failure. This test verifies the integrity of the material and the manufacturing process, ensuring every shackle meets the required safety standards.

Q6: What does “CM690 steel” refer to?
A: CM690 is a specific grade of high-tensile steel commonly specified for the manufacture of Grade 3 (U3) anchor chains. The “CM” typically refers to “Chain Making” and the “690” indicates its minimum tensile strength in megapascals (MPa). This specialized steel is formulated for excellent weldability and toughness, essential for creating reliable, high-strength stud link or studless chain links.

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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