Grade R3-R3S Studless Offshore Mooring Chain

The CSAC Chain Grade R3-R3S Studless Offshore Mooring Chain is specifically designed for deepwater oil and gas platforms, FPSOs, and floating wind systems. It reduces overall system weight while maintaining high breaking loads and excellent fatigue performance, making it suitable for extreme offshore conditions.

Product Description

1. Technical Background & Applications

In harsh marine environments, the stability of mooring systems is critical for offshore asset safety. Our Grade R3-R3S Studless Offshore Mooring Chain features a studless design, reducing stress concentration at link connections. Compared to traditional stud chains, this design improves fatigue resistance over prolonged immersion and facilitates smooth passage through fairleads and windlasses.

• Applicable Fields: FPSO units, semi-submersible drilling platforms, deepwater floating wind farms, single-point mooring systems.
• Core Product: CSAC Chain Grade R3-R3S Studless Offshore Mooring Chain

2. Manufacturing Process & Quality Control

Zhoushan Zhongnan Anchor Chain Co., Ltd. employs advanced flash-butt welding technology and fully automated heat treatment lines. Each Grade R3-R3S Studless Offshore Mooring Chain undergoes rigorous tensile testing, non-destructive testing (UT/MT), and low-temperature impact tests to ensure toughness at temperatures as low as -20°C.

Technical Specifications

The following table summarizes standard specifications for the CSAC Chain Grade R3-R3S Studless Offshore Mooring Chain:

Certification & Quality Assurance

Every CSAC Chain Grade R3-R3S Studless Offshore Mooring Chain is thoroughly inspected to ensure superior performance in extreme marine conditions.

• Authority Certifications: CCS, ABS, DNV, LR, BV, NK, KR, RINA, RS factory approvals and product certificates.
• Manufacturing Standards: ISO 1704, IACS W22, API offshore engineering standards.
• Full Process QC: Material spectral analysis, 100% UT/MT inspection after flash-butt welding, ensuring defect-free chains.

Competitive Advantages

1. Technical Innovation

In collaboration with Jiangsu University of Science and Technology, we established the “Research Institute of High-Strength Marine Cable Intelligent Control Optimal Design,” providing chains with superior fatigue life compared to industry averages.

2. Design Optimization

The studless design eliminates loose crossbars, reduces overall mooring system weight, and improves load efficiency on FPSOs and floating platforms.

3. Manufacturing Strength

Our patented automated welding equipment ensures consistent weld quality for chains ranging from 34 mm to 142 mm in diameter.

After-Sales Service

Technical Support

We assist engineers in mooring system verification and chain selection.

Installation Guidance

Detailed deployment instructions and accessory support including Kenter shackles and swivels are provided.

Regular Follow-Up

We provide wear assessment and maintenance guidance for long-term service of CSAC Chain products to extend operational lifespan.

Packaging & Delivery

Protective Packaging

Chains are coated with high-performance black bitumen or hot-dip galvanized to prevent oxidation during transport and storage.

Logistics Solutions

Leveraging proximity to Ningbo-Zhoushan Port, we provide container, frame, or bulk shipments to ensure on-time delivery of Grade R3-R3S Studless Offshore Mooring Chain to shipyards and offshore projects worldwide.

Product Parameters