Product Definition and Core Functionality
The Swivel Shackle Type B is a specialized shackle designed with integrated 360-degree free-rotation capabilities. During anchoring or mooring operations, fluctuations in ocean currents and wind direction can subject the anchor chain to torsional stress. Our CSAC Chain Type B Swivel Shackle automatically relieves this torque, ensuring that the chain load remains in constant linear alignment—thereby extending the service life of the entire anchor chain system.
| Nominal Diameter (mm) | Proof Load (kN) | Breaking Load (kN) | Approx. Weight (kg) |
| 22 | 196 | 280 | 6.5 |
| 38 | 565 | 807 | 35.0 |
| 50 | 951 | 1,360 | 68.0 |
| 76 | 2,050 | 2,930 | 215.0 |
| 92 | 2,900 | 4,140 | 385.0 |
| 122 | 4,810 | 6,870 | 890.0 |
In the field of marine engineering, the failure of ancillary components often results in massive economic losses. The Swivel Shackle Type B, provided by Zhoushan Zhongnan Anchor Chain, offers the following distinct advantages:
This product combines the rotational flexibility of a swivel with the secure connection capabilities of a shackle. This compact design reduces the number of connection points, thereby lowering the probability of system failure.
Every Swivel Shackle Type B undergoes rigorous surface treatment—including hot-dip galvanizing or a specialized black bituminous coating—enabling it to withstand the corrosive effects of high-salinity marine environments over extended periods.
Leveraging our patented manufacturing equipment, all CSAC Chain accessories undergo precise quenching and tempering processes, ensuring that our products exhibit exceptional mechanical properties and fatigue resistance under extreme tensile loads.
Our Swivel Shackle Type B is widely utilized in the following sectors:
Anchoring systems for ocean-going cargo vessels and large oil tankers.
Auxiliary connection points for Floating Production, Storage, and Offloading (FPSO) units.
Offshore aquaculture platforms and monitoring buoys.
Case Study: In 2025, we supplied 92mm-specification Swivel Shackles Type B to a large ocean-going salvage vessel. Given the operational environment—characterized by deep waters and complex current patterns—standard connecting components were prone to chain entanglement. Following the adoption of our CSAC Chain products, the vessel’s anchor chain system operated smoothly throughout a continuous six-month deployment, exhibiting absolutely no deformation caused by torsional stress.
Zhoushan Zhongnan Anchor Chain is more than just a manufacturing facility; it is a technology-driven enterprise:
Patent Portfolio: We hold 17 domestic and international patents, including a patent registered in Luxembourg.
Industry-Academia Collaboration: We have established the "Research Institute for Intelligent Control and Optimized Design of High-Strength Marine Cables" in partnership with the Jiangsu University of Science and Technology.
Automated Production: Our proprietary automated welding and forging control systems ensure consistent quality and uniformity across every batch of Swivel Shackles Type B.
We fully understand the critical importance of safety. Every Swivel Shackle Type B leaving our facility can be supplied with authoritative classification society certificates upon request:
CCS, ABS, DNV, BV, LR, NK, KR, RINA, RS
We implement rigorous quality inspection procedures, including chemical composition analysis, tensile testing, cold bend testing, hardness testing, and 100% Magnetic Particle Testing (MT).
Warranty Commitment: We provide a quality warranty valid for 18 months from the date of shipment or 12 months from the date of installation, whichever occurs first.
Technical Guidance: We provide detailed installation manuals to ensure that the Swivel Shackle Type B is correctly installed at the fore or aft end of the anchor chain.
Protective Packaging: Products are packed in heavy-duty wooden crates or steel pallets, featuring internal anti-collision protection to ensure they remain undamaged during long-distance sea transport.
Global Delivery: Leveraging our strategic proximity to the Ningbo-Zhoushan Port, we are able to rapidly deliver CSAC Chain products to major ports worldwide.
Q: What is the difference between a Type B Swivel Shackle and a standard swivel?
A: The Swivel Shackle Type B features a shackle structure at one end, allowing it to connect directly to a chain link or anchor eye; whereas a standard swivel typically features closed rings or eyes at both ends. The Type B design significantly enhances installation convenience.
Q: Do you support customization for special dimensions?
A: Yes. As one of the key strengths of Zhoushan Zhongnan Anchor Chain, we can customize non-standard dimensions to meet your specific tensile strength requirements or spatial constraints.
Samples/Testing: We accommodate on-site random inspections and breaking load tests conducted by third-party agencies (e.g., SGS, BV) at our facility.
Return/Exchange Policy: In the event of product damage caused by manufacturing defects (excluding human error or extreme environmental overloading), we commit to providing a free replacement within the warranty period.
Address
No. 10 Xinhui Road, Zhanmao Street, Putuo District, Zhoushan City, Zhejiang Province, China
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