中文 / EN

About Us

GREENPIN High-Strength Shackles | Heavy-Duty Lifting, Marine Engineering, Trusted Worldwide

Classification:

News

Time：

2026-03-30

As a global benchmark brand in the rigging industry, GREENPIN centers on high-strength materials, multi-layered safety features, and all‑scenario adaptability, delivering reliable connection solutions for heavy‑lift operations, offshore engineering, industrial manufacturing, and more.

I. Core Brand Advantages

GREENPIN shackles leverage a century of accumulated craftsmanship, with safety first, stable performance, and exceptional durability as their core competitive strengths, making them the trusted choice of industrial customers worldwide. Their key advantages are as follows:

Ultimate Safety Assurance: All products in the series adhere to a 6‑times safety factor (5‑times for select heavy‑duty models), with a minimum breaking load (MBL) ≥ 6× the working load limit (WLL)—far exceeding industry standards—providing a robust safety barrier for lifting operations.

International authoritative certification: Fully compliant with EN 13889 and the U.S. RR-C-271 standard, and holding multiple international classification society and quality certifications, including DNV GL, ABS, CE, and ISO, thereby meeting the stringent regulatory requirements of marine and heavy‑industry applications.

Ultra‑durable design: Constructed from high‑strength alloy steel through quenching and tempering, with a hot‑dip galvanized or anti‑corrosion coating on the surface, it offers excellent resistance to corrosion, wear, and impact, and is suitable for extreme operating conditions ranging from –60°C to 200°C.

Innovative Intelligent Configuration: Optional embedded RFID chips enable unique product identification and full‑lifecycle tracking, meeting the demands of industrial digital management.

II. Mainstream Product Lines and Key Specifications

1. Standard Series Shackles (General-Purpose Applications)

Product model	Type	Payload range	Key Features	Applicable Scenarios
G-4161	Spiral Pin D-Shaped Shackle	0.33t - 12t	Compact in design and easy to assemble and disassemble, the helical pin mechanism is optimized for frequent loading and unloading applications.	Equipment moving, warehouse lifting, light‑weight construction projects
G-5163	Bow-Shaped Safety Shackle	0.5t - 85t	Grade 8 high-strength alloy steel, hot-dip galvanized, 55t/85t models with a 6-fold safety factor.	Port terminals, heavy equipment lifting, bridge construction
G-5263	Large-Opening Bow-Shaped Shackle	9.5t - 55t	Extra-large opening design, compatible with thick-diameter wire ropes and wide slings.	Ship lifting, hoisting of large components, and mining material handling

2. Heavy-Duty and Special‑Purpose Series (Designed for High-End Applications)

Product model	Type	Payload range	Key Highlights	Specially adapted
Heavy-duty bow shackle FN	Safety bolt type	120t - 150t	Triple safety protection (cotter pin + safety bolt + lock nut), Nord-Lock anti-loosening washers, suitable for extreme vibration conditions.	Offshore oil platforms, wind turbine installation, and the lifting of ultra-large components
ROV-specific shackle	D-shaped dowel pin	6.5t - 55t	The conical pin tail facilitates underwater assembly, the D‑shaped handle is compatible with ROV manipulators, and it features an anti‑corrosion coating.	Seabed exploration, underwater engineering, and marine scientific research
BigMouth® Large-Opening Shackle	Wide-body arc-shaped	Custom-made on demand	Extra-wide opening significantly improves sling and rigging assembly efficiency and extends the service life of lifting equipment.	Port container handling and positioning of heavy equipment

III. Core Technical Parameters (General Standards)

Parameter Category	Specific specifications
Material	High-strength alloy steel (Grade 6 / Grade 8), quenched and tempered.
Safety factor	Standard type: 6 times (MBL = 6 × WLL), heavy-duty type: 5 times
Operating temperature	-60℃ to 200℃ (some models are compatible with ultra-low temperatures)
Surface treatment	Hot-dip galvanizing, anti-corrosion coating, silver baked paint (heavy-duty type)
Core Certification	EN 13889, RR-C-271, DNV GL, ABS, CE, ISO
Additional Configuration	Optional RFID chips, CAD drawing library, and customized anti-loosening solutions

IV. Full Coverage of Application Scenarios

Heavy‑duty lifting and engineering: bridge construction, steel structure erection, and the handling of large‑scale equipment, tailored to meet high‑tonnage, highly stable lifting requirements.

Ports and Shipping: Container handling, ship repair, and cable splicing—featuring salt‑spray resistance and corrosion‑proof properties tailored to marine environments.

Marine and Oil & Gas: Offshore platform lifting, subsea operations, and pipeline installation, certified by DNV GL and other authorities to meet deep-sea operating conditions.

Industrial Manufacturing and Mining: Mine excavation, hoisting of metallurgical equipment, and heavy‑duty component handling; impact‑resistant, wear‑resistant materials are suited to harsh operating conditions.

V. Key Considerations for Selection and Use

Selection principles: Match the WLL rating to the lifting weight, and select the appropriate model based on the connection type (D‑shackle or bow shackle), operating conditions (temperature, corrosion level), and applicable safety standards. Overloading is strictly prohibited.

Installation specifications: Clean the threads and mating surfaces, ensure adequate thread engagement, tighten to the specified torque using a torque wrench, and verify that rotary shackle-type shackles rotate freely through 360° without binding.

Maintenance recommendations: Regularly inspect the exterior for cracks, deformation, and corrosion; verify thread integrity and the condition of anti-loosening devices. In high-temperature or highly corrosive environments, increase the frequency of inspections and promptly replace worn components.

VI. Brand Commitment

GREENPIN places “safety at the core and quality as the foundation.” Every shackle undergoes rigorous performance testing and is accompanied by a complete set of factory‑issued certificates—including material certifications, test reports, and relevant approval documents. We also provide expert product selection guidance, installation training, and comprehensive lifecycle after‑sales support, delivering safe, efficient, and reliable lifting‑and‑connection solutions to industrial customers worldwide.

NOB Eye Bolts — Experts in Industrial Heavy-Duty Lifting and Safe Connections

How do you select the appropriate bolt grade based on actual requirements?

NOB Eye Bolts — Experts in Industrial Heavy-Duty Lifting and Safe Connections

How do you select the appropriate bolt grade based on actual requirements?