Galvanized Round Pin Chain Shackles G215 Federal Spec RR-C-271D Type IVB Compliant for Industrial Lifting Rigging Mining

Galvanized Round Pin Chain Shackles G215 Federal Spec RR-C-271D Type IVB Compliant for Industrial Lifting Rigging Mining

Product Description:

Material Advantages:

1. **Material Advantages**

- **Strong Material Compatibility Between Body and Pins:** The shackle body is made of forged carbon steel, a material with excellent forgeability and cost-effectiveness. Forging allows for the formation of a stable foundation structure to meet load-bearing requirements. The pins are made of tempered alloy steel. The tempering process achieves an excellent balance between strength and toughness, compensating for the insufficient strength of carbon steel in key load-bearing areas and significantly improving the overall load-bearing capacity of the shackle.

- **Excellent Corrosion Resistance with Galvanized Layer:** The surface is hot-dip galvanized, allowing the zinc layer to adhere tightly to the steel surface, acting as a barrier to isolate the steel from external moisture, acids, alkalis, and other corrosive substances. Even in the damp underground mining environment or the rainy and snowy conditions of outdoor lifting, it effectively resists corrosion, significantly extending the shackle's service life under harsh working conditions and reducing the cost of frequent replacements.

Manufacturing Process:

2. **Production Process**

1. **Raw Material Selection and Pre-treatment**: High-quality carbon steel and alloy steel raw materials meeting strength standards are selected. Oxide scale and impurities on the surface of the raw materials are removed to prevent them from affecting the subsequent forging quality. Simultaneously, the raw materials are cut to obtain billets suitable for the shackle size.

2. **Forging and Shaping**: Through forging processes such as drop forging, high temperature and pressure are applied to the carbon steel billets to shape them into the shackle body. Alloy steel billets are forged into pin shapes. Forging refines the internal grains of the metal, increases material density, enhances structural strength, and prevents breakage during subsequent use.

3. **Quenching and Tempering Treatment**: The forged pins undergo quenching and tempering treatment. Quenching increases the hardness and strength of the pin, while tempering eliminates internal stress generated during quenching, improves toughness, and prevents the pin from becoming brittle and easily broken due to excessive hardness. Simultaneously, the shackle body is also subjected to appropriate heat treatment to ensure stable overall mechanical properties.

4. **Surface Treatment**: The formed and heat-treated shackles undergo hot-dip galvanizing. The shackles are immersed in molten zinc, ensuring a uniform zinc coating. After cooling, a strong galvanized layer forms, completing the corrosion protection process.

5. **Precision Machining and Inspection**: The shackle connections and pin interfaces are precision machined to ensure smooth pin assembly and tight connections. Afterwards, they are tested according to RR-C-271D Type IVB standards, including load testing, to ensure their ultimate strength is not less than 6 times the rated working load. Once qualified, the rated working load and other information are marked before final shipment.

Features:

3. **Product Features**

- **Comprehensive Safety Assurance**: With a safety factor of 6:1, and having undergone fatigue rating testing, it can withstand 20,000 cycles of 1.5 times the rated working load. It is not easily damaged due to fatigue in frequent lifting and repeated stress scenarios. Each shackle is permanently marked with its rated working load, allowing operators to quickly confirm the load range and avoid overloading that could lead to accidents. In addition, some large-tonnage (25 tons and above) shackles are equipped with RFID functionality for easy equipment traceability and management.

- **Strong and Adaptable Connection:** Utilizing a combination of round pins and cotter pins, the design allows for easy insertion of the round pins followed by securing with the cotter pins. This ensures a stable connection, prevents pin detachment during operation, and facilitates quick assembly and disassembly by operators. This structure is highly adaptable to connecting components such as chains, enabling tight connections and making it suitable for linear traction operations.

- **Compliant with High Standards:** Strictly conforming to Federal Standard RR-C-271D Type IVB requirements, some products also meet the impact testing requirements of authoritative organizations such as DNV. Relevant testing and certification certificates can be provided upon request, adapting to industrial scenarios with stringent equipment specifications.

Technical Parameters:

Applications:

4. **Application Areas**

- **Mining Industry**: In mining operations, it can be used to connect mining chains, hoisting equipment, and ore containers, such as in underground or open-pit mines, to lift and transfer ore. It adapts to the dusty, humid, heavy-load, and complex environments of mines, ensuring the safety and stability of ore transportation.

- **Industrial Lifting Sector**: Widely used in lifting operations in factory production lines, ports, construction sites, etc., for connecting slings to heavy objects, such as lifting large machinery, construction steel, containers, and other heavy items. Its high safety factor can meet the linear lifting requirements of various weights.

- **Other Heavy-Duty Operation Scenarios**: In addition to the above scenarios, it can also be used for equipment lifting in the petrochemical industry, and for transferring tracks and large components in railway construction. It is also suitable for heavy machinery traction in agriculture and simple mooring in the shipbuilding industry, where certain connection strength and corrosion resistance are required.

Support and Services:

After-sales consultation: We provide 24/7 customer service to answer customer questions , such as specification selection, usage methods, and maintenance points.

Regular follow-up visits: The manufacturer may conduct regular follow-up visits to customers to understand the usage and collect customer feedback in order to continuously improve product quality and service levels.

Maintenance guidance: The manufacturer or professional organizations will provide customers with maintenance guidance, including regularly checking for deformation, rust, ; applying rust-preventive oil or corrosion inhibitors after cleaning; and lubricating .

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