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duplex wire rope clip
Weifeng/Oem
duplex wire rope clip
The 304 Stainless Duplex Wire Rope Clip for Cables is a premium fastening solution designed to secure wire ropes in high-stress, high-corrosion environments. Crafted from a combination of 304 stainless steel and duplex stainless steel, this clip merges the corrosion resistance of austenitic stainless steel with the strength of duplex alloys, creating a versatile component for critical applications. Compliant with EN 13411-5—the European standard for wire rope fittings—this clip ensures consistent performance in marine, industrial, and outdoor settings where failure is not an option.
Unlike standard wire rope clips, which often sacrifice strength for corrosion resistance or vice versa, this duplex design offers a balanced solution. It is engineered to maintain grip under tension, prevent rope slippage, and withstand harsh environmental conditions, making it a preferred choice for engineers and contractors in demanding industries.
Parameter | Value |
Material | 304 stainless steel (tensile strength: 515 MPa) or duplex stainless steel (620 MPa) |
Working Temperature | -40°C to +280°C (duplex stainless steel) |
Load Capacity | 80% of wire rope’s minimum breaking load (EN 13411-5 compliant) |
Wire Rope Diameter | 6–52 mm |
Finish | Polished or passivated (salt spray test: 1,000+ hours) |
Safety Factor | 5:1 (ultimate load capacity) |
304 stainless steel, composed of 18% chromium and 8% nickel, forms a passive oxide layer that resists rust and chemical attack, making it ideal for freshwater and mild industrial environments. For more demanding conditions, the duplex stainless steel variant—containing 22% chromium, 5% nickel, and 3% molybdenum—offers enhanced resistance to chloride-induced corrosion, a common issue in marine and coastal applications. Both materials undergo passivation, a chemical treatment that removes free iron from the surface, further boosting corrosion resistance. Salt spray testing confirms their durability, withstanding 1,000+ hours without significant corrosion.
The clip’s broad saddle design is engineered to distribute load evenly across the wire rope’s surface, preventing localized stress that can cause rope deformation or failure. 304 stainless steel provides a tensile strength of 515 MPa, while duplex stainless steel increases this to 620 MPa, making it suitable for heavy-duty applications. The U-bolt is precision-forged to ensure uniform thickness, eliminating weak points that could compromise strength under tension.
The two-piece design—consisting of a saddle and U-bolt with nuts—allows for quick installation and adjustment. During assembly, the saddle is placed under the rope, and the U-bolt is positioned over it, with nuts tightened to the specified torque. This configuration ensures optimal clamping force, with the ability to re-tighten if needed after initial load application. The smooth threads on the U-bolt reduce friction during adjustment, preventing galling and ensuring a secure fit.
Beyond corrosion resistance, the materials and design contribute to exceptional longevity. The passivated finish reduces oxidation, while the robust construction withstands abrasion from rope movement. In marine applications, where constant submersion and wave action are common, the duplex variant has demonstrated service lives of 10+ years without performance degradation. This longevity reduces maintenance frequency and replacement costs, making it a cost-effective solution over time.
Compliance with EN 13411-5 ensures the clip meets strict standards for proof load, ultimate strength, and dimensional accuracy. The 5:1 safety factor—meaning the clip can withstand five times its rated load before failure—provides a critical margin of safety in applications where unexpected loads are possible. Each clip is visually inspected and load-tested during manufacturing to ensure it meets these standards.
Marine Industry: Shipyards use these clips to secure mooring lines to docks, ensuring vessels remain stationary during loading and unloading. Offshore platforms rely on them to anchor rigging systems, withstanding saltwater exposure and extreme weather. Fishing vessels employ them to fasten trawl nets and fishing lines, enduring constant submersion and abrasion.
Construction: Suspension bridges use these clips to tension support cables, distributing weight across the structure and ensuring stability under traffic loads. Stadiums and arenas employ them in roof cable systems, securing lightweight yet strong membranes that cover seating areas.
Mining: Underground mines use these clips to anchor conveyor belts and haulage ropes, which transport ore and equipment through tunnels. Their high strength and corrosion resistance make them suitable for damp, dusty mine environments.
Renewable Energy: Wind turbines use guy wires secured with these clips to stabilize towers, withstanding high winds and temperature extremes. Solar farms employ them in tracking systems, securing cables that adjust panel angles for optimal sunlight exposure.
Automotive: Heavy-duty trucks use these clips to secure cargo nets and towing cables, ensuring loads remain stable during transport. Off-road vehicles employ them in winch systems, providing reliable rope fastening during recovery operations.
In a recent offshore wind farm project, duplex stainless steel clips were used to secure guy wires on turbine towers. Exposed to saltwater, high winds, and temperature swings from -40°C to +30°C, the clips maintained their grip and corrosion resistance after three years of operation, contributing to the turbines’ reliable performance.
| DUPLEX CLIP | |||||||||
| SIZE | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | Bolt (mm) | Package (Pcs/Bag) | Approx.Weight (Kg/1000Pcs) |
| 2mm | 30.00 | 12.00 | 7.00 | 1.00 | 5.00 | 15.00 | M4x13 | 100.00 | 8.50 |
| 3mm | 34.00 | 15.00 | 9.00 | 1.00 | 6.00 | 16.00 | M4x13 | 100.00 | 11.20 |
| 4mm | 40.00 | 19.00 | 12.00 | 1.50 | 6.00 | 20.00 | M5x17 | 100.00 | 20.20 |
| 5mm | 50.00 | 20.00 | 14.00 | 1.50 | 8.00 | 25.00 | M5x17 | 100.00 | 27.30 |
| 6mm | 60.00 | 25.00 | 17.00 | 2.00 | 9.50 | 30.00 | M6x22 | 50.00 | 51.20 |
| 8mm | 75.00 | 31.00 | 23.00 | 2.00 | 10.00 | 38.00 | M8x29 | 20.00 | 91.10 |
| 10mm | 96.00 | 38.00 | 27.00 | 2.50 | 14.00 | 48.00 | M10x31 | 20.00 | 180.20 |
