Standard Models for Steel Wire Ropes for Communication Optical Cables

Steel wire ropes for communication optical cables are available in various constructions, diameters, and materials, often with fiber cores or integrated optical fibers, designed for high strength, low stretch, and corrosion resistance.

Types and Constructions

Steel wire ropes for optical cable applications are typically designed to provide mechanical support, stability, and protection for the optical fibers. Common constructions include:

• 6x19 and 6x37 Class: Improved Plow Steel (IPS) or Extra Improved Plow Steel (EIPS) for high tensile strength and durability .
• 7x7, 7x19, 6x19, 6x37, 18x7: These constructions vary in flexibility, load-bearing capacity, and resistance to fatigue .
• Full Lock Coil (FLC) with Fiber Optics: Features densely compacted metallic cross-sections with interlocking “Z”-shaped layers for smooth rolling, low fatigue, and integrated optical fibers .
• Fiber Core or IWRC (Independent Wire Rope Core): Fiber cores provide flexibility and cushioning for optical cables, while IWRC cores enhance strength and stability .

Materials

Steel wire ropes for communication cables are manufactured from:

• Galvanized steel: Provides corrosion resistance for outdoor installations .
• Stainless steel (T304, T316): Offers high corrosion resistance in harsh environments .
• Special alloys: Tungsten, Nitinol, or copper-coated wires for specific applications .
• Coated or oiled ropes: To reduce wear and extend service life .

Diameters and Sizes

Wire ropes are available in a wide range of diameters to suit different load and installation requirements:

• Miniature ropes: 0.075 mm to 8 mm for fine applications .
• Standard ropes: 1 mm to 16 mm, with sheathed or unsheathed options .
• Cord products: 0.8 mm to 10 mm for metallic coated wire applications .

Mechanical Properties

Key specifications include:

• Breaking load / tensile strength: Defined by rope construction, material, and diameter .
• Stretch and elongation: Low-stretch ropes are preferred for optical cable support to prevent fiber damage .
• Fatigue resistance: Smooth rolling and compacted designs reduce wear at sheaves and pulleys .
• Wire torsion and lay length: Ensures stability and prevents rotation under load .

Standards and Compliance

Steel wire ropes for optical cables comply with international standards:

• ASTM A1023/A1023M: Covers carbon steel wire ropes, including stranded ropes, cord products, and mechanical property requirements .
• DIN EN 13414-1 and 13414-2: European standards for galvanized wire ropes, including eyelets, hooks, and sheathed options .
• Custom specifications: Many manufacturers offer bespoke designs for specific optical cable applications, including sacrificial coatings, parallel cores, and integrated fiber optics .

Applications

These wire ropes are used in:

• Aerial optical cable installations: Supporting fiber optic cables on poles or towers.
• Data and communication networks: Providing mechanical protection and tensioning for long-distance fiber runs.
• Specialized industrial applications: Where high strength, low stretch, and corrosion resistance are critical.

Summary

Steel wire ropes for communication optical cables are engineered for strength, stability, and protection, with options including fiber cores, IWRC cores, galvanized or stainless steel, and integrated optical fibers. They are available in various diameters and constructions, meeting ASTM and DIN/EN standards, and can be customized for specific environmental and mechanical requirements .