Contact Info
- Tel: +86-311-87813582
- Fax: +86-311-87829648
- Email: Kaiwork@126.com
- Whatsapp: +86 86 138 3318 2035
- Add: No.345, Youyi North Street, Shijiazhuang City, Hebei Province, China.
Utility-Grade Lightning & Grounding Protection. Engineered in strict compliance with ASTM A855 specifications, our 95% zinc - 5% aluminum alloy coated (Galfan) steel strand overhead ground wire (OGW) combines high mechanical tensile strength with superior atmospheric corrosion defense, delivering ultimate lightning strike protection and extended operational lifecycles for high-voltage transmission networks.
​ASTM A855 Galfan Steel Strand OGW | High Corrosion-Resistant Overhead Ground Wire
​Designed for critical high-voltage transmission line shielding and grounding under rigorous ASTM design codes. Every coil adheres to strict mechanical and alloy-coating benchmarks.
|
Technical Parameter |
Specification Value |
Governing Standard |
|
Specification & Coating |
ASTM A855 (95% Zinc - 5% Aluminum-Mischmetal Alloy) |
ASTM A855 / ASTM A475 |
|
Strand Construction |
7-Wire / 19-Wire (High-Density Concentric Lay) |
ASTM A855 / IEC 60888 |
|
Available Diameters |
7.94 mm (5/16") to 15.88 mm (5/8") / Custom Sizes |
ASTM A855 |
|
Specified Tensile Strength |
High Strength (HS) / Extra High Strength (EHS) |
ASTM A855 / ISO 6892 |
|
Coating Mass & Adhesion |
Heavy-Duty Galfan Alloy Layer (Superior Adhesion) |
ASTM A855 / ISO 7989 |
|
Surface Condition |
Uniformly Alloy-Coated, Smooth, Stress-Relieved |
Corrosion-Inhibited Free |
· ​ASTM A855 Galfan Certified Performance: Manufactured strictly to meet the mechanical and alloy-coating requirements of ASTM A855, ensuring optimal electrical conductivity and mechanical stability for overhead transmission shields.
· ​2x to 3x Extended Corrosion Resistance: The Eutectic 95% zinc and 5% aluminum-mischmetal alloy coating provides exceptional defense against industrial pollution, acid rain, and coastal salt spray compared to conventional galvanization.
· ​Superior Lightning Strike & Thermal Resilience: Engineered to withstand severe lightning surge currents and thermal shocks without degradation of the protective alloy barrier or loss of mechanical tension.
· ​Full Metallurgical Traceability: Manufactured under stringent ISO 9001 protocols. Each commercial shipment includes a comprehensive Mill Test Certificate (MTC) verifying tensile strength, breaking load, and alloy coating mass.
​Engineered for critical overhead protection across high-voltage electrical power transmission systems:
· ​High-Voltage Power Transmission Lines: Overhead ground wire (OGW) / shield wire / static wire strung at the apex of transmission towers to intercept direct lightning strikes.
· ​Substation & Power Grid Shielding: Perimeter lightning protection spans and overhead grounding grids for electrical substations.
· ​Coastal & Heavy Industrial Corridors: Transmission lines routed through aggressive marine or chemical environments requiring maximum anti-corrosion protection.
​Q: What is the primary function of an Overhead Ground Wire (OGW)?
A: OGW (also known as static wire or shield wire) is installed above the phase conductors of transmission lines to intercept lightning strikes, protecting the power grid from direct surges and providing an alternative fault current path.
​Q: Why is Galfan (ASTM A855) preferred over traditional galvanized OGW?
A: ASTM A855 Galfan coating provides significantly enhanced corrosion resistance (typically 2 to 3 times the lifespan of Class A galvanization), reducing maintenance cycles and replacement costs in corrosive environments.
​Q: What is the standard export packaging and transport safety?
A: Coils are securely wound on robust wooden reels, wrapped in heavy-duty moisture-proof materials, and strapped to prevent any mechanical damage or white rust during international transit.
