Hot-Rolled Q345B 66kV Dual-Circuit Arm Configuration Steel Electric Pole 160km/h Wind Load Rated

Product Overview

The ESP-66kV-DCA-Q345B is a purpose-engineered 66kV sub-transmission pole featuring an integrated dual-circuit arm (DCA) configuration hot-rolled from Q345B steel plate. Certified for 160 km/h wind loading, this 16-meter octagonal tapered pole provides a compact, reliable solution for medium-haul dual-circuit lines in tropical and monsoon wind regions.

Key Features

• Integrated Dual-Circuit Arms: Factory-welded cross-arms eliminate field assembly of separate arm brackets, reducing erection time and ensuring consistent geometry for precise conductor spacing
• Hot-Rolled Q345B Steel: Superior grain structure from hot-rolling process provides enhanced toughness and fatigue resistance compared to cold-formed sections of equivalent thickness
• 160 km/h Wind Certification: Full-scale structural analysis per ASCE 74 and IEC 60826, verified for tropical cyclone regions with 3-second gust wind speeds up to 160 km/h
• Octagonal Tapered Profile: Optimized section modulus distribution with 8-sided geometry offering excellent torsional rigidity for unbalanced conductor tension scenarios
• Galvanized to GB/T 13912: Chinese national standard equivalent to ISO 1461, ensuring uniform zinc coverage on all surfaces including weld zones

Technical Specifications

Applications

Specifically designed for 66kV sub-transmission networks in Southeast Asia, Africa, and South America where tropical wind loading governs structural design. Ideal for utility grid expansion, industrial zone power supply, and interconnection of 66kV substations in high-wind corridors.

Quality Control

DCA weld integrity verified via 100% magnetic particle inspection (MPI) on all structural welds. Arm geometry checked against design jigs with laser alignment to ensure ±2mm positional accuracy at conductor attachment points. Type-tested prototype available for witness testing at our Jiangsu facility.