220kV-500kV High-Voltage Steel Lattice Transmission Tower
IEC 60826 compliant heavy-duty infrastructure for national grid applications
Isometric Technical Drawing • AutoCAD Compatible
Engineered for Grid Reliability
With 23 years of manufacturing excellence and a workforce of 1,000 skilled technicians, Xytower delivers transmission infrastructure engineered to meet the demanding specifications of China Southern Power Grid and international standards. Our 220kV-500kV lattice towers are manufactured using Q345B/Q420B high-strength structural steel with complete hot-dip galvanization per ASTM A123/ISO 1461 standards.
Designed for rapid field assembly, our bolted connection systems eliminate on-site welding requirements while ensuring structural integrity. The modular design enables efficient containerized shipping to overseas markets, reducing logistics costs for Southeast Asian grid projects in Malaysia, Myanmar, and Thailand.
- Triple-layer anti-corrosion protection for tropical climates
- Pre-drilled precision manufacturing (±2mm tolerance)
- Seismic Zone IV compliant (0.4g acceleration)
- Wind load resistance: 45m/s (100 mph) basic wind speed
ISO 9001 Certified Facility
Technical Specifications
Comprehensive engineering data for transmission infrastructure planning and procurement
| Voltage Class | Height Range | Base Dimensions | Top Diameter | Circuits | Ground Wire |
|---|---|---|---|---|---|
| 220kV | 24m-45m (79-148 ft) | 6.0m-8.5m (20-28 ft) | 0.6m-0.8m (2.0-2.6 ft) | Single/Double | 1-2 Peaks |
| 330kV | 35m-58m (115-190 ft) | 7.5m-10.5m (25-34 ft) | 0.7m-1.0m (2.3-3.3 ft) | Double | 2 Peaks |
| 500kV | 45m-80m (148-262 ft) | 9.0m-14.0m (30-46 ft) | 0.8m-1.2m (2.6-3.9 ft) | Double/Quad | 2 Peaks |
| Component | Steel Grade | Standard | Yield Strength | Tensile Strength |
|---|---|---|---|---|
| Main Legs | Q420B / Q460C | GB/T 1591 | ≥420 MPa (61 ksi) | 520-680 MPa |
| Bracing | Q345B | GB/T 1591 | ≥345 MPa (50 ksi) | 470-630 MPa |
| Connecting Bolts | 8.8 / 10.9 Grade | GB/T 3098.1 | 640-900 MPa | 800-1000 MPa |
| Welding | E50 Series | AWS D1.1 / GB/T 2694 | 100% Ultrasonic Tested | |
| Load Parameter | Standard Design | Extended Design | Reference Standard |
|---|---|---|---|
| Design Wind Speed | 30 m/s (67 mph) | 45 m/s (100 mph) | IEC 60826:2017 |
| Ice Loading | 0-10 mm | 10-30 mm | ASCE 48-19 |
| Temperature Range | -20°C to +50°C | -40°C to +60°C | GB/T 2694-2018 |
| Maintenance Load | 150 kg (330 lb) | 200 kg (440 lb) | IEC 60826 |
| Seismic Acceleration | 0.2g | 0.4g (Zone IV) | GB 50011 |
| Component Type | Coating Thickness | Adhesion Test | Salt Spray Resistance |
|---|---|---|---|
| Structural Steel (>6mm) | ≥86 μm (3.4 mils) | Pass (Hammer/Impact) | 1000+ Hours |
| Bolts & Hardware | ≥65 μm (2.6 mils) | Pass (Mandrel) | 800+ Hours |
| Threaded Parts | ≥50 μm (2.0 mils) | Pass (File Test) | 500+ Hours |
| Standard Compliance | ASTM A123/A123M • ISO 1461 • GB/T 2694 | ||
| 220kV: 24-45m height, 6-8.5m base |
| 330kV: 35-58m height, 7.5-10.5m base |
| 500kV: 45-80m height, 9-14m base |
| Main Legs: Q420B/Q460C (≥420 MPa) |
| Bracing: Q345B (≥345 MPa) |
| Bolts: Grade 8.8/10.9 |
| Wind Speed: 30-45 m/s |
| Ice Loading: 0-30 mm |
| Seismic: 0.2g-0.4g |
| Structural: ≥86 μm |
| Bolts: ≥65 μm |
| Salt Spray: 1000+ hrs |
Engineering Features
Advanced design elements for efficient installation and long-term reliability
Modular Design
Bolted slip-joint connections enable 30% faster field assembly. No welding required on-site, reducing installation costs and timeline.
Climbing Systems
Internal climbing ladders with fall-arrest guides. Anti-climbing protective devices available for security-sensitive installations.
Aviation Safety
Aircraft warning paint schemes (aviation orange/white) and obstruction lighting mounts pre-installed per ICAO standards.
Foundation Adaptability
Compatible with concrete pad, pile, and raft foundations. Custom base plate designs available for challenging soil conditions.
Anti-Theft Security
Security bolts and tamper-resistant hardware options for remote installations. Protected climbing access configurations.
Quality Traceability
Complete material mill certificates and production batch tracking from raw steel to galvanization. Full documentation package.
Applications & Use Cases
Proven solutions for diverse transmission infrastructure requirements
National Grid Backbone
500kV double-circuit trunk lines for state power utilities and interconnected transmission networks.
Rural Electrification
220kV distribution networks extending grid access to remote regions and underserved communities.
Industrial Power Supply
Dedicated transmission for mining operations, manufacturing facilities, and heavy industrial zones.
Cross-Border Interconnectors
International grid connection projects meeting ASEAN Power Grid standards and bilateral agreements.
Manufacturing Standards & Certifications
International compliance for government and utility procurement
Quality Management
Environmental
Chinese Standard
International Design
US Design Standard
Hot-Dip Galvanizing
Quality Assurance Process: Every tower undergoes comprehensive quality control including 100% ultrasonic testing of all welds, torque verification on bolted connections, and pre-assembly trial fits for complex geometries. Material traceability is maintained from mill certificates through galvanization with complete documentation packages provided for each shipment.
Project References
Proven track record across Southeast Asian markets
Malaysia 275kV Grid Expansion
Supply of 150 units double-circuit towers for national grid reinforcement. Completed on schedule for 2022 peak demand.
Myanmar Yangon Power Ring
220kV transmission corridor with enhanced corrosion-resistant coating for coastal humidity conditions.
Thailand Provincial Electrification
Rural grid extension using 115kV/230kV hybrid designs for challenging terrain accessibility.
Technical Downloads
Comprehensive documentation for engineering review and procurement
Require Custom Design?
Xytower's engineering team specializes in adapting standard designs for specific site conditions. Whether you need modified foundation configurations for challenging soil types, enhanced wind load capacity for cyclone-prone regions, or custom voltage ratings for specialized applications, our 23 years of OEM/ODM experience ensures successful delivery for government tenders and utility projects.