High Voltage Power Transmission Towers are fabricated from high-tensile Q345B or Q420 carbon steel to withstand extreme mechanical tension and lateral wind loads exceeding 30m/s. Each structural component undergoes hot-dip galvanization to a thickness of at least 86μm (per ISO 1461), guaranteeing a service life of 50 to 100 years.
Parameter
| Standard Category | Standard Number | Standard Name | Core function |
| Manufacturing core | GB/T 2694-2018 | Technical specifications for the manufacture of power transmission line towers | The core national standards for materials, manufacturing processes, inspection, and packaging of angle steel towers. |
| Design Core | DL/T 5486-2020 | Technical specifications for the structural design of overhead transmission line towers | Design, material selection, calculations, and construction requirements for transmission towers. |
| Construction acceptance | GB 50233-2014 | Construction and Acceptance Specifications for 110kV to 750kV Overhead Transmission Lines | Assembly, bolt tightening, grounding, and other construction requirements. |
| Material Standards | GB/T 700-2006 | Carbon structural steel | Material standards for main components such as Q235B. |
| GB/T 1591-2018 | Low-alloy high-strength structural steel | Main material standards such as Q355B/Q420 | |
| DL/T 284-2012 | Hot-rolled large-sized equal-angle steel is used for power transmission towers. | Large-sized angle steel: dimensions, properties, and testing. | |
| Corrosion protection standards | GB/T 13912-2002 | Technical requirements for hot-dip galvanized coatings on steel components | Parameters such as hot-dip galvanized coating thickness and adhesion. |
| fastener | GB/T 3098.1-2010 | Mechanical properties of fasteners: bolts, screws, and studs | Performance specifications for 4.8/6.8/8.8 grade bolts |
| DL/T 284-2012 | Hot-dip galvanized bolts and nuts for power transmission line poles and fittings. | Galvanizing and mechanical properties of bolts and nuts |
Grid Infrastructure Applications
National Backbone Grids: Supporting ultra-high voltage (UHV) lines that transport bulk electricity from power generation plants to regional metropolitan substations.
Industrial Power Feeds: Providing dedicated high-capacity transmission corridors for energy-intensive sectors such as mining complexes, aluminum smelters, and heavy manufacturing zones.
Difficult Terrain Crossings: Engineered with reinforced tension sections to maintain conductor stability over long spans across rivers, valleys, and mountain ranges.
Renewable Energy Integration: Facilitating the connection of large-scale wind and solar energy farms to the centralized national grid through multi-circuit tower configurations.
Key Components
Conductors
The high-voltage cables that carry the electricity.
Insulators
Devices that prevent electricity from flowing to the tower structure, increasing in length with higher voltages to maintain separation.
Structural Members
The primary posts and secondary braces that provide the tower's overall strength and stiffness.
Our Factory
Hebei Yifeng Steel Structure Co., Ltd. operates a high-capacity manufacturing facility in Jing County equipped with 12 automated CNC angle steel production lines. We maintain a hole positioning accuracy of ±0.5mm, ensuring seamless alignment during on-site assembly. As a direct manufacturer, we offer full customization of tower heights and load capacities based on regional climatic data, providing wholesale partners with competitive factory-direct pricing and reliable lead times for large-scale international tenders.
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