The electric angle steel tower is a steel structure that can keep a certain safe distance between the supporting wire and the ground buildings in the transmission line.
In the 1980s, many countries in the world began to apply steel pipe profiles to iron tower structures when developing UHV transmission lines. Steel pipe towers with steel pipes as the main material have appeared. In Japan, almost all 1000kV UHV lines and towers use steel pipe towers. They conducted in-depth research on the design technology of steel pipe poles.
Drawing on foreign experience, steel pipe profiles have been applied in 500kV double-circuit towers and four-circuit towers with the same tower in my country, showing good performance and benefits. The steel pipe tower structure has been well developed in lines of different voltage levels due to its outstanding advantages such as large section rigidity, good section force characteristics, simple force, and beautiful appearance. Especially in the large-span structure and tower structure of urban power grid, it is widely used.
With the continuous development of my country's metallurgical industry, the production of high-strength steel is no longer difficult. The quality of my country's high-strength structural steel has been improving rapidly and steadily, and the supply channels have become increasingly smooth, which provides the possibility for the use of high-strength steel for transmission line towers. In the preliminary research project of the 750kV transmission line, the Electric Power Construction Research Institute of the State Power Corporation studied the node connection structure, component design parameter values, supporting bolts and economic benefits in the use of high-strength steel. From the perspective of technology and application, high-strength steel It has fully met the conditions for use on the iron tower,
| Height | 5m to 100m or other height customer requirement |
| Suit for | Antenna supporting |
| Shape | Conoid ,Multi-pyramidal,Columniform,polygonal or conical |
| Material | Q345B/A572,minimum yield strength>=355n/mm2 Q235B/A36,minimum yield strength>=235n/mm2 |
| Torlance of the dimenstion | +- 2% |
| Electroshock resistant protective grade | Grade I |
| The casing anti-corrosion performance | Class II |
| Working atmosphere of lighting fixture | -40 ºC~+45 ºC |
| Surface treatment | Hot dip galvanized Following ASTM A 123, color polyester power |
| Joint of Poles | sliping connection |
| Design of pole | Against earthquake of 8 grade |
| Wind Speed | 0-300km/h |
| Minimum yield strength | 335mpa |
| Minimum ultimate tensile strength | 400mpa |
| Max ultimate tensile strength | 620mpa |
| Standard | ISO9001 |
| Length of per section | Within 14m once forming without slip joint |
| Welding | Welding Standard : AWS ( American Welding Society ) D 1.1 |
| Thickness | 1mm to 30mm |
| Production Process | Raw material test → Cuttingj →Molding or bending →Welidng (longitudinal )→Dimension verify →Flange welding →Hole drilling →Calibration → Deburr→Galvanization or powder coating , painting →Recalibration →Thread →Packages |
| Packages | Usually use steel wire to fix the top,middle and bottom and use special material to protect zinc. |
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