Durable Tangent Tower Factory in China

As the main backbone-type tower of overhead transmission lines, the straight-line tower accounts for more than 80% of the total number of transmission towers across the network. It is the most widely used basic tower type in power grid infrastructure, new energy plant transmission, and urban-rural power grid upgrade projects.

Qingdao Anbang New Energy, relying on the Shandong steel structure manufacturing base and the technology accumulation of a national high-tech enterprise, is deeply engaged in the research and manufacturing of the entire transmission steel structure industry chain.

Our factory has developed a full voltage-level series of straight-line angle steel tower products, covering mainstream transmission conditions of 35kV, 110kV, 220kV, and 330kV, including all tower types such as the Gan-shaped, goblet-shaped, owl-shaped, and ram-horn-shaped designs.

What is Tangent Tower?

Anbang Tangent Towers are positioned as exclusive load-bearing structures for straight transmission sections, only bearing the weight of conductors and ground wires, ice loads, and horizontal wind loads, without enduring longitudinal tension and angle tension of the lines.

Focusing on lightweight truss mechanical design, all-condition weather-resistant anti-corrosion, precise structural optimization, and convenient construction and maintenance, they are adaptable to diverse infrastructure scenarios such as plains, hills, mountains, coastal high-humidity and salt-spray environments, and new energy parks.

They provide a stable, long-lasting, and cost-effective steel structure support system for long-distance transmission corridors, simultaneously meeting the project requirements for photovoltaic and wind power delivery, urban-rural grid transformation, and inter-provincial power networking, serving as the fundamental load-bearing core component of new energy power transmission networks.

Our Full Series Tower Specification System

1. Low Voltage Conventional Series (35kV/110kV)

Mainly the above Z-shaped and simplified dry-type towers, with low and lightweight tower bodies, small foundation footprint, suitable for urban and rural distribution networks, township transmission branches, and small nearby grid-connected new energy projects.

2. High Voltage Trunk Series (220kV/330kV)

Standard dry-type and cup-shaped straight towers, optimized cross-arm spacing and insulation coordination distance, sufficient stiffness redundancy, suitable for main transmission lines of the power grid, cross-regional transmission trunk lines, and outgoing lines of large wind and solar power stations.

3. Compact Specialized Series

Narrow-based compact straight towers, reducing tower root span and corridor footprint, suitable for projects in areas with limited land resources, residential areas nearby, and restricted ecological corridors; also compatible with small-angle and minor turning conditions, increasing flexibility in line layout.

4. General Structural Parameters

Main materials are Q345B and Q420 high-strength low-alloy steel, full tower bolt-assembled truss structure, trapezoidal tapered tower body design, tower height ranging from 18m to 75m, suitable for conventional span lengths of 80m to 400m, strictly complying with GB50545 Power Transmission Line Design Specification and DL/T steel structure industry standards for production and manufacturing.

Core product advantages

(1) Structural Optimization

Relying on the finite element structure simulation and analysis technology, the cross-section, inclined material arrangement and joint stress of the tower body are optimized in the whole area, abandoning the traditional redundant material design.

Under the condition of meeting the national load requirements of wind resistance, earthquake resistance and ice covering, the self-weight of the tower body is optimized by 12%~18%, the truss force transmission path is clear, and the deflection control accuracy is better than the industry average.

The foundation root opening is smaller, the earthwork excavation amount and concrete consumption are reduced simultaneously, which greatly reduces the project land acquisition and civil construction costs, and achieves the optimal balance between structural safety redundancy, material utilization rate and project cost.

(2) Corrosion-resistant

Anbang adopts the national standard hot-dip galvanizing whole process.

The steel is dipped in the whole area, and the thickness of the zinc layer is uniform and stable ≥ 85μm, combined with passivation and sealing treatment, to resist coastal salt spray, industrial acid and alkali, damp condensation, rain, snow and freeze-thaw and other environmental corrosion.

The product design base life is 50 years, and the anti-corrosion layer decays slowly during outdoor service, greatly reducing the frequency of later paint repair and rust removal operation and maintenance, reducing the operation and maintenance cost of the whole life cycle, and adapting to complex regional environments such as the Shandong coast, inland high humidity, and severe cold and ice in the north.

(3) Self-developed security patent structure

Equipped with Anbang New Energy's recyclable anti-climbing patented structure, the tower is equipped with a retractable access pedal, which is automatically recycled and hidden when idle on a daily basis, preventing irrelevant personnel from climbing in violation of regulations.

Only professional operation and maintenance personnel can unlock and expand the maintenance channel, taking into account the safety protection of high-altitude work and public security control, filling the security gaps of traditional towers without protection and easy to climb, and meeting the requirements of power grid safety standardization.

(4) Prefabricated modular manufacturing

The whole tower component factory standardizes blanking, punching, and pre-assembly, and all bolt holes are accurately matched, and there is no need for secondary cutting and welding on site, and pure bolt splicing and assembly is required.

Lightweight splitting of components, no problem of road transportation, and convenient transfer of rugged mountainous road sections.

Simplified installation process, shortened high-altitude work time, and synchronously reduced construction manpower and construction period costs, suitable for emergency power grid repair and batch infrastructure rush projects, convenient dismantling and modification and component replacement, and has secondary reuse value.

(5) Adapt to a wide range of environments

The structural design covers 8 levels of earthquake resistance, 12 levels of wind resistance, and severe ice covering conditions.

The toughness of steel does not degrade in severe cold and low temperature environments, and the structural performance of coastal high-salt environments is stable.

The foundation form is flexibly adapted to excavated foundations, slab foundations, and shallow buried step foundations, suitable for multiple geology of mud, slopes, mountains, and flats, without large-scale site transformation.

It is suitable for non-standard scenarios such as peripheral transmission corridors of new energy stations and line networking in remote mountainous areas.

(6) Whole chain of quality control

As a national high-tech enterprise, Anbang has established a full-process quality inspection system for steel factory re-inspection, blanking accuracy testing, weld flaw detection, galvanized layer testing, and load simulation test.

Strictly benchmark the manufacturing standards of the State Grid and China Southern Power Grid, with strong interchangeability of components and zero deviation in batch supply sizes to ensure the consistency of batch erection of lines.

Application scenarios

The high-voltage/low-voltage backbone straight transmission channel of the State Grid and local power grid;

Photovoltaic power stations and wind farms send new energy power to special lines;

Urban and rural power grid upgrades, rural grid transformation, and internal power supply lines in industrial parks;

Power transmission projects in restricted corridors such as hilly mountains, coastal coasts, and ecological reserves;

Batch networking of long-distance straight lines and supporting tension-resistant towers to build a complete transmission system.

Enterprise supporting services

Qingdao Anbang New Energy provides one-stop full-chain solutions, from early line survey, tower type customized design, drawing in-depth verification, to factory mass production and manufacturing, logistics vehicle distribution, on-site installation technical guidance, and later operation and maintenance integrated services.

We support overseas export customization, personalized research and development of non-standard parameters, rely on the production capacity advantages of Jiaozhou Intelligent Manufacturing Industrial Park, ensure large-scale rapid delivery, and provide reliable steel structure support for domestic and foreign power infrastructure projects with stable production capacity, hard-core quality, and full-cycle service.