Transmission Steel Tube Tower
Transmission Steel Tube Tower
Transmission structures are one of the most visible elements of the electric transmission system. They support the conductors used to transport electric power from generation sources to customer load. Transmission lines carry electricity over long distances at high voltages, typically between 115 kV and 765 kV (115,000 volts and 765,000 volts).
There are many different designs for transmission structures. Two common types are:
1. Lattice Steel Towers (LST), which consist of a steel framework of individual structural components that are bolted or welded together
2. Tubular Steel Poles (TSP), which are hollow steel poles fabricated either as one piece or as several pieces fitted together.
Structure sizes vary depending on voltage, topography, span length, and tower type. For example, double-circuit 500-kV LSTs generally range from 150 to over 200 feet tall, and single-circuit
500-kV towers generally range from 80 to 200 feet tall. Double-circuit structures are taller than single-circuit structures because the phases are arranged vertically and the lowest phase must maintain a minimum ground clearance, while the phases are arranged horizontally on single-circuit structures. As voltage increases, the phases must be separated by more distance to prevent any chance of interference or arcing. Thus, higher voltage towers and poles are taller and have wider horizontal cross arms than lower voltage structures.
DESIGN SPECIFICATION：
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Product
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Power Electric Transmission Line Steel Tube Tower |
|
Height
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From 10M-100M or according to client’s requirement |
| Suit for | Electric Power Transmission and Distribution |
| Shape | Polygonal or Conical |
|
Material
|
Normally Q235B/Q355B |
| Power Capacity | 10kV 11kV 33kV 35kV 66kV 110kV 132kV 220kV 330kV 500kV or other customized voltage |
| Tolerance of the dimension |
According to client’s requirement
|
|
Surface treatment
|
Hot-dip-galvanized following ASTM123, or any other standard |
| Joint of Poles | Slip joint, flanged connected |
| Standard | ISO9001:2015 |
| Length of per section | Within 13M once forming |
| Welding Standard | AWS(American Welding Society)D 1.1 |
| Production Process | Raw material test-cutting-bending-welding-dimension verify-flange welding-hole drilling-sample assemble-surface clean-galvanization or power coating /painting-recalibration-packages |
| Packages | Packing with plastic paper or according to client’s requirement |
| Life Period | More than 30 years, it is according to installing environment |
PRODUCT SHOWS：
For power transmission towers in various situations, you are welcome to come for customized consultation, professional design team and one-stop service are provided!
We need customers to provide the following basic parameters: wind speed, voltage level, line return speed, conductor size and span
MATERIALS：
In order to ensure the product quality, we start from the procurement of raw materials. For the raw materials, angle steel and steel pipes required for product processing, our factory purchases the products of large factories with reliable quality throughout the country. Our factory also needs to inspect the quality of raw materials to ensure that the quality of raw materials must meet national standards and have the original factory certificate and inspection report.
ADVANTAGES：
1. An authorized supplier in Pakistan, Egypt, Tajikistan, Poland, Panama and other countries；
2. The factory has completed tens of thousands of project cases so far, so that we have a wealth of technical reserves;
3. Facilitating supports and low labor cost make the product price have great advantages in the world.
4. With a mature drawing and drawing team, you can rest assured of your choice.
5. Strict quality control system and abundant technical reserves have created world-class products.
6. We are not only manufacturers and suppliers, but also your partners and technical support.
ASSEMBLY & TEST OF STEEL TOWERS：
After the production of the iron tower is completed, in order to ensure the quality of the iron tower, the quality inspector shall conduct assembly test on it, strictly control the quality, strictly control the inspection procedures and standards, and strictly inspect the machining dimension and machining accuracy according to the provisions of the quality manual, so as to ensure that the machining accuracy of parts meets the standard requirements.
Other Services:
1. The customer can entrust a third-party testing organization to test the tower.
2. Accommodation can be provided for customers who come to the factory to inspect the tower.
HOT DIP GALVANIZATION：
After assembly & test, the next step will be carried out: hot dip galvanizing, which aims at beauty, rust prevention and prolonging the service life of the steel tower.
The company has own galvanizing plant, professional galvanizing team, experienced galvanizing teachers for guidance, and processing in strict accordance with ISO1461 galvanizing standard.
The following are our galvanizing parameters for reference:
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Standard
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Galvanized standard: ISO:1461
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| Item |
Thickness of zinc coating
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| Standard and requirement | ≧86μm |
| Strength of adhesion | Corrosion by CuSo4 |
| Zinc coat not be stripped and raised by hammering | 4 times |
PACKAGE：
After Galvanization,we start to package,Every piece of our products is coded according to the detail drawing. Every code will be put a steel seal on each piece. According to the code, clients will clearly know a single piece belong to which type and segments.
All the pieces are properly numbered and packaged through the drawing which could guarantee no single piece missing and easily to be installed.
