66kv Steel Electrical Power Pole For Transmission Pole Design
| Pole’s height | ≥5m |
| Type | Low ,Middle and higher Voltage |
| Shape of pole | Conical, Round, Polygonal (Octagonal, Dodecagonal, etc). |
| Crossarm | Designas per customers’ requirement |
| Material |
Steel materials conform to ASTM A36, ASTM A572. |
| Wall thickness | 2.5mm , 2.75mm, 3.0mm, 3.5mm, 3.75mm, 4.0mm, 4.5mm, 4.75mm, 5.0mm,etc |
| Sections |
≤11900mm can be with one section and loaded into 40HQ container. |
| Welding |
Welding complies with CSA and AWS D1.1 standard. |
| Joint | Joint with Slip Joint or flange mode. |
| Installation |
1. Burial Type. |
| Galvanizing | Hot dip galvanization in accordance with Chinese standard GB/T 13912-2002 or American standard ASTM A123. |
| Min Yield Stress | 345 Mpa |
| Min Tensile Strength | 470 Mpa ~ 630 Mpa |
| Voltage | 10KV~550KV |
| Limited Weight | 26 Ton/Container |
| Certificates | ISO 9001-2008 , AAA credit rating, etc |
| Protection | Anti-corrosion and rust free – suitable for coastal area, desert, oil field and industrial area |
Installation
The designing weight of the steel poles are usually relatively light and is good for the operation, transportation,
assemble and installation.
Steel
The material is in accordance with NF EN 10025 standard and NF EN 10149 standard, it has the following
property.
- Yield Strength=355 N/mm2
- Thoughness remains the same under 20 degrees below zero
- Galvanization is in accordance with NFA35503 standard class I
Maintenance
The hot dip galvanization treatment can increase the service life of the steel pole without the environmental
pollution and no need for other daily maintenance. The following described types are specially designed for
Africa Market which can meet the regulated height and load standard of France electricity power company.
Production
Our steel pole is bent to form to the polygonal (conical) section firstly. Then it is welded by the automatic
submerged-arc. Then it is welded by the automatic submerged-arc welding machine.
Thirdly the top cap, strip and base plate will be welded to the pole. And finally other accessories
(support brackets, ladder support, etc.) will be welded to the pole shaft.
Manufacturer Tolerance
- Component Length: -25mm to 75mm
- Straightness: 2mm/m
- Twisting degree: 1̊ per 3 meters length
- Ovalisation : Maximum is 3%
- The average diameter : +/-0.5%
- Slip length: +/-150mm
Mechanical Property
The metal supports are designed to withstand the nominal force F and the pressure of the wind V applied at
0.25m from the top. Under these loads, the safety factor with respect to the elastic limit of the steel is larger
than 1.8. The post also resists a torque equal to (F+V) ×1m. Tests shows the load intervened when breaking
is around 2 times of design load.
