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42FT Octagonal Galvanized Electric Steel Pole with 750KGF Load Capacity for 33KV Sub-Transmission
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Detail Information |
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| Highlight: | 42FT overlap connection pole,octagonal galvanized steel pole,750KGF sub-transmission utility pole |
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Product Description
42FT Overlap Connection Octagonal Galvanized Electric Steel Pole 750KGF for 33KV Sub-Transmission
Yixing Hongxin Illumination Facilities Co., Ltd. delivers the 42FT overlap-connection octagonal galvanized electric steel pole, rated at 750KGF for 33KV sub-transmission and heavy-duty distribution networks. The overlap connection design employs a precision-engineered telescoping joint where the upper section inserts into the lower section with a controlled interference fit, secured by through-bolts, creating an exceptionally strong, fatigue-resistant junction. Backed by 25+ years of manufacturing heritage in galvanized steel utility structures, Hongxin produces these poles using Q345B structural steel with full-process CNC forming, automated longitudinal welding, and ISO 1461 hot-dip galvanization. The octagonal profile minimizes wind-induced galloping and vortex shedding, extending conductor and insulator service life in regions prone to high winds and tropical storms.
Key Features
- Overlap Connection Technology: Telescoping joint with precision interference fit and through-bolt locking provides superior bending moment transfer compared to slip-fit alternatives, ideal for tall poles and angle configurations where joint strength governs design.
- 750KGF Heavy-Duty Rating: Designed for 33KV sub-transmission lines with higher conductor weights, longer span lengths, and elevated mechanical safety factors as required by national utility grid codes.
- Wind-Optimized Octagonal Profile: The eight-sided cross-section reduces aerodynamic drag coefficient versus round poles, minimizing wind-induced oscillation that accelerates conductor fatigue and hardware loosening over decades of service.
- Through-Bolt Joint Locking: Field-installed galvanized through-bolts create a positive mechanical lock at the overlap region, providing redundancy beyond friction grip alone and enabling visual inspection of joint integrity during routine maintenance.
- Automated Welding Process: Longitudinal seam welds are performed by robotic welding cells with real-time parameter monitoring, ensuring consistent penetration and eliminating the variability inherent in manual welding operations.
- Full-Length Taper Optimization: Wall thickness and diameter are continuously tapered using computer-controlled forming, placing material exactly where structural analysis demands it for maximum strength-to-weight efficiency.
Technical Specifications
| Parameter | Specification |
|---|---|
| Height | 42FT (12.80 meters) |
| Material | Q345B (ASTM A36 equivalent) |
| Shape | Octagonal (8-sided) tapered |
| Wall Thickness | 3.5mm - 5.0mm |
| Design Load | 750KGF |
| Surface Treatment | Hot-dip galvanization, ISO 1461 |
| Connection Type | Overlap (telescoping with through-bolts) |
| Number of Sections | 2 sections |
| Overlap Length | 1.5x bottom section top diameter |
| Zinc Coating Thickness | ≥ 85μm average |
| Applicable Voltage | 22KV / 33KV |
| Wind Speed Rating | Up to 180 km/h |
Applications
The 42FT overlap-connection galvanized steel pole is engineered for 33KV sub-transmission lines, heavy-duty angle and terminal poles, and primary distribution corridors in high-wind regions. The overlap connection provides the structural robustness demanded by dead-end configurations, where conductor tension applies concentrated loads at the pole top. Typical installations include substation entry and exit structures, river and highway crossing poles, and long-span distribution lines in open terrain. The pole accommodates all standard utility hardware for 33KV systems including polymeric long-rod insulators, horizontal and vertical disconnect switches, and pole-mounted distribution transformers up to 200KVA. Custom hole patterns, grounding provisions, and climbing step configurations can be factory-integrated.
Packaging & Quality Assurance
Pole sections are individually wrapped, matched sets bundled together, and shipped in steel-framed export crates optimized for 40FT high-cube containers. Through-bolts and hardware are packed separately in corrosion-protected boxes. Documentation package includes Q345B material certificates, robotic weld parameter logs, galvanization reports with coating thickness measurements, and final assembly check records. Third-party inspection by client-nominated agencies is welcomed at all production stages. Standard warranty covers 12 months against manufacturing defects. Delivery within 30-40 days from order confirmation, with minimum order of 10 pieces.
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