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50FT 55FT ISO Certified Hot Dip Galvanized Polygonal Steel Poles with Two Segments
Product Details:
| Place of Origin: | Jiangsu, China |
| Brand Name: | HX Steel Pole |
| Certification: | ISO 9001:2015, ISO 1461 |
| Model Number: | HX-5055 |
| Document: | Company Profile-HX.pdf |
Payment & Shipping Terms:
| Minimum Order Quantity: | 3 Pieces |
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| Price: | USD 350-680 / Piece |
| Packaging Details: | Nude packing with anti-rust protective coating, steel-strapped on fumigated timber pallets |
| Delivery Time: | 20-30 working days |
| Payment Terms: | T/T,L/C,Western Union |
| Supply Ability: | 2000 Pieces per Month |
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Detail Information |
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| Material: | Q420B High-Tensile Steel | Height: | 50FT 55FT |
|---|---|---|---|
| Shape: | Tapered Polygonal | Voltage Level: | 33kV |
| Surface Treatment: | Hot-Dip Galvanized Per ISO 1461 | Zinc Coating Thickness: | ≥100μm (min 700g/m²) |
| Wind Speed Rating: | 180 Km/h | Top Diameter: | 220mm |
| Bottom Diameter: | 480mm | Wall Thickness: | 5mm |
| Joint Type: | Slip-joint With 1.5x Diameter Overlap | ||
Product Description
50FT 55FT ISO Certified Hot Dip Galvanized Polygonal Steel Poles with Two Segments
Product Overview
The 50ft and 55ft transmission steel poles are for 33kV sub-transmission networks. Constructed from Q420B high-tensile steel (yield strength ≥420 MPa) and protected by ISO 1461 hot-dip galvanization with ≥100μm zinc thickness.
Key Features
- Q420B High-Tensile Steel: 420 MPa minimum yield strength allows longer spans with fewer intermediate poles, reducing total project cost
- ISO 1461 Galvanization (≥100μm): Superior zinc coating thickness exceeding ASTM A123 minimums, certified for C4 (high-corrosivity) environments
- Slip-Joint Quick Assembly: Engineered overlap connections eliminate on-site welding; each section nests securely with guided alignment
- Multi-Circuit Ready: Pre-engineered for double-circuit and single-circuit configurations with factory-welded arm attachment points
- Seismic Resistant Design: Compliant with IEC 60826 loading criteria for wind zones up to 180 km/h and seismic zone IV
Technical Specifications
| Parameter | Value |
| Rated Voltage | 33kV |
| Pole Height | 50FT 55FT |
| Material Grade | Q420B (equivalent S420MC) |
| Top/Bottom Diameter | 220mm / 480mm |
| Wall Thickness | 5mm |
| Design Standard | IEC 60826 / ASCE 48-11 |
Applications
Designed for 33kV overhead sub-transmission lines, grid interconnection projects, industrial feeder lines, wind farm collector circuits, and mining site power distribution where high mechanical strength and corrosion resistance are critical.
Quality Assurance
Rigorous QA protocol includes: 100% automated submerged arc welding (SAW) with UT inspection, dimensional compliance per GB/T 2694-2018, zinc coating uniformity testing per ISO 1461, and full MTR (Material Test Report) documentation with each shipment.
Customization Options
Available in heights from 12m to 24m, single or double circuit configurations, custom cross-arm mounting patterns, step bolts and climbing devices, aviation warning paint, and anti-climbing guards. Engineering design review included for orders over 10 tons.