12m 14m 15m (40ft 45ft 49ft) 22kV 33kV Sub-transmission Pole Multi-Section Slip Joint Monopole Tower Hot Dip Galvanized Q355B/A572/S355JR

Product Title

12m 14m 15m (40ft 45ft 49ft) 22kV 33kV Sub-transmission Pole Multi-Section Slip Joint Monopole Tower Hot Dip Galvanized Q355B/A572/S355JR

Product Overview

Multi-section octagonal steel poles designed for 22kV/33kV sub-transmission networks. Manufactured from Q355B/A572 Gr.50/S355JR steel, hot-dip galvanized to ASTM A123, and engineered to ASCE 48 / IEC 60826.

Buyer Conclusion: Specifically engineered for high-voltage clearance with a multi-section slip joint design that fits into standard 40HQ containers. Suitable for sub-transmission lines, transformer mounting, and heavy load applications. Boundary: Field welding is not required; final foundation design must be verified by local civil engineers based on soil conditions.

Buyer Problem / Cause

1. Shipping Constraints: Poles longer than 12m exceed the internal length of standard 40HQ containers, significantly increasing sea freight costs if shipped as single pieces.

2. Joint Corrosion & Alignment: Improperly designed slip joints can become weak points for water accumulation, rust, and structural misalignment during on-site assembly.

3. Standard Compliance: 33kV lines require strict electrical clearances and higher bending moments. Cheap sub-standard poles often fail to meet international design codes (ASCE/IEC), causing safety hazards.

Solution / How it Works

• For Shipping & Assembly: 12m-15m poles are designed as 2 or 3 sections with overlapping slip joints. They fit efficiently into 40HQ containers. We conduct a factory pre-assembly test and mark the insertion depth to ensure seamless on-site telescoping without field welding.

• For Corrosion Protection: The slip joint area receives specialized surface treatment before galvanization to prevent internal rust. Hot-dip galvanized to ASTM A123 / ISO 1461 (Min. 85μm) ensures 25+ years of maintenance-free lifespan.

• For High Voltage & Load: Using Q355B (ASTM A572 Gr.50) high-strength steel, the pole's wall thickness (3.0-6.0mm) and base diameter are calculated to withstand 33kV wire tension and extreme wind loads.

Key Specifications / Attributes

Product Selling Points

1. Container-Optimized Multi-Section Design
12m to 15m poles are divided into 2 or 3 slip-joint sections. This design maximizes container space utilization, drastically reducing ocean freight costs. Factory pre-assembly guarantees 100% on-site fit.

2. Multi-Standard Material Traceability (Q355B/A572/S355JR)
We use Q355B high-strength steel, strictly equivalent to ASTM A572 Gr.50 and EN S355JR. Every shipment includes Mill Test Certificates (MTC) verifying chemical composition and yield strength (≥345 MPa), ensuring global project compliance.

3. Heavy-Duty Hot-Dip Galvanization
Hot-dip galvanized to ASTM A123 / ISO 1461 with a minimum coating of 85μm. The slip joint areas are specially treated to prevent internal oxidation, extending the pole's service life to 25-30 years in harsh outdoor environments.

4. Zero Field-Welding Installation
Slip joints are pre-marked with insertion depth lines. On-site installation only requires a crane to lift and telescope the sections together, eliminating the need for specialized welding equipment and certified welders on site.

5. Third-Party Inspection & Full Documentation
ISO 9001:2015 certified. We provide complete technical dossiers, including dimensional inspection reports, welding NDT reports (UT/MT), and galvanizing thickness tests. SGS, BV, and TPI inspections are fully supported.

FAQ

Q1: Since the pole is 12-15m, how is it packed for shipping?
A: They are manufactured as 2 or 3 sections with slip joints. We will conduct a factory pre-assembly test and mark the insertion depth. The sections will be nested and bundled properly to fit perfectly into a standard 40HQ container, saving shipping costs.

Q2: How do you prevent the slip joint from rusting?
A: Before galvanizing, we apply a specialized anti-corrosion treatment to the joint area. After hot-dip galvanizing (min. 85μm), the overlapping design naturally sheds water. We also provide a protective coating on the joint during transport.

Q3: Can you customize the pole to meet our wind load and ice load requirements?
A: Yes. Our engineering team designs to ASCE 48, IEC 60826, or your local standards. Please provide the wind speed (m/s), ice thickness (mm), wire size (mm²), and safety factor. We will customize the wall thickness and base diameter accordingly.

Q4: How do you guarantee the welding quality?
A: Welding is performed strictly to AWS D1.1 or EN 1090-2 by certified welders. Longitudinal seams use automatic submerged arc welding (SAW). We conduct Ultrasonic Testing (UT) or Magnetic Particle Testing (MT) on critical welds before galvanizing.

Q5: Do you provide foundation drawings?
A: We provide pole base details (direct burial depth or flange plate dimensions) and recommend foundation loads. The final civil foundation design (concrete size and rebar) should be confirmed by your local structural engineer based on soil conditions.

How to Choose / CTA

Ready to get a precise quote?
To provide an accurate technical drawing and quotation (FOB/CIF/EXW), please send us the following parameters:

1. Target standard (ASCE, IEC, or local code)

2. Voltage class (22kV / 33kV) and wire specifications

3. Required height (12m, 14m, or 15m)

4. Design wind speed and ice load

5. Foundation type (Direct Burial or Flange)

Contact us now — our engineering team will reply within 24 hours on working days with a tailored solution.

Send your project details: height, type, material, wind speed, luminaire load, foundation, quantity, and destination.
We will reply with selection confirmation, drawing check, quotation, and lead time.

• Company: Futao Metal Structural Unit Co., Ltd.
• Official Website: http://www.metalpowerpole.com
• WhatsApp: 0086-13812516912,13665163520
• Email: li@fu-tao.com,sales2@futaogroup.com