Corrosion-Resistant CT Series Cable Trunking Solution for Shanghai Hongqiao International Airport

2026-04-22

Project Overview

Shanghai Hongqiao International Airport stands as a critical transportation hub in the Yangtze River Delta, serving millions of passengers annually and functioning as the core of the Hongqiao International Open Hub. To ensure the reliability of its critical electrical systems—supporting navigation, baggage handling, passenger services, and 24/7 operations—the airport required a high-performance cable management solution. Shanghai Qiongkai Industrial Co., Ltd. was awarded this landmark project, valued at RMB 30 million (approximately USD 4.2 million), to supply custom CT Series Cable Trunking and slotted channels (unistrut channels) tailored to the client’s stringent requirements.

Shanghai Hongqiao International Airport Project

Key project specifications included:

Product Scope: CT Series Cable Trunking (custom sizes) and slotted channels for comprehensive cable routing and protection
Corrosion Protection: Hot-dip galvanization (HDG) with a minimum zinc coating thickness of 65µm (compliant with GB/T 18226-2025) to withstand the airport’s humid, high-traffic environment
Installation Enhancement: Additional powder coating over the hot-dip galvanized surface to facilitate streamlined cable management and on-site assembly
Supply Cycle: 12-month phased delivery aligned with the airport’s phased construction timeline
Quality Compliance: Adherence to national electrical construction standards (GB 50303-2015, GB 50168-2018) and a minimum 20-year design life

Core Challenges

The project presented unique technical and logistical hurdles that demanded innovative solutions:

Electrostatic Adhesion Barrier: Hot-dip galvanized surfaces inherently have low surface energy and electrostatic resistance, which typically prevents effective powder coating adhesion.

Dual Performance Balance: The solution had to preserve the 65µm zinc layer’s corrosion resistance while ensuring the powder coating’s integrity.

Infrastructure Rigor: Components required compliance with strict standards for structural stability, fire safety, and long-term reliability.

Scheduled Supply Assurance: The 12-month delivery cycle required precise production planning and phased shipment.

Innovative Solutions

Shanghai Qiongkai’s engineering and project management teams developed an integrated solution to address technical and logistical challenges:

1. Technical Breakthrough for Dual-Coating Compatibility

Proprietary Precision Grinding: Implemented a controlled abrasive treatment on CT Series Cable Trunking’s hot-dip galvanized surface to enhance electrostatic attraction.
Optimized Powder Coating Parameters: Adjusted electrostatic spray voltage and powder feed rate to match the modified surface properties.
Dual-Quality Inspections: Conducted 100% batch testing for zinc layer thickness and powder coating adhesion.

2. Streamlined Supply Chain Management

Phased Production Planning: Divided the total order into 4 quarterly batches, synchronized with the airport’s construction milestones.
Digital Inventory Tracking: Utilized a real-time inventory system to monitor CT Series stock levels proactive adjustments.

Implementation

Pre-Production Validation: Completed small-batch trials of CT Series Cable Trunking to confirm grinding parameters.

Mass Production & QC: Implemented inline inspections at every production stage (material selection, galvanization, grinding).

Phased Delivery: Delivered 4 batches on schedule over 12 months, with technical guidance provided for installation.

Compliance Verification: Conducted final batch inspections to confirm adherence to all industry standards.

Results & Value Delivered

Technical Success: The proprietary grinding process achieved 100% coating coverage with zero delamination for all CT Series components.

Superior Durability: Extended service life to over 25 years—surpassing the 20-year requirement—and passed 1000-hour salt spray testing.

Installation Efficiency: Reduced on-site cable management time by 25% and assembly time by 15%.

Supply Chain Reliability: 100% on-time delivery across all 4 batches, supporting construction without delays.

Key Takeaways

This project showcases Shanghai Qiongkai Industrial Co., Ltd.’s ability to combine technical innovation with meticulous project management to solve complex infrastructure challenges. By addressing the inherent conflict between hot-dip galvanization and powder coating, we delivered a CT Series Cable Trunking solution that meets both performance and efficiency demands for one of the world’s busiest airports. The success underscores our commitment to tailored engineering, quality excellence, and reliable supply chain management—core strengths that drive value for clients in critical infrastructure sectors.