Project Overview：
This landmark project involved the installation of the world’s largest diameter (3.5m) HDPE pipeline for seawater cooling systems in the Jizan Industrial City, with a total pipeline length of 6,600 meters located in unprotected waters with complex hydrological conditions .
Technical Highlights：
Pipeline Specifications: 3.5-meter diameter HDPE pipes, the largest flexible pipes ever installed worldwide
Innovative Connection Technology: Implemented adaptive electrofusion welding ring technology with hydraulic cylinders that ensure precise sealing, controlling errors within 1mm
Advanced Installation System: Developed a real-time monitoring and navigation system for long flexible pipeline flotation, with attitude sensors installed every 16 pipe sections
Precision Sinking: Utilized a “three-stage automatic deceleration” sinking scheme with airbags and sacrificial slings, controlling the sinking speed to 0.3 meters per second with 99% accuracy
Project Significance
This project set a new global benchmark for large-diameter HDPE pipeline installation in marine environments, demonstrating exceptional technical capabilities in handling extreme engineering challenges .
Advanced Life Support System for a Major Aquarium Using Large-Diameter HDPE Pipes
November 19, 2025
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