Project Overview
This project involved the removal, replacement, and reinstatement of a critical pipeline section serving the Automatic Waste Collection System located at Al Raha Beach Bridge. The works were carried out within a complex bridge and marine-influenced environment, requiring precise engineering execution, strict safety control, and full integration of new corrosion-protected pipeline systems. The objective was to restore system functionality while ensuring long-term durability, structural integrity, and compliance with marine infrastructure standards.
Project Objectives
- Replace and reinstate damaged pipeline sections within an operational waste collection system
- Ensure structural integrity and uninterrupted system performance
- Execute works safely within a bridge and marine-adjacent environment
- Implement high-quality welding, insulation, and support systems for long-term reliability
Scope of Work
1. Removal & Disposal
- Dismantling and removal of existing pipelines and insulation materials
- Safe handling, segregation, and disposal of waste materials in compliance with environmental regulations
- Preparation of the structure for new installation works
2. Supply & Installation of New Pipeline
- Supply of 20” ERW Carbon Steel Pipe (API 5L Gr B, 3LPE coated)
- Pipe specification: 508mm diameter x 9.5mm thickness (11.9m length)
- Installation and alignment of new pipeline sections along bridge structure
- Installation of insulation in accordance with project specifications
3. Welding & Structural Integration
- In-situ welding of pipeline sections to accommodate bridge curvature and alignment constraints
- Execution by certified welders under controlled site conditions
- All welds subjected to Ultrasonic Testing (U/S) for integrity verification
4. Structural Supports & Fixings
- Installation of U-clamps and screw-jacks, including reinforced central support points
- Load-bearing fixings subjected to pull testing to verify stability and safety
- Use of engineered suspended platforms designed for welding operations
5. Marine Safety & Support Operations
- Marine Safety Engineer deployed for full supervision
- Certified rescue boat with divers, lifeguard, captain, and skipper
- Installation of navigation markers to indicate reduced air-draft clearance and ensure maritime safety
6. Temporary Works & Access Control
- Installation and inspection of scaffolding structures (third-party certified)
- Hoarding and securing of scaffold towers to prevent unauthorized access
- Controlled material storage within designated approved areas only
- Ensuring compliance with safety and site logistics requirements
7. Fire Safety & Protective Measures
- Installation of fire-retardant netting materials
- Implementation of safety systems for elevated and marine-adjacent works
- Strict adherence to approved safety protocols and risk assessments
Coating System
Application of a high-performance 3LPE (3-Layer Polyethylene) pipeline coating system, selected to withstand aggressive coastal and structural conditions:
- API 5L Gr B Carbon Steel Pipe base
- 3LPE coating applied for long-term corrosion resistance
- Installation of precise thermal/environmental insulation layers
Technical Highlights
- In-situ welding along a curved bridge structure
- Ultrasonic testing (U/S) of all welded joints for complete integrity verification
- Pull testing of all structural load-bearing fixings
- Deployment of marine safety rescue vessels and engineered suspended platforms
Challenges & Solutions
Executing pipeline installation along a curved bridge structure under marine exposure conditions
Use of in-situ welding techniques combined with engineered support systems ensured precise alignment and structural stability
Maintaining safety during elevated works above water and restricted access zones
Deployment of marine safety supervision, rescue vessels, and certified access systems ensured controlled execution
Final Outcome
The project was successfully completed with the full reinstatement of the Automatic Waste Collection System pipeline, ensuring restored functionality, improved structural integrity, and enhanced corrosion resistance. The system now operates with improved reliability and long-term durability in a demanding bridge environment.
Project Impact
Restored full functionality of critical waste collection infrastructure
Enhanced structural safety and corrosion resistance
Delivered a high-quality engineered solution in a complex marine-bridge environment