Precision. Integrity. Flow Assurance.
Pipelines and flowlines are the arteries of the energy industry — critical for transporting hydrocarbons and process fluids safely and efficiently.
At DE COON SERVICES LIMITED, we specialize in engineering, construction, testing, integrity management, and rehabilitation of pipelines and flowlines for onshore, swamp, and offshore environments.
Our multidisciplinary teams combine civil, mechanical, and instrumentation expertise to ensure every line we install or maintain meets the highest operational, safety, and environmental standards.
We don’t just build pipelines — we build reliability, efficiency, and confidence.
Scope of Services:
1️⃣ Pipeline & Flowline Engineering
- Route survey and design optimization
- Stress analysis and material selection
- Flow assurance studies and corrosion modeling
- Hydraulic simulation and capacity assessment
- As-built documentation and CAD modeling
2️⃣ Construction & Installation
- Pipeline trenching, stringing, and welding (manual & automatic)
- Hot tapping, tie-ins, and terminal connections
- Flowline fabrication and spooling (carbon steel, stainless, GRE, duplex)
- Field joint coating, wrapping, and cathodic protection installation
- Pig launcher/receiver installation and testing
3️⃣ Testing & Commissioning
• Hydrostatic and pneumatic pressure testing
• Leak detection and flow verification
- Dewatering, cleaning, and gauging
- NDT (radiographic, ultrasonic, MPI, dye-penetrant)
- Pre-commissioning and start-up support
4️⃣ Pipeline Integrity & Maintenance
- Intelligent pigging and thickness surveys
- Corrosion inhibition and cathodic protection monitoring
- Leak repair (composite wrap and clamp systems)
- Flange management and bolting services
- Pipeline rehabilitation and replacement programs
5️⃣ Flowline Services
- Flowline fabrication and installation for wellheads and manifolds
- Flowline flushing, pressure testing, and certification
- Erosion, scaling, and paraffin control programs
- Flowline inspection, repair, and replacement
- Integration with production and early production facilities (EPF)
Specialized Capabilities
- Hot Work and Live Line Operations – Safe intervention on pressurized systems using certified isolation and containment methods.
- Smart Pigging and Data Analysis – Digital integrity assessment for corrosion and deformation trends.
- Remote Access & Swamp Operations – Pipeline construction and repair using amphibious equipment.
- Cathodic Protection (CP) Systems – Installation, survey, and monitoring for corrosion control.
- Emergency Response Services – 24/7 rapid mobilization for leaks, ruptures, or environmental incidents.
Quality & Safety Assurance
All pipeline and flowline operations are executed under strict compliance with:
• ASME B31.3 / B31.4 / B31.8 (Pipeline Design Codes)
• API 1104 (Welding of Pipelines & Related Facilities)
• ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018
• Client-specific HSE and integrity management standards
Our HSE culture prioritizes:
✅ Zero-incident operations
✅ Environmental protection
✅ Permit-to-work (PTW) compliance
✅ Skilled supervision and certified welders
Equipment & Resources
- Pipeline welding machines (automatic & semi-automatic)
- Hydrotest pumps and calibration instruments
- Intelligent pigging tools and leak detection systems
- Amphi-buggies and swamp excavators
- Coating, blasting, and wrapping equipment
- Mobile QA/QC and documentation units
Industries Served
- Upstream Oil & Gas (Onshore, Offshore, Swamp)
- Midstream Pipeline & Distribution Networks
- Refineries & Petrochemical Plants
- Process and Utility Pipelines
- Water and Industrial Fluid Systems
Project Experience
Case Study 1: Flowline Replacement Program – Niger Delta
• Scope: 12 km flowline replacement and rerouting for an IOC client.
• Result: Zero LTI, 20% schedule optimization, and improved line integrity.
Case Study 2: Pipeline Rehabilitation – Offshore Gas Export Line
• Scope: Intelligent pigging, clamp repair, and hydrotest validation.
• Result: Restored operational pressure rating with full compliance certification.
Case Study 3: Pipeline Construction Support – Early Production Facility (EPF)
• Scope: Flowline installation and tie-in to EPF manifold.
• Result: 100% mechanical completion achieved within project timeline.
