TOAN THANG (TTE) – MAIN CONTRACTOR FOR
INDUSTRIAL VALVE MAINTENANCE & REPAIR PROJECT AT FPSO CHIM SAO – PREMIER OIL
In 2023, Toan Thang Engineering Corp (TTE) was honored to once again be entrusted by Premier Oil Vietnam Offshore B.V. (Harbour Energy) to execute the Maintenance, Repair, and Replacement of the Industrial Valve System at the Engine Room and Topside of FPSO Chim Sao.
This project was a key part of the 2023 Slowdown Maintenance Campaign, playing a critical role in ensuring the safety and stability of offshore oil and gas operations.
📍 Location: FPSO Chim Sao – Chim Sao Field, offshore Vung Tau
📅 Execution Period: January 2023 – October 2023
⚙️ Scope of Work: Overhaul, repair, and replacement of industrial valves in the Engine Room & Topside

Requiring deep overhaul expertise
🔹 Work details include:
✔️ Overhauling control valves, safety valves, and isolation valves
✔️ Replacing damaged and degraded valves
✔️ Inspecting, maintaining, and calibrating actuators and control units
✔️ Pressure testing & leak inspection in compliance with API 6D standards
✔️ Flange management and certification
✔️ Comprehensive technical reporting & acceptance documentation
⚡ Project Challenges & Workload
🔹 Scope: Overhaul of 06 valves and replacement of 06 valves
🔹 Valve specifications: Sizes 2” to 4”, operating pressures #600 to #2500
🔹 Systems covered:
- Steam system
- Fuel gas system
- Feedwater system
🔹 Execution offshore in the harsh FPSO Chim Sao environment
🔹 Critical valve conditions: Continuous operation for years, requiring deep overhaul expertise
🔹 Strict HSE compliance: Adherence to Harbour Energy’s safety and operational standards
🔹 Stringent QA/QC: Every step subjected to rigorous quality control
🔹 Tight shutdown schedule: Ensuring no delays impact oil & gas production plans
🏆 Toan Thang’s Outstanding Achievements
✅ Deployed experienced offshore engineers & technicians for direct execution
✅ Utilized state-of-the-art specialized equipment: Hydrotest pump, portable lapping machine, 10FT tool container, and more
✅ Replaced all components with OEM parts meeting API & ANSI standards
✅ 100% successful pressure testing & certification
✅ Comprehensive technical reporting with real-time images, test reports, and certificates
✅ Ensured stable operation of critical valve systems on FPSO Chim Sao
✅ Guaranteed absolute safety for offshore oil and gas activities
✅ Highly rated by Harbour Energy for technical capability and strict HSE compliance
✅ Reaffirmed Toan Thang’s position as a top-tier contractor in offshore industrial valve maintenance & repair

Inspection and acceptance
This project is a testament to Toan Thang’s deep technical expertise, unmatched safety and quality control, and our ability to thrive in extreme offshore environments.
We are ready to partner with industry leaders in Oil & Gas, Petrochemical, and Thermal Power across Vietnam and international markets.
📞 Looking for a Trusted Offshore Valve Maintenance Contractor?
👉 Contact Toan Thang today for expert technical consultation and solutions! 🚀