As part of the prestigious Vietnam Block B Gas Project, HT Energy has officially commenced the Site Acceptance Test (SAT) for the Subsea Isolation Valve (SSIV) system. This critical technical phase is being conducted at the Alpha ECC fabrication yard for our key clients, PTSC MC and PQPOC.
Specialized High-Pressure Hydraulic Solutions
For this campaign, HT Energy is providing a comprehensive package including:
- Dummy Hydraulic Power Unit (HPU): A high-pressure unit engineered and fabricated in-house by HT Energy.
- Control Manifold System: Designed for precise pressure distribution and monitoring.
- Expert Operation Team: Highly skilled technicians and engineers to manage the testing sequence.
A standout technical requirement for this project is the use of HT804 water-based hydraulic fluid. To protect the sophisticated internal components of the SSIV actuator, HT Energy ensures the fluid undergoes a rigorous filtration process. Before being charged into the HPU, the oil is cleaned to meet the strict NAS Class 6 cleanliness standard, preventing any potential contamination or seal damage during high-pressure operations.
Quality Assurance and Pre-Test Verification
Reliability is the cornerstone of HT Energy’s operations. Prior to deployment at Alpha ECC, the HPU and associated equipment underwent a comprehensive Pre-FAT (Factory Acceptance Test) at the HT Workshop. This stage was performed under the direct witness and approval of PQPOC and PTSC MC representatives, ensuring all equipment met project specifications before arriving at the site.
The SAT Procedure: A Critical Project Milestone
The SAT campaign, which began on January 10 and is scheduled for completion by January 21, involves a series of rigorous functional verifications:
- Functional Verification: Confirming the open/close status via mechanical indicators and electrical continuity tests of the limit switches.
- Pressure Integrity: Utilizing the HPU to supply a minimum pressure of 159 bar to verify full valve actuation and recording actual opening pressures.
- Safety & Leak Checks: Visual inspections for hydraulic integrity at all tie-in points and verifying the fail-safe functionality of the SSIV.
This testing phase is an essential prerequisite before the SSIV skid and umbilical cables are transported offshore for installation. Ensuring 100% functionality at the fabrication yard significantly mitigates technical risks and optimizes the offshore execution timeline.
Future Outlook
Following the successful conclusion of the SAT, HT Energy is prepared for the next phase. The client expects to mobilize the HPU and our technical team offshore in early March to support the final installation and subsea integration. This project once again demonstrates HT Energy’s capability to deliver high-end hydraulic solutions for the most demanding offshore environments.
