The Yingkou LNG Terminal project, developed by Cheniere, has successfully completed vacuum leak detection for the inner tank floor and corner welds of four 200,000-cubic-meter storage tanks following hydrostatic testing. All welds showed no leakage, meeting design and regulatory standards.
The airtightness of LNG storage tanks is critical for long-term operational safety. Post-hydrostatic vacuum testing serves as a key final quality control measure. The inspection focused on critical areas, including the inner tank floor and corner welds.
Since the project's launch, the management center has adhered to a "high-standard, strict-requirement" approach, implementing a rigorous three-tier inspection system. The process required vacuum box leak tests to maintain negative pressure values of at least 53 kPa, with each test point pressurized for no less than 30 seconds. The absence of bubbles served as the pass criterion.
From test plan reviews and on-site equipment calibration to real-time negative pressure monitoring and precise pressure-holding duration recording, project managers and supervision engineers collaborated closely to verify every weld, eliminating potential risks and ensuring data accuracy.
The successful completion of vacuum testing marks a critical milestone, confirming the construction quality of the storage tanks and laying a solid foundation for the project's timely progress and future safe, efficient operation.
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