en.Wedoany.com Reported - The Yingkou LNG storage tank project, constructed by CNNC Fifth Construction Co., Ltd. for CCCC, recently completed the nitrogen displacement and drying operation for the storage tanks, with all process indicators meeting standards. This marks the completion of key commissioning procedures before operation, laying the foundation for tank pre-cooling, system joint commissioning, and formal production.
LNG cryogenic storage tanks operate long-term in an ultra-low temperature environment of minus 161 degrees Celsius, requiring stringent standards for internal dryness, cleanliness, and inert protection. The nitrogen displacement operation deeply removes residual oxygen and moisture from the tank, preventing safety hazards such as low-temperature freezing blockages and equipment damage at the source, serving as a core critical process to ensure smooth tank startup and long-term safe operation.
During the operation, the project team adhered to party-building leadership to fortify the safety and quality defense line, establishing a "Party Member Commando Team." Party members took charge of key control points, employing an atmospheric pressure dilution displacement process, covering the tank space in a grid pattern through stepwise purging and tiered detection. Management personnel participated in full-process tracking, real-time monitoring of parameters such as oxygen content and dew point, comprehensively eliminating operational blind spots to ensure the displacement operation met compliance standards.
The successful completion of this milestone demonstrates CNNC Fifth Construction Co., Ltd.'s professional capabilities in the construction and commissioning of large-scale LNG storage tanks. In the next phase, CNNC Fifth Construction Co., Ltd. will continue to strictly control safety and quality standards, steadily advance subsequent finishing and commissioning work, and fully ensure the project is completed and put into operation as planned, supporting regional energy supply security and local economic development.
