On August 6, 2025, with the first LNG ship smoothly transporting liquefied natural gas to the 7th LNG storage tank of the project phase III through the unloading arm, it marks the completion and operation of four 220,000 cubic meter LNG storage tanks in the project phase III of the ENN Zhoushan LNG receiving station project, which was invested by ENN (Zhoushan) Liquefied Natural Gas Co., Ltd. and EPC contracted by Xindi Energy Engineering Technology Co., Ltd. (hereinafter referred to as "Xindi Energy Engineering"). The annual turnover is expected to reach 10 million tons, greatly improving the emergency supply and seasonal peak shaving capacity of natural gas in the Yangtze River Delta region.
Built in 29 months, breaking the industry record for tank construction during the same period
The ENN Zhoushan LNG Receiving Terminal is the first large-scale LNG receiving terminal invested and developed by a private enterprise approved by the National Energy Administration. The project phase III of the project involves the construction of four 220,000 cubic meter LNG storage tanks.Construction of working piles of the tanks began on March 8, 2023, with a total construction period of 29 months, which was 4 months ahead of schedule and has broken the industry record for tank construction during the same period. It aims to create a exemplary project that is green, low-carbon, safe, reliable, efficient, and finely managed.
During the project construction process, the project team is guided by the goal of helping customers achieve early production and early returns. Through the engineering intelligence platform, the construction of the entire life cycle of design, procurement, construction, commissioning, and trial production are precisely controlled, achieving a visual management of safety, quality, and progress. The management is refined to the day, creating three major construction achievements of "zero safety accidents, zero major quality defects, and zero progress delays", providing a new paradigm for large-scale project construction.
In terms of safety management, the project has achieved over 5 million safe working hours and zero major accident rate. In terms of quality management, the one-time pass rate of key welding processes such as the 9% Ni steel wall panels inside the LNG storage tank, LNG tank pipe connections, and tank roof pipe has reached over 99%, far exceeding the original quality target of the project. In terms of progress management, the project team completed multiple milestones including foundation construction, outer tank wall construction, dome roof pouring, and mechanical completion ahead of schedule, continuously refreshing the project construction speed. In the pneumatic lifting operation, we innovatively adopted the dual technology engine of "digital monitoring system+ prefabricated aluminum ceiling technology", successfully achieving the "simultaneous lifting of three roofs" for 6 #, 7 #, and 8 # LNG storage tanks, creating a new record for large-scale LNG storage tank domes to be lifted simultaneously on the same day in China.
Innovative processes drive environmental protection and gain economic benefits for a win-win situation
To ensure the smooth production of the project phase III , the project team, with strong supports from the owner, efficiently integrated resources, led the formation of a professional trial production team, continuously refined and optimized the trial operation plan and related emergency plans, and invited industry experts to review and verify the plan, ensuring the overall safety and reliability of the plan. During the trial production process, the trial production team adopted an innovative BOG recycling process, significantly reducing the replacement time. This process combines environmental and economic benefits. On the one hand, it achieves "zero venting" throughout the tank pre cooling process, saving 1477.5 tons of LNG venting and creating a new benchmark for environmental protection. On the other hand, it has achieved 100% utilization and recovery of BOG gas, promoting the full conversion of resources.
Dual product delivery provides new energy infrastructure standards
In the construction process of the project phase III , Xindi Energy Engineering responded to customer needs, carried out forward digital design, and built a component level structured digital factory that is consistent with the physical factory, achieving synchronous delivery of "physical factory + digital factory" dual products and providing new standards for energy infrastructure construction.
Next, the company will continue to promote the construction of supporting facilities for the ENN Zhoushan LNG receiving terminal, and make every effort to ensure the early operation of the entire terminal, adding "confidence" to the energy supply of the East China and Southeast coastal areas!
