Core Viewpoint - The successful completion of the water pressure test for the first LNG storage tank (No. 3) at Zhejiang Energy Zhoushan Liuhong LNG receiving station confirms the safety and sealing performance of the tank structure, meeting design standards [1] Group 1: Test Details - The water pressure test, referred to as a "water injection health check," aims to verify the liquid tightness of the inner tank welds and the load-bearing capacity of the tank foundation, which are critical for the safe storage of low-temperature LNG [1] - The test utilized seawater as the testing medium, with a water height of 23.04 meters and a total water volume of approximately 140,100 cubic meters, equivalent to about 56 standard swimming pools [1] Group 2: Safety Measures and Technology - To ensure the smooth execution of the test, the project team developed a specialized plan, conducted multiple rounds of technical briefings, and systematically eliminated safety hazards [1] - The innovative use of a digital twin measurement system, combined with high-precision radar level gauges and 3D modeling technology, enabled real-time millimeter-level visualization monitoring of the tank's liquid level changes [1] Group 3: Test Results and Quality Control - The test results met all standards, confirming the reliability of the foundation and pile quality, with excellent performance in the inner tank welding results: radiographic testing at 99.80%, penetrant testing at 99.99%, and spectral testing at 100% [1] - According to the evaluation by CNOOC Quality Supervision Station Bohai Branch, the welding process of the tank is advanced, with high-quality materials and strict quality control, achieving a first-pass qualification rate at the domestic advanced level [1]