Covers all stages before and after cavern leaching and after injection/withdrawal completion, with targeted testing of different components’ sealing performance

Uses industrial-grade nitrogen as the testing medium, safe, inert, and residue-free, meeting environmental requirements

Tests at 1.1 times the maximum operating pressure to simulate extreme working conditions and expose potential leakage risks in advance

Quantitative analysis based on both leakage rate trends and gas–water interface changes to scientifically evaluate sealing performance, ensuring reliable results