Core Viewpoint - The article highlights the successful development and approval of a large-capacity liquid hydrogen storage tank for deep-sea floating platforms by CNOOC Engineering, marking a significant advancement in offshore energy technology [1] Group 1: Product Development - CNOOC Engineering's special equipment division has received the Approval in Principle (AIP) certificate from China Classification Society (CCS) for its self-developed low-temperature liquid hydrogen storage tank [1] - This is the first large-capacity liquid hydrogen storage tank designed specifically for deep-sea floating platforms in China [1] Group 2: Technical Challenges and Solutions - The storage tank must ensure absolute safety under extreme conditions, including risks from ultra-low temperatures of -253°C, 12-level sea winds, high salt corrosion, and potential fatigue damage from liquid hydrogen movement [1] - The project team overcame multiple technical challenges by employing a multi-layer vacuum insulation structure and achieving an industry-leading evaporation rate of ≤0.5% [1] - The design includes a unique cross-wave barrier to effectively suppress liquid hydrogen movement, significantly reducing the risk of pressure surges under extreme conditions [1] Group 3: Future Plans - CNOOC Engineering plans to continue enhancing its technological capabilities and expand its "Qinghai" series products to support the development and comprehensive utilization of new offshore energy [1]