Recently, the 174000 cubic meter large LNG transport ship constructed by China Shipbuilding Group Hudong Zhonghua Shipbuilding (Group) Co., Ltd. has been successfully delivered. This achievement marks an important milestone in the localization process of LNG ship construction and core supporting equipment in China.

This ship is the first large-scale LNG transport vessel in China to achieve full spectrum assembly of domestically produced ultra-low temperature valves for cargo hold enclosure systems. LNG transport ships are known as "super refrigerated vehicles at sea", with harsh operating environments. The ultra-low temperature valves on board need to withstand extremely low temperature conditions of minus 162 ℃ for a long time, while meeting strict technical indicators such as high airtightness, strong corrosion resistance, and high safety stability. They are the core components with extremely high technical barriers in the field of ship matching. Previously, the core ultra-low temperature valves of LNG ships have long relied on imports, becoming a key link restricting the independent development of China's LNG ship industry chain.

The localization and matching of all categories of ultra-low temperature valves used in the cargo hold enclosure system of the entire ship means that China has completely connected the key links in the entire process of special material research and development, product structure design, process manufacturing, complete machine assembly, and system matching. It has successfully built a complete independent industrial chain for large LNG transport ships from basic materials, core components to whole ship construction, and greatly improved the independent and controllable level of high-end ship equipment in China, laying a solid foundation for the large-scale and high-quality development of the domestic LNG shipping industry.

From the perspective of industry development, the large-scale landing of domestically produced ultra-low temperature valves on large LNG transport ships has profound demonstration and promotion significance for the domestic valve industry. On the one hand, ultra-low temperature valves for LNG ships belong to the category of high-end special valves. The batch application on board fully verifies the product performance, reliability, and manufacturing capabilities of domestic valves under extreme working conditions, marking that China's ultra-low temperature valve design and manufacturing technology has entered the international advanced level, breaking the monopoly pattern of overseas brands in the field of high-end marine low-temperature valves.

On the other hand, the demand for ultra-low temperature, high pressure, and high reliability special valves in the LNG industry, marine engineering, oil and gas storage and transportation, and other fields continues to rise. The breakthrough in the LNG matching market for ships will drive domestic valve enterprises to continuously iterate and upgrade in core technologies such as special material research and development, precision machining, low-temperature sealing, and working condition adaptation. At the same time, the mature experience of localizing LNG valves for ships can also radiate to related fields such as onshore LNG receiving stations, liquefaction plants, and long-distance pipeline networks, helping domestic valve enterprises expand their high-end application markets, promote the transformation of the entire valve industry towards high-precision, specialization, and complete sets, and accelerate the overall development of China's high-end equipment supporting industry towards self-reliance and self-improvement.