西气东输三线在建工程全线投运 从"线"到"网" 筑牢国家能源安全屏障

Core Viewpoint - The completion of the Zhongwei to Zhaoyang section of the West-to-East Gas Pipeline Phase III significantly enhances natural gas supply capabilities in China's central and eastern regions, marking the full operation of the pipeline's construction [1][3]. Group 1: Project Details - The Zhongwei to Zhaoyang section is a core segment of the West-to-East Gas Pipeline Phase III, with a total length of 1,235 kilometers, a design pressure of 10 MPa, a diameter of 1,219 mm, and an annual gas transmission capacity of 25 billion cubic meters [3]. - This pipeline connects Ningxia and traverses five provinces (Gansu, Shaanxi, Henan, Hubei), further extending the gas supply to regions such as the Yangtze River Delta, Pearl River Delta, Bohai Rim, and Sichuan-Chongqing area [3]. Group 2: Strategic Importance - The project is a critical link in the national gas network, alleviating the high-load operation of the first and second phases of the West-to-East Gas Pipeline and facilitating the export of increased production from western oil and gas fields [3][5]. - The completion of this section optimizes China's energy transmission structure, ensures regional energy supply, and promotes economic development in central and eastern China [5]. Group 3: National Energy Network - With the full operation of the West-to-East Gas Pipeline Phase III, the national gas backbone network, which includes the first, second, third, and fourth lines, becomes increasingly complete, reinforcing the country's energy security [5]. - The West-to-East Gas Pipeline system, along with other major projects, plays a vital role in the cross-regional allocation of natural resources in China, having achieved an annual gas transmission volume exceeding 100 billion cubic meters and a cumulative transmission volume surpassing 1 trillion cubic meters [7]. Group 4: Environmental and Economic Impact - The West-to-East Gas Pipeline system covers over 400 cities and more than 3,000 medium and large enterprises, benefiting nearly 500 million people, thus contributing to the improvement of energy structure and ecological environment in China [7]. - The pipeline system is essential for the development of domestic gas and the integration of imported gas, facilitating the transition to a cleaner and low-carbon energy structure [9].