我国”能源“大动脉”工程迎重要节点 “全国一张网”建设再提速

Core Viewpoint - The successful commissioning of the Turpan to Zhongwei section of the West-to-East Gas Transmission Project Line 4 marks a significant advancement in China's energy infrastructure, enhancing the reliability and flexibility of the national gas supply network [3][5][7]. Group 1: Project Overview - The West-to-East Gas Transmission Line 4 spans 1,745 kilometers, with a pipeline diameter of 1,219 millimeters and a design pressure of 12 MPa, capable of an annual gas transmission capacity of 15 billion cubic meters [5]. - This new line will operate in conjunction with Lines 2 and 3, improving the energy corridor in Northwest China and facilitating the transport of gas from Central Asia and Xinjiang to the Bohai Rim, Central, and Southeast coastal regions [5][7]. Group 2: Strategic Importance - The West-to-East Gas Transmission Line 4 is part of China's major natural resource allocation projects, alongside the South-to-North Water Diversion, West-to-East Power Transmission, and North Coal South Transport initiatives [9]. - The project enhances the gas supply system's capacity, providing stable supplies of clean natural gas to surrounding areas, which is crucial for optimizing regional energy structures and improving air quality [7][9]. Group 3: Technological Innovations - The project features significant technological advancements, including the use of 18-meter long pipes, the development of 33-millimeter thick high-strain steel pipes, and the application of automated welding and digital radiographic testing techniques [9]. - Upon completion, the annual gas transmission volume is expected to reach 15 billion cubic meters, replacing over 27 million tons of standard coal and reducing carbon emissions by approximately 50 million tons [9].