此次投产的四川段全长约190公里，设计年输气能力200亿立方米。投产当日，来自四川威远、泸县等气田的天然 气平稳注入国家主干管网，将资源产区与消费市场紧密连接，为优化我国能源结构、服务经济社会高质量发展注入新 的动力。 四川段建设面临盆地复杂地形挑战，项目团队应用柔性内焊机、氩弧外根焊等山地全自动焊接先进设备和技术， 实现山区长距离管道连续铺设，焊口一次合格率达99.2%，在复杂地形条件下实现高标准建设。尤为引人注目的是， 该管段三座关键场站均采用先进的无人值守设计，标志着我国长输管道智能化建设水平得到进一步提升。 川气东送二线是"全国一张网"的重要组成部分，全线长约4269公里，途经四川、重庆、湖北、河南、江西、安 徽、浙江、福建8省市，于2023年开工建设，预计于2027年全线建成投产。全线贯通后，将与现有川气东送管道联合运 行，实现沿海液化天然气接收站与内陆管网的互联互通，成为服务长江经济带发展的重要能源通道，显著增强我国天 然气供应保障和应急调峰能力。（记者 李欣忆） 工作人员进行投产前检查。国家管网集团供图 12月29日，记者从国家管网集团获悉，国家"十四五"重大能源基础设施工程——川气东送二线天然 ...

Core Viewpoint - The Sichuan section of the "West-to-East Gas Transmission II" project has been fully put into operation, marking a significant advancement in China's natural gas pipeline construction and expanding the natural gas resource export channels in the Sichuan-Chongqing region [1][8]. Group 1 - The Sichuan section of the West-to-East Gas Transmission II project is approximately 190 kilometers long and has a designed annual gas transmission capacity of 20 billion cubic meters [1][8]. - The project connects natural gas production areas in Sichuan, such as Weiyuan and Luxian, to the national trunk pipeline network, enhancing the link between resource production and consumption markets [1]. - The project is part of China's major energy infrastructure initiative during the 14th Five-Year Plan, contributing to the strategic goal of a trillion cubic meter-level natural gas production base in the Sichuan Basin [3]. Group 2 - The construction of the Sichuan section faced challenges due to the complex terrain of the Sichuan Basin, but advanced technologies such as flexible internal welding machines and argon arc external root welding were employed to achieve a continuous pipeline installation [6]. - The project features unmanned design for key stations, indicating an improvement in the level of intelligent construction for long-distance pipelines in China [5]. - The entire West-to-East Gas Transmission II project spans approximately 4,269 kilometers and is expected to be fully operational by 2027, enhancing the interconnection between coastal LNG receiving stations and inland pipelines [8].

央视网消息：这两天，我国在水利、能源、交通等领域一批重大工程迎来关键进展，一起来感受我国经济活力。 黄河古贤水利枢纽工程导流洞贯通 12月28日，黄河古贤水利枢纽工程导流洞顺利贯通，标志着工程取得首个阶段性重大进展。古贤水利枢纽工程位于山西临汾，是黄河水沙调控 体系的关键性工程，建成后将显著提升防洪减灾能力。 国内首台30兆瓦级纯氢燃气轮机发电 12月28日，我国自主研发的国内首台30兆瓦纯氢燃气轮机实现纯氢发电。与同功率火力发电机组相比，该纯氢燃气轮机一年可减少碳排放超过 20万吨，一小时发电量4.8万千瓦时，可满足5500个家庭一天的用电需求。 广东阳信高速12月28日通车 12月28日，广东阳春至信宜高速公路正式通车。高速东起阳江阳春市，西至茂名信宜市粤桂交界处，全长近142公里。通车后，两地车程将从4 小时缩短至1.5小时，实现粤港澳大湾区与广西北部湾经济区快速互联互通。 长三角最深过江地铁隧道顺利贯通 12月27日，南京地铁4号线二期过江隧道顺利贯通。该隧道最低点位于长江水面以下68.58米，是长三角地区目前最深的过江地铁隧道。施工克 服了岩石强度高、刀具磨损严重、掘进效率受限等难题，标志着我国在城 ...

Core Points - The "Chuanqi Dongsong Phase II" natural gas pipeline project has successfully commenced gas transmission, adding nearly 3 billion cubic meters of natural gas annually, marking a significant acceleration in a major national energy infrastructure initiative [1] - The pipeline, which spans approximately 4,269 kilometers and passes through eight provinces, is a crucial part of China's energy strategy, enhancing energy structure optimization and regional economic development [1] - Once fully operational, the pipeline will have an annual gas transmission capacity of 20 billion cubic meters, facilitating interconnection with major national pipeline networks and addressing resource peak demand in central and eastern regions [1] Industry Insights - The AnYue gas field's gas can now be integrated into the national network via the Tongliang compression station, providing a new channel for gas export from the Sichuan-Chongqing region and supporting the rapid development of a 100 billion cubic meter gas production base [2] - The Sichuan Basin is a key area for natural gas production in China, with proven geological reserves of nearly 3 trillion cubic meters, and the pipeline plays a vital role in exporting gas resources from this region [2] - The National Pipeline Group is focused on enhancing the interconnectivity of southwest trunk pipelines, thereby improving gas source allocation and supporting the overall energy supply chain [2]

Core Viewpoint - The successful commissioning of the second line of the Sichuan gas eastward transmission project marks a significant advancement in China's energy infrastructure, enhancing natural gas supply capabilities [1] Group 1: Project Details - The newly commissioned pipeline is the first segment of the Sichuan gas eastward transmission second line, starting from the Anyue gas field in Ziyang, Sichuan Province, and ending at the Tongliang compressor station in Chongqing [1] - The total length of this pipeline segment is 56.15 kilometers [1] Group 2: Impact on Natural Gas Supply - The project is expected to add nearly 3 billion cubic meters of natural gas transportation capacity annually [1] - This development is part of China's "14th Five-Year Plan" for major energy infrastructure projects, indicating a strategic push towards enhancing energy security and supply [1]