2012年1月16日上午,特大型天然气管线工程——成都市绕城高速天然气高压输储气管线工程正式开工,其管道直径超过1m,为目前国内最大。该工程全长86km,环绕绕城高速外侧一圈,分南段、东北段、东段和东南段四期建设, On the morning of January 16, 2012, the super-large natural gas pipeline project-Chengdu Ring High-speed Natural Gas High-pressure Gas Storage and Transportation Gas Pipeline Project was formally started with a pipe diameter of more than 1m, making it the largest in China at present. The project has a total length of 86km and is surrounded by a circle around the outer ring of the expressway and is divided into four sections: south section, northeast section, eastern section and southeast section.