由冶金部钢铁研究总院与延边朝鲜族自治州联合创办的我国第１座焊管无缝化钢管厂于１９９４年７月全线试轧成功，１２月通过部级鉴定。从而揭开了我国钢管工业发展史上新的一页。该厂位于联合开发署筹划的东南亚开发区中俄朝交界中国一侧的延边龙井市，由冶金部钢铁研究总院制 The first welded seamless steel pipe plant in China, co-founded by the Iron and Steel Research Institute of the Ministry of Metallurgy and the Yanbian Korean Autonomous Prefecture, was successfully tested on a rolling mill across the board in July 1994 and passed the ministerial level appraisal in December. Thus opened a new chapter in the history of China’s steel pipe industry. The plant is located in Longyan City, Yanbian, China, Russia and North Korea on the Chinese side of the Southeast Asia Development Zone planned by the Joint Development Agency. It is composed of the Central Iron and Steel Research Institute of the Ministry of Metallurgical Industry