随着我国焊接技术的发展,在大口径高钢级的长输管道提高焊接效率和保障焊接质量方面,全自动焊技术是目前强力推行的长输管道焊接方式。但受限于设计理念、焊接装备能力、配套施工设备及工法等因素,国内还未在山区管道中应用全自动焊技术。国家管网集团西南管道公司组织设计单位、内焊机厂家、施工单位开展《山区管道全位置自动焊适应性研究》科研课题,着力提升山区管道的全自动焊技术。根据《山区管道全位置自动焊适应性研究》科研课题开题报告审查意见及计划任务书相关要求,为提高山区管道实施自动焊的比例,需从工程建设的源头设计进行优化,主要从设计工具升级后的精细化设计、限坡设计的选定线原则、施工断点优化、采取两段设计进行典型横面及纵断面设计、管材性能及几何尺寸优化设计、热煨弯管曲率半径优化等方面进行适应山区管道全自动焊的线路设计研究,为后续类似山区管道自动焊的线路设计提供借鉴。

With the development of welding technology, automatic welding technology is the technique at present to improve the welding efficiency and ensure the welding quality of large diameter and high steel grade long-distance pipeline. However, limited by factors such as design concept, welding equipment capacity, supporting construction equipment and construction method; the automatic welding technology has not been applied to pipelines in China's mountainous areas. For this purpose, PipeChina Southwest Pipeline Company organized design consultants, internal welding machine manufacturers and construction companies to carry out the scientific research project “Study on Adaptability of All-position Automatic Welding of Pipelines in Mountainous Areas”, focusing on improving automatic welding technology of pipelines in mountainous areas. According to the review comments on the opening report of the scientific research project “Study on Adaptability of All-position Automatic Welding of Pipelines in Mountainous Areas” of the national pipeline network; and the relevant requirements of the project plan tasks, it is necessary to optimize the engineering design in order to improve the proportion of automatic welding of pipeline in mountainous areas. The pipeline design for automatic pipeline welding in mountainous area is researched according to the refined design after the upgrading design tools, route selection principles for slope limiting design, optimization of construction break points, the adoption of two-stage design to carry out the typical transverse plane and longitudinal plane design, design optimization of performance of pipe materials and pipe geometry, and optimization research on radius of curvature of hot bends. The above aspects are documented in this paper. This study provides reference for the design of automatic pipeline welding of the same nature in mountainous area.