外径1 422 mm的X80钢管材技术条件研究及产品开发

为了满足中俄东线天然气管道工程380×108 m3/a 超大输气量的要求，大口径、厚壁、高钢级钢管便成为了主要选择。为此，结合该管道工程用外径为1 422 mm 的X80 钢管材技术条件的研究制订过程，对国内外管线钢管技术标准进行了对比分析，同时对外径为1 422 mm X80 钢管材技术条件中的化学成分和止裂韧性等关键技术指标及制订过程进行了分析探讨，并对外径为1 422 mm X80 钢管的开发过程及产品性能进行了介绍。通过生产试制和产品检测，证明现有技术条件合理有效地解决了化学成分 控制、断裂控制、产品焊接稳定性等技术问题，不仅满足了工程要求，而且也适应生产情况，可以保障中俄东线天然气管道的本质安全。该研究成果可为中俄东线建设外径为1 422 mm X80 钢天然气管道提供技术支撑，同时对于其他天然气管道工程技术条件的制订也具有指导意义。

Technical specifications of the X80 large OD 1422 mm line pipes and the corresponding product development

The steel pipes with large diameter, thick wall and high steel grade are preferred to meet the requirements of extremely high gas transmission rate (380×108 m3/a) in the Sino–Russian eastern route gas pipeline project. In this paper, the technical standards of line pipes at home and abroad were comparatively analyzed after the research and formulation process of technical specifications of API 5L X80 line pipes (OD 1 422 mm) used in the above mentioned project was introduced. The key technical indexes such as chemical components, crack-arrest-toughness values, etc. and its formulation process were discussed. In addition, the development process and product performance of the X80 line pipes (OD 1 422 mm) were described. It is proved by trial production and product tests that using X80 line pipes (OD 1 422 mm) in this gas project is a rational and effective solution to the following technical issues such as chemical composition control, fracture control and welding stability maintenance. This type of line pipes are proved to not only meet project requirements, but suit for production cases. As a result, the safety of Sino–Russian eastern route gas pipeline will be guaranteed essentially. The research results in this paper provide a strong technical support for the application of API 5L X80 line pipes (OD 1 422 mm) in the Sino–Russian eastern route gas pipeline project, and play a guiding role in drawing up the technical specifications of other gas pipeline projects.