X60钢在输氢管道中应用的安全性分析OA

With the rapid development of the hydrogen energy industry,pipeline transportation has become a core method for large-scale hydrogen delivery due to its cost-effectiveness,making its full life cycle service safety particularly critical.By comparing the design philosophies of relevant domestic and international standards,the differences between the deterministic design approach and the performance-based design approach are highlighted.Due to the lack of long-term engineering validation for high-grade materials above X60,girth welds are a weak link in hydrogen embrittlement prevention,necessitating the establishment of a systematic control framework.Focusing on the applicability of medium-to-low-grade pipeline steels in pure hydrogen environments,API 5L X60 welded pipes as the research subject primarily examined.Through a combination of theoretical analysis and laboratory hydrogen compatibility tests,pipeline safety assessments were conducted.The findings indicate that although material plasticity declines significantly in hydrogen environments,performance requirements can still be met within the current standard framework,with hydrogen embrittlement-induced failure risks being manageable in engineering applications.Additionally,domestically produced hydrogen-resistant X60 steel and its welded joints exhibit fracture toughness(KIH)exceeding standard thresholds in high-pressure hydrogen environments,along with ample fatigue life,meeting performance-based design requirements.The research results provide theoretical foundations and data support for material selection,safety design,operation and maintenance management of hydrogen pipelines,advancing hydrogen pipeline network technology toward safer,more economical,and scientifically sound development.