掺氢天然气管道用钢力学性能劣化研究进展及建议  

Research status and suggestions of mechanical properties degradation of hydrogen-blended natural gas pipeline steel

作　　者：吴瑕[1] 滕孟君 贾文龙[1] 谭旻倩 WU Xia;TENG Mengjun;JIA Wenlong;TAN Minqian(Petroleum Engineering School of Southwest Petroleum University,Sichuan,Chengdu 610500,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《世界石油工业》2025年第2期110-119,共10页World Petroleum Industry

基　　金：国家自然科学基金项目“X70/X80钢掺氢天然气输送管道氢脆失效机理及安全服役能力研究”(52074238);国家自然科学基金项目“浸没式多频超声波空化清洗原油储罐沉积物的动力学机制及参数优化”(52274065);海关总署科研项目“管输进口天然气自动计量系统远程监控、风险预警及监管措施的研究”(2022HK077)。

摘　　要：为了探究天然气管道在掺氢输送工况下的持久耐用性与安全性,解决管道用高强度钢材在氢环境下因氢脆导致的力学性能劣化和低应力脆断失效问题,并为掺氢天然气输送管道氢脆失效机理及安全服役能力提供技术指导,开展了系统的调研与分析研究。调研掺氢天然气管道用钢力学性能劣化研究现状,对管道钢在电化学液相充氢、高压气相充氢两种不同条件下的拉伸性能、疲劳性能、断裂性能及其变化规律进行了归纳;梳理了现有主流氢脆理论的主要内容及适用范围,以及钢材渗氢劣化后的断裂失效预测模型。研究结果表明,在电化学液相充氢和高压气相充氢环境下,管道钢的力学性能呈现出特定的变化规律。不同充氢条件对管道钢拉伸、疲劳、断裂性能的影响存在差异。此外,现有主流氢脆理论在解释氢脆现象时各有其适用范围,钢材渗氢劣化后的断裂失效预测模型也为评估管道钢性能提供了一定的依据。结论认为,后续研究应聚焦于管道钢氢相容性力学测试、氢脆机理以及多尺度多维度含氢管道钢断裂失效预测模型等方向。该项研究成果有助于理解掺氢天然气管道的氢脆问题,可以为掺氢天然气管道安全、稳定、持久服役提供技术参考。In order to explore the durability and safety of natural gas pipelines under the condition of hydrogen-blended transportation,address the issues of mechanical property degradation and low-stress brittle fracture failure of high-strength steel for pipelines caused by hydrogen embrittlement in a hydrogen environment,and provide technical guidance for the hydrogen embrittlement failure mechanism and safe service capacity of hydrogen-blended natural gas transmission pipelines,this study conducts a systematic investigation and analysis.By researching the current situation of research on the mechanical property degradation of steels for hydrogen-blended natural gas pipelines,this study summarizes the tensile,fatigue,and fracture properties of pipeline steels under two different conditions:electrochemical liquid-phase hydrogen charging and high-pressure gas-phase hydrogen charging,along with their variation laws.Meanwhile,it reviews the main contents and applicable scopes of existing mainstream hydrogen embrittlement theories,as well as the fracture failure prediction models for steels after hydrogen-induced degradation.The research results show that under electrochemical liquid-phase hydrogen charging and high-pressure gas-phase hydrogen charging environments,the mechanical properties of pipeline steels exhibit specific variation laws.The impacts of different hydrogen charging conditions on the tensile,fatigue,and fracture properties of pipeline steels vary.In addition,existing mainstream hydrogen embrittlement theories have their respective applicable scopes in explaining hydrogen embrittlement phenomena,and the fracture failure prediction models for steels after hydrogen-induced degradation also provide a basis for evaluating the properties of pipeline steels.It is concluded that future research should focus on the mechanical testing of hydrogen compatibility of pipeline steels,the mechanism of hydrogen embrittlement,and the multi-scale and multi-dimensional fracture failure prediction models for hydrogen-containing

关 键 词：掺氢天然气 输送 管道钢 力学性能 劣化 钢氢相容性 氢脆 断裂失效 

分 类 号：TE973[石油与天然气工程—石油机械设备]