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[1]宁元星,刘翠伟,李玉星,等.长周期临氢服役管材适应性评价[J].油气储运,2024,43(10):1-14.
　NING Yuanxing,LIU Cuiwei,LI Yuxing,et al.Assessment of adaptability of long period serviced pipeline steel in hydrogen environment[J].Oil & Gas Storage and Transportation,2024,43(10):1-14.
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长周期临氢服役管材适应性评价

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年10期 页码: 1-14 栏目: 出版日期: 2024-10-25
Title:
Assessment of adaptability of long period serviced pipeline steel in hydrogen environment
作者:
宁元星; 刘翠伟; 李玉星; 宋明; 张慧敏; 陈曲儿; 朱梦泽; 彭世垚; 陈俊文
1.山东省油气储运安全重点实验室·中国石油大学（华东）；2.国家管网集团科学技术研究总院分公司；3.中国石油工程建设有限公司西南分公司
Author(s):
NING Yuanxing;  LIU Cuiwei;  LI Yuxing;  SONG Ming;  ZHANG Huimin;  CHEN Quer;  ZHU Mengze;  PENG Shiyao;  CHEN Junwen
1. Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety//China University of Petroleum (East China); 2. PipeChina Science and Technology Research Institute; 3. China Petroleum Engineering Co. Ltd. Southwest Company
关键词:
纯氢管道; 长周期; 适应性评价; 20钢; 大角度晶界; 氢陷阱
Keywords:
pure hydrogen pipeline;  long period;  adaptability assessment;  20 pipeline steel ;  high angle grain boundaries;  hydrogen trap
分类号:
TE832
文献标志码:
A
摘要:
【目的】随着氢能资源集中供给与市场需求的快速增长，利用长输管道实现大规模输氢因其可观的经济效益，成为未来氢能源供应的发展趋势。但在管道服役过程中，氢原子进入管线钢后可能诱发多种形式的氢损伤，从而导致管道失效,需评价长周期服役管材对氢的适用性。【方法】采用X射线衍射仪对服役管道内表面腐蚀产物进行分析，随后采用超声波与X射线数字成像对管段进行无损检测；结合电子背散射衍射分析，开展了气相原位氢渗透试验，考察了服役管材中的氢渗透行为；最后开展了不同掺氢比条件下的慢应变速率拉伸试验与疲劳裂纹扩展试验，分析了氢对服役20钢拉伸及疲劳性能的影响。【结果】服役20钢内表面存在腐蚀，腐蚀产物成分主要为氧化铁与四氧化三铁；由于服役管线压力波动较小，交变载荷作用不明显，服役管段未检测出缺陷波，无内表面裂纹或埋藏裂纹；晶粒尺寸较小，大角度晶界占比为91.7%，均匀分布的氢陷阱能够有效降低其氢脆敏感性。【结论】20钢在掺氢比为10%环境中的氢致脆化系数已超过25%，塑性性能明显劣化，大应力载荷条件下更容易发生氢致脆断，但其疲劳裂纹扩展速率在不同掺氢比环境中提升并不明显，且氢脆敏感性随掺氢比变化的敏感程度较低，在临氢环境中具有较好的抗疲劳性能。
Abstract:
[Objective]With the concentrated supply of hydrogen energy resources and the rapidly growing market demand, using long-distance pipelines to realize large-scale hydrogen transportation has become the future development trend of hydrogen energy supply as a result of its considerable economic benefits. However, during the service of pipelines, hydrogen atoms may induce many forms of hydrogen damage when they penetrate into the pipeline steel, resulting in pipeline failure. [Methods]In order to assess the applicability of long period serviced pipeline steel to hydrogen, the corrosion products on the internal surface of the pipeline were analyzed using X-ray diffractometry, followed by non-destructive testing of the pipeline segment using ultrasonic and X-ray digital imaging. In-situ gas phase hydrogen permeation tests were performed combining electron backscatter diffraction analysis to investigate the hydrogen permeation behavior in serviced materials. Lastly, the influence of hydrogen on the tensile and fatigue properties of serviced 20# steels was analyzed by slow strain rate tensile tests and fatigue crack growth tests in environments with different hydrogen blending ratios. The following are the results of the research. [Results]There were corrosions on the internal surface of the pipeline, and the corrosion products were mainly composed of ferric oxide and tri-iron tetroxide. Since the serviced pipeline pressure fluctuation is relatively small, the alternating load effect was not obvious, 20 pipeline steel section did not detect defective waves, without internal surface cracks or buried cracks. Serviced 20 pipeline steel has relatively small grain size with 91.7% of high-angle grain boundaries, and the uniform distribution of hydrogen traps could effectively reduce its hydrogen embrittlement susceptibility. [Conclusion]The hydrogen embrittlement coefficient of serviced 20 pipeline steel with a hydrogen blending ratio of 10% has exceeded 25%, indicating a significant deterioration of plastic properties, and hydrogen embrittlement fracture is more prone to occur under high stress loading. The fatigue crack growth rate of serviced 20 pipeline steel was not significantly increased in various hydrogen blending ratio. Hydrogen embrittlement sensitivity is less susceptible to changes in hydrogen blending ratio, and serviced 20 pipeline steel exhibits excellent fatigue resistance in hydrogen environments.

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备注/Memo

基金项目：国家重点研发计划氢能技术专项“中低压纯氢与掺氢燃气管道输送及其应用关键技术”，2021YFB4001605。
作者简介：宁元星，1996年生，博士研究生，现主要从事输氢管道接头安全方面的研究工作。地址：山东省青岛市黄岛区长江西路66号，266580。电话：17667515849。Email：ningwangwink@163.com
通信作者：李玉星，1970年生，教授，博士生导师，现主要从事油、天然气、氢气和二氧化碳管输技术方面的研究工作。地址：山东省青岛市黄岛区长江西路66号。电话：0532-86980919。Email: liyx@upc.edu.cn

更新日期/Last Update: 2024-08-21