抑制混氢输送管道氢脆的最低CO含量研究
Study on the lowest CO content to inhibit hydrogen embrittlement of hydrogen-blended gas transmission pipeline
浏览(607) 下载(22)
- 引用格式:
-
王琴,李文昊,伍奕,王文臣,谢萍,李小双,赵卫民.抑制混氢输送管道氢脆的最低CO含量研究[J].天然气与石油,2022,40(2):79-86.doi:10.3969/j.issn.1006-5539.2022.01.013
WANG Qin, LI Wenhao, WU Yi, WANG Wenchen, XIE Ping, LI Xiaoshuang, ZHAO Weimin.Study on the lowest CO content to inhibit hydrogen embrittlement of hydrogen-blended gas transmission pipeline[J].Natural Gas and Oil,2022,40(2):79-86.doi:10.3969/j.issn.1006-5539.2022.01.013
- DOI:
- 10.3969/j.issn.1006-5539.2022.01.013
- 作者:
- 王琴1 李文昊2 伍奕1 王文臣2 谢萍1 李小双2 赵卫民2
WANG Qin1, LI Wenhao2, WU Yi1, WANG Wenchen2, XIE Ping1, LI Xiaoshuang2, ZHAO Weimin2
- 作者单位:
- 1. 管网集团(新疆)联合管道有限责任公司, 新疆 乌鲁木齐 830013; 2. 中国石油大学(华东)材料科学与工程学院, 山东 青岛 266580
1. Pipe Network Group (Xinjiang) United Pipeline Co., Ltd., Urumqi, Xinjiang, 830013, China 2. College of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China
- 关键词:
- 氢;管线;X80钢焊缝;氢脆;CO抑制剂
Hydrogen; Pipeline; X80 steel weld; Hydrogen embrittlement; CO inhibitors
- 摘要:
- 在掺氢天然气的运输过程中,钢质管道的环境氢脆是工程安全管理必须解决的难题,而采用CO作为气体抑制剂可有效阻止管道氢脆失效。以X80管线中容易发生氢脆的焊缝作为研究对象,将N2替代CH4,在N2、N2+H2、N2+H2+CO等环境下进行慢应变速率拉伸试验,通过调整掺氢比和CO含量,计算获得了不同气体环境下的氢脆指数,在此基础上建立了不同掺氢比下的“氢脆指数—掺CO比例”数学关系曲线,以氢脆指数不超过10%作为管道安全运行临界值,建立了氢脆指数为10%时的“［CO］min—掺氢比”的数学关系曲线,为在役天然气管道混氢输送时规避氢脆失效提供安全指导。
In the process of hydrogen-blended natural gas transmission, the hydrogen embrittlement (HE) of steel pipeline is a problem to be solved in engineering safety management, and CO as a gas inhibitor can effectively prevent the HE-induced failure of the pipeline. As the dangerous area prone to hydrogen embrittlement in X80 steel pipeline, the weld was selected as the research object, nitrogen was used instead of methane, and the slow strain rate tensile tests were carried out under the environments of “N2”,“N2+H2” and “N2+H2+CO”. By adjusting the hydrogen and CO proportion, the HE index under different gas environments was calculated. Thereafter, mathematical relation model between the HE index and CO concentration was established under the different hydrogen proportion. Taking the HE index not more than 10% as the critical value of safe operation of the pipeline, the mathematical relation model between the minimum amount of CO addition and hydrogen proportion was established, so as to provide safety guidance for avoiding HE-induced failure in hydrogen-blended gas transmission pipeline.
