工程科学学报2016，Vol.38Issue(7)：952-957,6.DOI:10.13374/j.issn2095-9389.2016.07.009
管线钢在含氢气的煤制天然气中服役安全性评估
Safety evaluation of pipeline steels under SNG containing H2
摘要
Abstract
Synthetic natural gas ( SNG) is an important developing direction of the clean utilization of coal. The present pipeline steel may cause hydrogen-induced delayed cracking when used to transit SNG due to the hydrogen partial pressure in SNG perhaps up to 0. 72 MPa. Therefore, the safety assessment of pipeline steel for long-term service is very important and necessary. In this work, hy-drogen damage and hydrogen-induced delayed cracking in X-70 pipeline steel and 20 # steel at different hydrogen contents were studied by using autoclave constant load test and electrochemical hydrogen charging methods. The service safety of the steels in SNG was eval-uated. There is no hydrogen damage in the two kinds of steel after being placed in the autoclave in which the total pressure 12 MPa (10 MPa N2 + 2 MPa H2 ) is kept for one month. Hydrogen-induced delayed cracking does not occur in the U-bending specimen. And the constant load samples do not fail after they are kept at the yield stress for one month. The hydrogen content entering into X-70 and 20# samples is much lower than the threshold hydrogen content for hydrogen-induced delayed cracking and that for hydrogen damage. Therefore, both X-70 steel and 20# steel have high safety factors during the long-term service of transiting SNG.关键词
煤制天然气/管线钢/氢致延迟开裂/氢含量/安全系数Key words
synthetic natural gas/pipeline steel/hydrogen-induced delayed cracking/hydrogen content/safety factor分类
矿业与冶金引用本文复制引用
赵德辉,徐庆虎,崔德春,李金许,褚武扬,李强..管线钢在含氢气的煤制天然气中服役安全性评估[J].工程科学学报,2016,38(7):952-957,6.基金项目
国家重点基础研究发展计划资助项目(2014CB643301) （2014CB643301）
国家自然科学基金资助项目(51171024) （51171024）
