Threshold of Sulfide Stress Corrosion Cracking for L360 Pipeline Steel in Gathering and Transportation System in Puguang Sour Gas Field
摘 要
研究了L360MCS和L360QCS钢在普光气田集输系统中的氢渗透行为, 以及不同载荷水平下L360钢的断裂临界氢浓度。结果表明,L360MCS钢中可扩散氢质量浓度低于2.67 mg·kg-1时不易发生硫化物应力腐蚀开裂, 高于3.86 mg·kg-1为开裂危险区; L360QCS钢中的可扩散氢质量浓度低于2.93 mg·kg-1时不易发生硫化物应力腐蚀开裂, 高于4.41 mg·kg-1时为开裂危险区。结合氢探针技术对于现场在用管道氢浓度进行了测试和比对, 表明普光气田目前集输管道在正常工况下发生硫化物应力腐蚀的可能性较小。
Abstract
The hydrogen permeation behavior of L360MCS and L360QCS steels in Puguang gas field gathering and transferring system as well as the fracture critical hydrogen concentration of L360 steel under different load levels were investigated. The results showed that sulfide stress corrosion cracking seldom happened for L360MCS steel when diffusion hydrogen concentration was lower than 2.67 mg·L-1, above 3.86 mg·L-1 the cracking was danger. While for L360QCS, when diffusion hydrogen concentration was lower than 2.93 mg·L-1, sulfide stress corrosion cracking was not easy to occut, higher than 4.41 mg·L-1 the cracking was danger. Combined with hydrogen probe field tests and experiment results, it is found that under normal conditions in Puguang gas field, the sulfide stress corrosion of L360 pipeline steel is much less likely to occre.
中图分类号 TG172.9 DOI 10.11973/fsyfh-201508006
所属栏目 试验研究
基金项目 中国博士后科学基金(2011M501193); 河南省博士后科研启动基金(2010044)
收稿日期 2014/8/19
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备注张诚(1978-),工学博士,从事高含硫气田腐蚀与防护,
引用该论文: ZHANG Wen-chang,CHEN Wei-guo,ZHANG Cheng,ZHANG Wen-liang,OU Tian-xiong,LIU Dong-hui. Threshold of Sulfide Stress Corrosion Cracking for L360 Pipeline Steel in Gathering and Transportation System in Puguang Sour Gas Field[J]. Corrosion & Protection, 2015, 36(8): 721
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参考文献
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【7】张涛, 龙军, 孙新岭,等. 管线钢氢致断裂门槛应力与氢渗透的相关性[J]. 机械工业材料, 2003,27(10): 14-16.
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【10】曲文卿, 张彦华, 钟剑, 等. 含缺陷石油管道应力分析[J]. 焊管, 2002,25(4): 27-32.
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