文献类型：期刊文献

中文题名：焦化脱硫装置富气压缩机出口管线开裂分析

英文题名：Cracking Analysis of Outlet Pipe of Rich Gas Compressor in Coker Desulfurization Unit

作者：刘小春[1];陈进[2];毛荷芳[2]

机构：[1]中国石化扬子石油化工股份有限公司,江苏南京210048;[2]华东理工大学化工机械研究所,上海200237

年份：2007

卷号：24

期号：5

起止页码：45

中文期刊名：石油化工腐蚀与防护

外文期刊名：Corrosion & Protection In Petrochemical Industry

语种：中文

中文关键词：管道;硫化氢;应力腐蚀;振动;失效分析

外文关键词：pipeline, hydrogen sulfide, stress corrosion, vibration, failure analysis

摘要：通过对焦化脱硫装置分液罐上截取的排污管和液位计接管进行宏观检验、硬度测试、金相检验、扫描电镜分析及腐蚀产物能谱分析,确定了富气压缩机二段出口管线开裂的原因。研究表明,管道内的环境属于硫化氢腐蚀环境,接管开裂的原因是由于焊接缺陷处的应力集中及管系振动引起的机械疲劳、硫化氢应力腐蚀开裂和腐蚀疲劳开裂。研究成果可以为类似环境下设备及管道的选材及焊接工艺提供参考。
The causes of cracking of outlet pipeline of rich gas compressor are pinpointed through macroscopic examination, hardness testing, metallographic analysis, scanning electron microscopy （SEM） of blow - down pipe section and connection pipe of level gauge of liquid separator and EDS of corrosion products in the desulfurization unit. The analysis identifies that, the internal corrosion environment is hydrogen sulfide corrosion, and the pipe cracking is the result of stress concentration at the weld defects, mechanical fatigue from pipeline vibration, hydrogen sulfide stress cracking and corrosion fatigue. The study results provide a good reference for the selection of materials and appropriate welding process for the piping and equipment for the similar services.