冷凝液汽提系统夹套管不锈钢内管开裂失效分析  

Failure analysis of stainless steel inner tube cracking in the jacketed pipe of condensate stripping system

作　　者：侯建琴 刘宝林 白学刚 刘畅[2,3] 宋策 HOU Jianqin;LIU Baolin;BAI Xuegang;LIU Chang;SONG Ce(SINOPEC(Tianjin)Petrochemical Co.,Ltd.,Tianjin 300271,China;China Special Equipment Inspection&Research Institute,Beijing 100029,China;Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment for State Market Regulation,Beijing 100029,China)

机构地区：[1]中石化(天津)石油化工有限公司,天津300271 [2]中国特种设备检测研究院,北京100029 [3]国家市场监管技术创新中心(炼油与化工装备风险防控)技术创新中心,北京100029

出　　处：《石油化工腐蚀与防护》2024年第4期59-64,共6页Corrosion & Protection In Petrochemical Industry

摘　　要：某化工企业甲醇中心净化装置冷凝液汽提系统夹套管不锈钢内管发生开裂泄漏,通过宏观观察、化学成分分析、力学性能测试、金相分析、硬度测试、能谱分析和断口扫描电镜分析等手段对失效原因进行了分析。结果显示:夹套管不锈钢内管力学性能不符合标准要求,且内部凹坑与裂纹均在酸洗前已存在,为原始制造缺陷。The stainless steel inner tube cracked in the jacketed pipe of condensate stripping system of methanol center purification unit in a certain chemical enterprise.The failure reason was analyzed through macroscopic observation,chemical composition analysis,mechanical performance testing,metallographic analysis,hardness testing,energy spectrum analysis and fracture scanning electron microscopy analysis.It was concluded that the mechanical properties of stainless steel inner tube in the jacketed pipe could not meet standard requirements,and internal pits and cracks already exist before acid washing,which were original manufacturing defects.

关 键 词：不锈钢内管 裂纹 失效分析 

分 类 号：TQ223.121[化学工程—有机化工] TQ055.81