减顶二级抽空冷却器钩圈开裂原因分析  

Failure Analysis on Backing Device of Secondary Condenser Which is on Top of Vacuum Distillation Tower

作　　者：单广斌[1] 罗辉[2] 谢守明[1] 叶成龙[1] 刘小辉[1] 

机构地区：[1]中国石油化工股份有限公司青岛安全工程研究院,山东青岛266071 [2]中国石油化工股份有限公司荆门分公司,湖北荆门448039

出　　处：《压力容器》2012年第12期61-64,共4页Pressure Vessel Technology

摘　　要：对某公司减压塔顶二级抽空冷却器浮头钩圈失效问题进行了系统的分析与测试,结果表明,钩圈失效为湿硫化氢环境下的应力腐蚀开裂,Cl-的存在及晶间腐蚀促进了腐蚀开裂的发生。针对失效原因提出了相应的防治措施。A series of tests and failure analysis on the backing device of secondary condenser which is on the top of vacuum distillation tower were carried out and the results indicate that the failure of the backing device is due to SCC in wet hydrogen sulfide environment. CI- and intergranular corrosion promote the cracking. The proposed control measures are also listed.

关 键 词：湿硫化氢 失效分析 钩圈 

分 类 号：TH703.6[机械工程—仪器科学与技术] O346.2[机械工程—精密仪器及机械]