液氨外输管线阀门断裂原因分析  

Analysis of Valve Failure Installed on Liquid Ammonia Transportation Pipeline

作　　者：邹红伟[1] 吴万志[1] 彭树峰[1] 

机构地区：[1]大庆油田有限责任公司锅炉压力容器检验中心,黑龙江大庆163453

出　　处：《石油化工设备》2012年第5期101-103,共3页Petro-Chemical Equipment

摘　　要：针对某厂液氨外输管线阀门在运行过程中突然断裂,导致大量液氨泄漏的事故,通过对事故阀门进行宏观检查、化学成分检验、力学性能检测,分析了介质环境对阀门阀芯部位温差应力的影响。结果表明,在阀门原始铸造与设计存在缺陷的情况下,阀门不能承受内压、温度与外部载荷的综合作用而导致脆性断裂。According to sudden valve fracture during operation installed in the liquid ammonia pipeline, resulting in a large liquid ammonia leakage accident, the valve was inspected which in- eluded the following inspection： appearance inspection, chemical composition inspection and the mechanical properties examination. The medium environment influence of temperature stress on valve core part was analyzed. The results showed that, the valve could not bear the comprehen- sive function of inner pressure, temperature and external load and led to brittle fracture, because of original casting and design defects.

关 键 词：液氨管线 铸铁阀门 脆性断裂 温差应力 

分 类 号：TQ055.81[化学工程]