合成氨压力管线开裂失效及挠曲变形分析  

Failure Analysis for Cracking and Deflection Deformation of Pressure Pipe-line in Synthesis Ammonia Equipment

作　　者：潘建华[1] 陈学东[1] 范志超[1] 陈斌[2] 

机构地区：[1]合肥通用机械研究院国家压力容器与管道安全工程技术研究中心,安徽合肥230031 [2]中国石油天然气股份有限公司宁夏石化分公司,宁夏银川750026

出　　处：《压力容器》2009年第1期23-28,共6页Pressure Vessel Technology

基　　金：国家科技部“十一五”科技支撑计划(2006BAK02B02);国家863计划项目(2007AA04Z430);国际科技合作重点项目计划(2006DFB73000)

摘　　要：某公司合成氨装置转化炉与预转化炉之间的一段压力管线,在投用两年后在弯头与直管连接焊缝处发生开裂失效,并且这段压力管线中8根上集气管运行约3个月后端部发生了不同程度的挠曲变形。针对以上两种情况,对发生开裂的压力管线和发生挠曲变形的上集气管压力管线进行了详细的有限元计算和分析,了解管线发生开裂的缘故,查明管线发生挠曲变形的原因,提出改进的措施和建议,并得到了一些有意义的结论。Cracking happened in the welded seam between elbow and ascending pipe of a pressure pipe -line which have been used about two years, and deflection deformation of effusers belonging to the same pressure pipe -line were detected after three months. To get to the bottom of the failure cause of these two cases, this paper analyses the relative pressure pipe -line by using finite element analysis. The reasons causing cracking and deflection of the pressure pipe -line are found out and some useful conclusions are achieved.

关 键 词：压力管线 开裂失效 挠曲变形 有限元分析 

分 类 号：TQ055.8[化学工程] TQ050.2