文献类型：会议论文

英文题名：Damage and cracking of hydrogenation pipelines suffered from thermal fatigue

作者：Wang, ZD; Zhu, KL; Wang, QQ; Xuan, FZ

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

会议论文集：Fracture Mechanics Symposium

会议日期：SEP 09-12, 2004

会议地点：Huangshan, PEOPLES R CHINA

语种：英文

外文关键词：hydrogenation plant; pipeline; stainless steel; failure analysis; wall-through crack; fracture appearance; finite element analysis; thermal fatigue

摘要：A failure analysis is carried out in this paper for hydrogenation pipelines to determine fracture mechanisms of triplet pipes suffered from the interaction of corrosion and thermal fatigue loading. Two cases of pipelines in a petrochemical plant are given to show the situation of converging fluid at main pipe of triplet by warm and cold lines. Two pieces of triplets taken from the pipelines respectively as samples for failure analysis are performed to investigate the materials' properties and fracture appearances. A finite element method is introduced to analyze the fluid velocity and temperature distribution of pipes. The results show that the main cause of failure is due to the alternative thermal stress produced by cold fluid entering main warm pipe with flesh hydrogen.