An investigation on corrosion failure of a shell-and-tube heat exchanger in a natural gas treating plant

被引：22
|
作者：
Panahi, H. [1 ]
Eslami, A. [1 ]
Golozar, M. A. [1 ]
Laleh, A. Ashrafi [2 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
[2] Pardis Petrochem Complex, Pars Special Econ Energy Zone, Asaloye 19675391, Iran
来源：
ENGINEERING FAILURE ANALYSIS | 2020年 / 118卷
关键词：
Amine; Cracking; Crevice corrosion; Shell-and-tube heat exchanger; TO-TUBESHEET JOINTS; CREVICE CORROSION; STAINLESS-STEELS; STRESS;
D O I：
10.1016/j.engfailanal.2020.104918
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This study investigates failure of a shell-and-tube heat exchanger used in a natural gas treating plant. The shell was made of carbon steel grade A516, while its interior wall was cladded by grade 304 stainless steel. Tubes and tube-sheet of the heat exchanger were made of grade 304L austenitic stainless steel. After almost 6 years of service, tube failure was observed adjacent to the tube-sheet, which caused gas leakage, and consequently an increase in internal pressure of the shell. Detailed examinations were performed on the failed tubes. Results showed that crevice corrosion formed within the gap between tube external surface and tube sheet, followed by subsequent cracking was the main cause of failure. Mitigation strategies were suggested for future failure prevention.
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页数：10
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