Failure Analysis of Heat Exchange Tubes Based on Ansys Workbench

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Abstract

A number of tube leaks and fractures occurred on a heat exchanger used in a tar distillation unit after operation of only three years. In order to identify the cause of this failure, a fluid-structure interaction simulation using Ansys Workbench 13.0 was performed to calculate its state of real stress distribution. The result revealed that the tubes which were close to the hot oil inlet suffered from high tensile stress. At the same time, chlorine and sulfur element which were in the cold water and hot oil respectively had corrosive effects to the tubes. Finally, the morphological feature of fracture was studied. It was found that tube failure was mainly caused by stress corrosion cracking (SCC).

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	Articles by authors
	Wang Xiaojing
	Wang Lei
	Gao Weidong

Keywords： heat exchanger； tube failure； stress corrosion cracking； Ansys

Received 2013-08-16;

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Cite this article:

Wang Xiaojing, Wang Lei, Gao Weidong.Failure Analysis of Heat Exchange Tubes Based on Ansys Workbench[J] Chemcial Industry and Engineering, 2016,V33(1): 90-95

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