Journal of Failure Analysis and Prevention

, Volume 16, Issue 5, pp 770–782 | Cite as

Finite Element Analysis of Hydrogen Transport in Steel Pressure Vessel at High Temperature

Technical Article---Peer-Reviewed
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Abstract

Hydrogen embrittlement is commonly considered as an important failure mechanism for some typical steel pressure vessels and pipes made of such as Cr–Mo and 4130X steels at high-pressure hydrogen environment. In previous work, we investigated the hydrogen transport mechanisms of Crmo steel pressure vessels at room temperature. Furthermore, high temperature environment may affect the hydrogen transport mechanisms and hydrogen-induced crack behaviors in these structures to a large extent. In this paper, we study the hydrogen transport mechanisms in 2.25Cr–1Mo steel pressure vessel at high temperature under the support of National Key Fundamental Research and Development Project of China (2015.1-2019.12). The main work is to explore the effects of temperature, hydrogen concentration, and structural sizes on the transient hydrogen diffusion and distribution behaviors in Crmo steel pressure vessels using finite element analysis. Numerical results show that elevated high temperature accelerates the hydrogen embrittlement sensitivity, especially at structural discontinuities.

Keywords

Hydrogen transport High temperature Crmo steel pressure vessel Finite element analysis (FEA) 

Notes

Acknowledgments

All authors would sincerely appreciate the support of National Program on Key Basic Research Project of China (973 Program, No. 2015CB057601) and Fundamental Research Funding for the Central Universities in China.

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Copyright information

© ASM International 2016

Authors and Affiliations

  1. 1.Institute of Chemical Machinery and Process EquipmentZhejiang UniversityHangzhouChina

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