Journal of Failure Analysis and Prevention

, Volume 11, Issue 4, pp 363–371 | Cite as

Failures by SOHIC in Sour Hydrocarbon Service

Case History---Peer-Reviewed

Abstract

This article discusses two failures experienced in spiral-welded pipeline/piping due to stress-oriented hydrogen-induced cracking (SOHIC). The first identified SOHIC failure occurred in 1974, before the term SOHIC was coined. A second failure occurred in 1998 in the piping system handling aggressive sour natural gas liquid (NGL) service. The conditions leading to SOHIC failures and differences between the two failures are discussed. The influence of these failures on company standards is covered.

Keywords

Stress-oriented hydrogen-induced cracking Sour service H2Elemental sulfur Spiral-submerged arc welded pipe Longitudinal-submerged arc welded pipe 

Notes

Acknowledgments

The authors would like to acknowledge Schuler Cox for his extensive involvement in the failure analysis during his employment with Saudi Aramco. We thank the Ministry of Petroleum and Minerals and Saudi Aramco management for permission to publish this article.

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Copyright information

© ASM International 2011

Authors and Affiliations

  1. 1.Saudi AramcoDhahran HeightsSaudi Arabia
  2. 2.Saudi AramcoDhahran HeightsSaudi Arabia

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