Failure analysis of a carbon steel pipeline exposed to wet hydrogen sulfide environment. (January 2017)

• Record Type: Journal Article
• Authors: Xu, Shugen; Huang, Shengjun; Guo, Deguo; Zhao, Yongjie; Song, Mingda
• Is Part Of: Engineering failure analysis. Volume 71(2017)
• Page Start: 1
• Page End: 10
• Publication Date: 2017-01
• Subjects: Wet hydrogen sulfide -- Welding residual stress -- Stress corrosion cracking -- Fuel gas pipeline; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2016.11.001
• Languages: English
• ISSNs: 1350-6307

Abstract

Abstract: Stress Corrosion Cracking (SCC) is one of the most common failure phenomena in the wet hydrogen sulfide environment. In this paper, the fracture failure of a fuel gas pipeline during operation has been analyzed. Through service environmental investigation, crack morphology detection, and stress analysis of fuel gas pipeline, the fracture has the morphology and characteristic of wet hydrogen sulfide SCC in the welding joint between pipeline and flange. The analysis shows that the abnormal martensitic microstructure in the pipeline has provided the advantage for SCC. Highlights: The reason on pipeline fracture is SCC generated in the welding joint zone. The SCC was induced by wet hydrogen sulfide. The high tensile stress in the weld is the stress factor of the SCC. The lath martensite in pipe provided convenience for the SCC.