Stress Corrosion Cracking of a Vinyl Chloride Stripper Vessel

This article describes the findings of a detailed failure investigation on a UNS S32750 super duplex stainless steel vinyl chloride stripper vessel that experienced cracking at nearly half of the welds. The cracking was identified as Type A “active-passive” stress corrosion cracking, which initiated on the inside of the vessel at both the circumferential and longitudinal welds.

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