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June 17, 2020

Low temperature failure incident

Three nozzles on top of a reactor suffered cracks in the welds during decommissioning of a high-pressure lube oil hydrogenation unit when it inadvertently discharged liquid nitrogen into three reactors. Excessive shrinking occurred, caused by thermal shock.
Damage that occurred to equipment is estimated to be approximately US$55,000 (1999).
Source:IChemE

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