"The accident took place in July 2021 at the LyondellBasell Industries complex in La Porte, near Houston, in the acetic acid production unit. The facility is the third-largest acetic acid producer in the US. The CSB’s report found that the inadvertent removal of pressure-retaining components of a valve caused the release of nearly 75,000 kg of an acetic acid mixture. The incident killed two contract workers, severely injured a third, and sent some 29 others to hospital.
“Even a simple task can turn deadly if it is not performed properly,” CSB Chairperson Steve Owens says in a press release. The incident involved a common plug-valve system, and CSB found similar serious incidents in which these valves were taken apart when removing connected equipment."
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