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March 10, 2021

INCIDENT #2 DUE TO CONNECTING BREATHING AIR HOSE TO NITROGEN

An employee was using an air hammer to chip residue out of a furnace at an aluminum foundry.He was wearing an air-line respirator. Two compressed gas lines with universal access couplings were attached to a nearby post. The one on the right was labeled “natural gas.” The gas line on the left had a paper tag attached with the word“air” handwritten on it; however, this line actually contained pure nitrogen. A splitter diverted one part of the gas stream to the air hammer and the other part of the stream to the air-line respirator.The employee was asphyxiated and killed when exposed to pure nitrogen.

Source:osha,gov

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