Here are some “official” accident facts from OSHA regarding fatal accidents involving Anhydrous Ammonia (all but 1 of the accidents involves Anhydrous NH3). These incidents can be found in OSHA’s Accident Database, but all the accident info is provided below. I have scrubbed company names from this posting, as this is meant to be a LEARNING OPPORTUNITY not a shaming event! I was surprised at the number of pressure vessel failures that had occurred since 1984! Here are the OSHA summaries: