Two mechanics/operators working for a company whom uses ammonia as a refrigerant had a close call back in 2011. State OSHA in Washington (Washington State Department of Labor & Industries) released a picture podcast on the accident. Trent Elwig of WA state department led the investigation and give us great insight to the accident and and lessons learned. Lack of adequate training on the 3-ways and relief valves was the root problem in the investigation. Operators/mechanics spun off a live relief valve. Approximately 3,600 pounds were released and E-Stops were initiated. Ammonia sensors pegged out at over 4,000 ppm in the engine room. If it was not for the full face respirators this accident may have ended up in some fatalities.
Listen to the podcast by clicking this link
