The ammonia refrigeration process has seen little change since the early 20th century. Exposure to 300 ppm is immediately dangerous to life and health. However, the danger always exists that exposure will occur due to a leak or catastrophic release of Anhydrous Ammonia from a refrigeration system. A release of Anhydrous Ammonia could happen in a number of ways: physical impact to the refrigeration system, seal leaks, piping corrosion, and hydraulic shock. The odor of ammonia is widely recognized. Ammonia is classified as a Water Hazard Class 2 substance. Ammonia, frequently used commercially in large freezing and refrigeration plants is also called “anhydrous ammonia” because it contains almost no water (it is 99.98% pure). There are certain risks resulting from ammonia for refrigeration systems. Problematic procedures may be to blame. As a refrigerant, ammonia has four major advantages over CFCs and HCFCs: Sometimes called ammonia regenerators, can be integrated directly into the refrigeration system. Ammonia refrigeration is commonly found in cold storage, food processing and industrial applications, but the use of ammonia does extend into other markets as well, especially overseas. Household ammonia, by comparison, is only about 10% ammonia by weight mixed with water. Concerns, Cautions and Considerations. The odor threshold reported in literature varies. Any business operating a chiller with ammonia is … Region III has conducted more than 135 chemical safety audits from 1995 to the present of both large and small facilities using ammonia for refrigeration. It is used to create a cool environment that helps keep products fresh and prevent bacterial growth. This means that, if released, ammonia can be a danger to the immediate environment. in the workplace. In addition, over the past 2 years, Region III has Refrigerant grade anhydrous ammonia is a clear, colorless gas or liquid and about 99.95% pure. With ammonia, because fewer pounds of refrigerant are required to do the same amount of work, generally speaking, the lower a facility’s temperature requirements, the more cost-effective ammonia becomes. Ammonia is considered a high health hazard because it is corrosive to the skin, eyes, and lungs. While ammonia’s benefits are numerous, its dangers cannot be trivialized. The Dangers of Ammonia. Typically use hot discharge gas or warm condensed liquid to provide an inexpensive heat source for boiling the cold contaminated liquid ammonia. The true danger from ammonia occurs when a person is unable to leave a gaseous ammonia environment, and when the liquid comes in contact with the body, particularly the eyes. 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