Ammonia Marking Specifications
Pipe Markers | Pipe Marker Applications | Ammonia Pipe Marking
Anhydrous ammonia is most commonly used as a refrigerant in food and drink production sites. This includes: meat processing facilities, poultry and fish processing facilities, dairy and ice cream plants, juice and soft drink processing facilities, and wineries and breweries. Refrigerant grade anhydrous ammonia is a clear and colorless liquid or gas that is free from visible impurities. It is at minimum 99.95% pure ammonia. Water cannot have a content above 33 parts per million (ppm), and oil cannot have a content above 2 ppm. Preserving the purity of the ammonia is very important to guarantee a proper functioning refrigeration system.
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Anhydrous ammonia is considered a very high health risk that poses significant threat to those who work around it. It is corrosive to the skin, eyes, lungs, and can be deadly at elevated levels of exposure. It is also extremely flammable in high concentrations.
To reduce the risk of worker exposure and prevent accidents, both the ANSI A13.1 standard (used for non-ammonia piping), along with The International Institute of Ammonia Refrigeration (IIAR), require thorough and specific labeling of all pipes and ducts that contain ammonia-based refrigerants.
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The contents of a pipe is primarily identified by the textual information on a label. The label should provide the name of the contents of the pipe in an abbreviated form, with arrows indicating the directional flow of the contents. Identificaton of additional details of the hazard such as temperature, pressure, should also be included.
Labels have to be applied on any differing segment of a piping system, including pipes that change direction or pass through walls and floors. Labels must also be placed at regular intervals on long runs of straight pipe.
Non-Ammonia Pipe Marking: ANSI A13.1 requires a specified label lettering height depending on the outside diameter of the pipe it will mark. Any insulation and lagging should be included when determining the outside diameter. Lettering heights range from 1/2 inch for pipes with diameters that range from 3/4" to 1.25", up to 3-1/2 inches for pipes over 10" in diameter . DuraLabel offers the printers and supplies to fully comply with these ANSI pipe marking requirements.
