Significant changes to refrigerant container color protocol will commence in January 2020, as
outlined in the Air-Conditioning, Heating, and Refrigeration Institute’s (AHRI) Guideline N,
Assignment of Refrigerant Container Colors.
Guideline revisions, first published in 2015, specify that all refrigerant containers should have the
same paint color, RAL 7044, to reduce confusion among similarly colored refrigerant containers.
Preventing safety issues
“Misidentifying refrigerants can lead to serious safety issues because refrigerants have different
operating pressures and physical properties, including potential flammability,” said Helen Walter-Terrinoni, AHRI Vice President of Regulatory Affairs. “
It can also cause equipment damage if refrigerants are used in the wrong applications. The
updated guideline will ensure that refrigerants continue to be used correctly and safely.”
Measures of refrigerant identification
Guideline N previously stipulated that specific colors be used for refrigerant
containers as a means of identification
AHRI Guideline N previously stipulated that specific colors be used for refrigerant containers as
an additional means of refrigerant identification. However, with the increased number of
refrigerants approved for use and the respective increase in the number of colors assigned to
these refrigerants, there was concern over the potential misidentification of similarly colored
containers.
More than half of respondents to an AHRI survey of refrigerant users found that container colors
had confused. This confusion was likely to increase as new refrigerants are added to the market.
Identification through correct labeling
The U.S. Code of Federal Regulations (CFR) Title 49 for hazmat transportation regulations and
CFR Title 29 for occupational safety and health regulations require that all hazardous material
containers, including refrigerant cylinders and drums, be labeled to identify the contents.
These container labels and markings should always be used as the primary means of
identification for hazardous materials, including refrigerants.
Guideline N recommendationsAHRI will continue to assign PMS colors for printed materials only, including the label on
containers and the outer packaging of DOT39 cylinders, the guideline still requires that all
flammable refrigerants include a red band on the shoulder or top of the container. The changes
do not apply to products already packaged.
While AHRI Guidelines act as recommendations from industry and are not required by law,
virtually everyone in the industry adheres to Guideline N, and all users should be aware that the
cylinder and drum label or silkscreen will serve as the primary means of properly identifying the
type of refrigerant in a cylinder or drum.
As with all AHRI standards and guidelines, Guideline N is free to download from AHRI’s website.