The IIAR* pipe marking standards were created for marking and identifying ammonia pipes.
This concise one-page guide summarizes the requirements that need to be meet when labeling ammonia
pipes based on the IIAR standards.
For example, each pipe marker uses three colors to identify whether it is a high or low
pressure pipe; whether the ammonia is liquid or vapor; and yellow is used as the main background color.
*This pipe marking guide is based on the International Institute of Ammonia Refrigeration (IIAR) standards.
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