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(based on public references to IIAR standards): Iiar Ammonia Refrigeration Piping Handbook Pdf
: Critical safety guidelines for sizing and installing relief piping to protect the system from overpressure. Insulation the system does not deadhead.
Recognized and Generally Accepted Good Engineering Practice (RAGAGEP) Iiar Ammonia Refrigeration Piping Handbook Pdf
One of the most copied diagrams in industrial refrigeration comes from this handbook: the three-way dual relief valve configuration. The handbook details the required "bleed ring" and "vent line" sizing to ensure that when one relief valve lifts, the system does not deadhead.