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New IIAR Standards Released

Uncategorized / May 21, 2021

The International Institute for Ammonia Refrigeration just released an updated version of ANSI/IIAR 2-2021 is a standard for the design of safe closed-circuit ammonia refrigeration systems.  It incorporates topics traditionally addressed in other codes and standards making it the single most comprehensive standard covering the safe design of closed-circuit ammonia refrigeration systems published to date. 

This new edition establishes IIAR as the ultimate authority regarding Ammonia refrigeration design and safety.

We’ve reviewed the updated standards and summarized everything you need to know about the new gas detection requirements. View and download your copy of CTI’s “Ammonia Gas Detection Codes and Specifications” booklet here. 

Some of the changes to this edition include: 
Clarification that existing facilities comply with IIAR 9; New definitions have been added; Requirements for eyewash/safety showers have been re-organized and clarified; Ammonia detection requirements have been changed; Changes to machinery room exhaust and ventilation have been updated based on new requirements; New requirements for Evaporators are included concerning design for freeze protection and design for frozen products; Inclusion of emergency pressure control systems where required by AHJs; New appendices include O. (Informative) Designing to Avoid Component Failure Caused by Abnormal Pressure or Shock, P.(Informative) Removal of Water from a Refrigeration System , and Q. (Informative) Guidelines for the Identification of Ammonia Refrigeration Piping and System Components.