ANSI/IIAR2-2014 has been now what?

ANSI/IIAR2-2014 has been released…so now what?

The International Institute of Ammonia Refrigeration (IIAR) has been a major contributor of safe practices and design methodologies of ammonia refrigeration systems for many years.  Whether the IIAR likes it or not, they are viewed by many as a trusted group of industry professionals that are capable of establishing design and installation requirements of ammonia refrigeration systems. (Did I mention that Carlson and Stewart Refrigeration are IIAR members?)  Enter ANSI/IIAR2…

Since 1974, the IIAR has been publishing a version of “ANSI/IIAR2 – Standard for Safe Design of Closed-Circuit Ammonia Refrigeration Systems.”  Since then, many jurisdictions have adopted a version of this standard as code.  The IIAR may not have intended for this publication to be used in such a way, but it has happened whether they like it or not.

An operator or owner of a facility with ammonia refrigeration might think, “What standard(s) does the design of my ammonia refrigeration system conform to?” and “What standard(s) should the design conform to?”

Answer: (drum roll please) IT DEPENDS. 

Each jurisdiction (typically established by State boundaries) renews and adopts new codes on different cycles.  Once your jurisdiction’s cycle is complete code change can be considered.  It will be up to the jurisdictional assigned group to adopt ANSI/IIAR2-2014, adopt something else, or continue using what they have.

For example, the State of Minnesota (where Carlson and Stewart is headquartered) just recently renewed its acceptance of IIAR2-2008 with Addendums A & B as the High Pressure Piping code.  Minnesota’s code cycle is not subject for review again for another two years.  This means that although ANSI/IIAR2-2014 is available now, it is not considered the standard for design in Minnesota for at least another couple of years, and ammonia refrigeration designers and installers, such as Carlson and Stewart Refrigeration, need to continue to design to IIAR2-2008.

A word of caution: regardless of what jurisdiction you are part of, it is quite early for a system to be designed to ANSI/IIAR2-2014 standards.  If your refrigeration professional is suggesting that the 2014 edition is what should be followed, be wary and ask more questions.  There are likely no or few states that accept IIAR2-2014 yet as the code reference.  [Carlson and Stewart Refrigeration checked Minnesota and Wisconsin for code version reference at the time of this blog entry and they still reference IIAR2-2008.]