Recent Blog Posts

Permissible Locations of Ammonia Refrigeration Equipment

May 12th, 2020

ANSI/IIAR 2-2014 Addendum A Chapter 4 Location of Ammonia Refrigeration Machinery, prescribes the acceptable locations for installing ammonia refrigeration equipment. In general, it is expected that equipment will be installed inside a machinery room, but four alternatives are permitted. Exception 1 – Listed Equipment 4.2.1 allows listed equipment containing not more than 6.6 lbs of ammonia […]

Replacing Missing or Illegible Nameplates

April 28th, 2020

Occasionally, nameplates on ammonia refrigeration vessels become illegible or detached altogether. Does this mean the vessel must be replaced? Can a replacement nameplate be installed? If I have a photo of the old nameplate, is that sufficient? Do I need to contact a regulatory agency? These are just some of the questions that you may […]

IIAR Publishes an Update to the Standard for Startup (ANSI/IIAR 5-2019)

April 14th, 2020

IIAR recently published an update to the standard for startup of an ammonia refrigeration system. ANSI/IIAR 5-2019 Startup of Closed-Circuit Ammonia Refrigeration Systems is the second edition of this important standard which was first published in 2013. While the scope of the standard has not changed since the first edition, there are several noteworthy changes […]

Checklists: B109 vs. Appendix B (IIAR 6, Part 16)

March 31st, 2020

IIAR Bulletin No. 109 (B109) has been an integral part of ammonia refrigeration vernacular for over 20 years. “B109s” have been the gold standard for annual mechanical integrity inspections since the document was published in 1997. The ten easy to understand checklists which comprise most of the document have served our industry well during this […]

Relief Valve Replacement vs. Bench Testing (IIAR 6, Part 15)

March 17th, 2020

Replacement of pressure relief valves (PRVs) every five (5) years has long been established as RAGAGEP in industry documents (IIAR Bulletin No. 109 and No. 110) and manufacturer literature. ANSI/IIAR 6-2019 §13.1.2 introduces an alternative for owners that desire to increase the service life of their PRVs. The alternate test method can extend the service […]