Recent Blog Posts

Purpose, Scope, and Applicability (IIAR 6, Part 3)

September 17th, 2019

Chapter 1 of ANSI/IIAR 6 Standard for Inspection, Testing, and Maintenance of Closed-Circuit Ammonia Refrigeration Systems addresses the Purpose, Scope, and Applicability of the standard. According to §1.1, the purpose of IIAR 6 is to specify “minimum requirements for inspection, testing, and maintenance for closed-circuit ammonia refrigeration systems”. Notice that there are no qualifiers for […]

IIAR 6 Overview (IIAR 6, Part 2)

September 3rd, 2019

Similar to other IIAR standards, ANSI/IIAR 6 Standard for Inspection, Testing, and Maintenance of Closed-Circuit Ammonia Refrigeration Systems is divided into several Parts, with each Part containing multiple Chapters or Appendices. Parts 1-2 are normative, indicating that the content in these sections is mandatory. Part 3 is informative and therefore intended to be descriptive and […]

It’s Finally Here! (IIAR 6, Part 1)

August 20th, 2019

We’ve often heard the axiom that “patience is a virtue”. For the ammonia refrigeration industry, our patience has finally been rewarded with the publication of ANSI/IIAR 6 Standard for Inspection, Testing, and Maintenance of Closed-Circuit Ammonia Refrigeration Systems. By some estimations, IIAR 6 has been in development for over 13 years[1]. Countless IIAR Standards Committee […]

ANSI/IIAR 6-2019 Inspection, Testing, and Maintenance of Closed-Circuit Ammonia Refrigeration Systems is Published

June 18th, 2019

ANSI/IIAR Standard 6-2019 Inspection, Testing, and Maintenance of Closed-Circuit Ammonia Refrigeration Systems was officially published on May 20, 2019. Bulletins 109 and 110, the IIAR’s previous guidance documents, are now officially retired in lieu of the long-awaited IIAR 6 standard. Gone are the days of “could” and “should”; this standard provides the minimum safety criteria for maintaining […]

Ammonia Diffusion Tank Water Sampling

June 11th, 2019

Many refrigeration systems installed in California are equipped with a diffusion tank which is designed to receive and mitigate ammonia vapor that is released when a relief valve lifts. Since the common application of diffusion tanks has been limited to the west coast, our industry lacks best practices for sampling diffusion tank water for the […]