Recent Blog Posts

IIAR 6 Appendix B Pressure Vessels Checklist | Part 3

October 3rd, 2023

Part 3: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. The final information required on the first page of the checklist pertains to the vessel relief valves. The manufacturer, model, pressure setting, and capacity can be obtained from the relief […]

IIAR 6 Appendix B Pressure Vessels Checklist | Part 2

September 19th, 2023

Part 2: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. Page 1 of the pressure vessel checklist requires the inspector to indicate the application of the vessel. For example, if a high pressure receiver was being inspected, the corresponding box […]

IIAR 6 Appendix B Pressure Vessels Checklist | Part 1

September 5th, 2023

Part 1: This is the first in a series of blogs explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. The checklists contained in IIAR 6 Appendix B are derived from a legacy document named IIAR Bulletin No. 109. For years, the Bulletin 109 checklists, or B109s, served as […]

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 […]