Part 4: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. The second page of the checklist contains twenty questions that should be answered ‘yes’, ‘no’, or ‘not applicable’. The wording of each question is such that a ‘yes’ answer is […]
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 […]
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 […]
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 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 […]
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