Recent Blog Posts

IIAR 6 Appendix B Pressure Vessels Checklist | Part 8

December 13th, 2023

Part 8: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. Items M and N ask if the vessel certification drawings and manufacturer data report are on file. The data report, commonly referred to as a U-1 or U-1A form, we […]

IIAR 6 Appendix B Pressure Vessels Checklist | Part 7

November 28th, 2023

Part 7: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. Item I in the checklist inquires if the pipes are marked as required by IIAR Standard 2. Standard 2 requires piping mains, headers, and branches to be labeled with the […]

IIAR 6 Appendix B Pressure Vessels Checklist | Part 6

November 14th, 2023

Part 6: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. Item D requires the inspector to verify that supports and anchorage are adequate. For a ground-mounted pressure vessel, the anchorage should be inspected to ensure nuts are tight and free […]

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 […]