Recent Blog Posts

IIAR 6 Appendix B Pressure Vessels Checklist | Part 9

September 17th, 2024

Part 9: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. Item Q asks the inspector to verify that the sight glass is adequately protected from traffic, equipped with 360° guards, and configured with internal check valves if the glass breaks. […]

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 5

October 31st, 2023

Part 5: This is a continuation of our blog series explaining how to perform an IIAR 6 Appendix B inspection of an ammonia pressure vessel. Items B and C on Page 2 of the checklist ask if the vessel is suitable for ammonia and operating within limits. The inspector must verify that the vessel is […]