Question: What is the proper procedure for selecting the pressure relief valve capacity for a positive displacement compressor? Answer: ANSI/IIAR 2-2008 Addendum B §6.1.2.1 addresses this very question. Furthermore, Appendix E (Informative) of that same document gives a detailed example of one acceptable method for determining the proper capacity. A summary of the steps in Appendix […]
Question: I’ve heard that the ammonia pipe labeling requirements have changed. Is that true? Answer: Yes and No. It is true that IIAR updated Bulletin No. 114 Identification of Ammonia Refrigeration Piping and System Components in March 2014. The update includes a fundamental change that we will address in this blog. Before doing that, however, it is important that we unpack […]
There seems to be a lack of clarity regarding the frequency that Mechanical Integrity inspections must be performed on ammonia refrigeration systems and more specifically whether a 5-year MI inspection is required by the PSM regulation. Title 29 CFR §1910.119(j)(4)(iii) requires that “the frequency of inspections and tests of process equipment shall be consistent with applicable manufacturers’ recommendations and good engineering practices, […]
Question: Is ANSI/IIAR 2-2008 Equipment, Design, and Installation of Closed-Circuit Ammonia Mechanical Refrigerating Systems normative or informative? Answer: Normative. All sections within IIAR 2 should be considered normative unless it is specifically stated that the section is informative. The second paragraph on the first page of the document reads as follows: This standard includes both Normative (required) and Informative […]
Question: What is the most common OSHA citation? Answer: The International Institute of Ammonia Refrigeration publishes the Condenser each quarter. The May 2013 addressed this exact question in the IIAR Government Relations article on page 14. According to the article, from 2009 through 2012 the most cited OSHA standards were: Hazard Communication Electrical, Wiring Methods Lockout/Tagout […]
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