This is an update to a blog that was originally posted on 8/4/15. You can read the original blog here. Most people who have worked around the ammonia refrigeration industry for any period of time recognize the importance that strainers play in the proper operation and maintenance of an ammonia refrigeration system. Typically located upstream […]
This is an update to a blog that was originally posted on 10/14/14. You can read the original blog here. Question: What is the proper procedure for selecting the pressure relief valve capacity for a positive displacement compressor? Answer: ANSI/IIAR 2-2021 §8.2.2.2 addresses this very question. Furthermore, Appendix E (Informative) of that same document gives […]
Summary In May 2019, ammonia began leaking from a suction regulator installed on the roof of a facility. The incident resulted in seven reported injuries and one fatality. The leak calculations determined that approximately 12 lbs of ammonia was released before the valve was isolated. Incident Description One of the eight bolts holding the suction […]
This is an update to a blog that was originally posted on 6/13/17. You can read the original blog here. Relief System Design and Design Basis is one of the most commonly inspected components of Process Safety Information (Title 8 CCR §5189(d)(3)(A)(4) and Title 29 CFR §1910.119(d)(3)(i)(D)). This documentation, when prepared correctly, will describe the […]
Summary In August 2023, the catastrophic failure of a nurse tank containing anhydrous ammonia resulted in the release of all the ammonia contained within the tank. Incident Description The nurse tank was sitting stationary in a farm co-op lot when the tank failure suddenly occurred. According to the report, “The failure caused the tank shell […]
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