Ammonia pipe supports are a crucial component to the construction of a refrigeration system. Inadequate pipe supports could lead to an ammonia release in the event of an earthquake, prolonged vibration, or physical impact. Many of IIAR’s standards and guidance documents provide helpful clarification regarding how ammonia piping should be supported and secured. Design of […]
Summary In June 2020, the failure of a bolt on the strainer cap for a compressor led to the release of 5,461 lbs of ammonia. One of the four bolts for the strainer cap had been broken for years. A second bolt broke during the incident as the compressor suction gasket failed. Incident Description When […]
Question: Does my machinery room need an emergency ventilation system if it only has three walls? Answer: It may not require mechanical ventilation and could meet the requirements for “Natural Ventilation”. ANSI/IIAR 2-2021 §7.3.2 states that for outdoor systems, natural ventilation can be utilized instead of mechanical ventilation. For a machinery room to qualify for […]
Summary In October 2017, an ammonia release inside a machinery room resulted in the deaths of three people – two city workers and one refrigeration technician. A pinhole leak developed in a shell and tube brine chiller, which allowed ammonia to leak into the brine solution. The leak was discovered, but due to a lack […]
Detection systems are a key player in the realm of process safety. Early detection and notification of an ammonia leak has the potential to save lives. In addition to ensuring that ammonia detectors are operating and maintained correctly, it is equally important from a regulatory perspective to ensure required parameters are met. A partial list […]
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