Recent Blog Posts

Pipe Plugs and Caps in Ammonia Refrigeration Systems

September 16th, 2025

Question: Are oil drain valves and service valves required to be plugged or capped when not in use? Answer: Yes. All shut-off valves connecting equipment or piping to the atmosphere must be plugged, capped, blanked, or locked closed when they are not in use. ANSI/IIAR 2-2021 §13.3.2.6 states “Shut-off valves connecting ammonia-containing equipment or piping […]

Provision for Refrigerant Removal

August 4th, 2025

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 […]

Determining Compressor Relief Valve Required Capacity

July 22nd, 2025

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 […]

Ammonia Week in Review | May 16, 2025

May 16th, 2025

Ammonia Travels The Globe in this week’s edition of the Ammonia Week in Review… Ammonia Gas Leak From Ice Cream Factory Triggers Panic in Mathura – Locals alleged that the leakage was ongoing for the last three days, but no action was taken. An 80-year-old woman was shifted to another house after she complained difficulty in breathing. […keep […]

Relief Valve Piping System Design Scenario

May 13th, 2025

This is an update to a blog that was originally posted on 1/24/17. You can read the original blog here. One often overlooked aspect of a relief valve discharge termination piping system is the scenario that was used as the basis of the piping design. Most designers understand that termination piping must be sized so […]