Recent Blog Posts

Ammonia Week in Review | July 25, 2025

July 25th, 2025

Ammonia Repeats in this week’s edition of the Ammonia Week in Review… Minor Ammonia Leak Prompts Hazmat Response in Houlton – In an email, DEEP spokesman James Fowler said 10 to 15 workers were evacuated from the plant as a precaution due to an ammonia leak. He said no injuries were reported. […keep reading] Second Ammonia Leak in a […]

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 | June 27, 2025

June 27th, 2025

Ammonia Heats Up in this week’s edition of the Ammonia Week in Review… Ammonia Leak at Tuem Ice Factory Sparks Panic, Swift Response Averts Disaster – On reaching the site, firefighters detected ammonia gas—commonly used in ice manufacturing—spread across the area. […keep reading] Blythe Ammonia Leak Contained – Hazmat crews Friday are investigating an anhydrous ammonia leak that […]

PSI Explained: Relief System Design and Design Basis

June 24th, 2025

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 […]

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 […]