Recent Blog Posts

P&ID (Piping & Instrumentation Diagrams)

January 24th, 2023

Check out Resource Compliance’s free video on P&ID (Piping & Instrumentation Diagrams).

IIAR 2-2021: Emergency Pressure Control Systems

May 3rd, 2022

In the 2008 edition of Standard 2, IIAR first addressed the topic of emergency pressure control systems (EPCS). Prior to the publication of ANSI/IIAR 2-2021 earlier this year, each subsequent publication of Standard 2 has offered commentary on the subject of EPCS in an informative appendix. ANSI/IIAR 2-2021 §15.6 is the first instance of EPCS […]

IIAR 2-2021: Eyewash and Safety Showers

April 19th, 2022

It has been a year and half since we last addressed eyewash and safety showers on our blog. With the publication of ANSI/IIAR 2-2021 it is prudent to examine the latest design requirements for these important safety units at ammonia refrigeration facilities. Summary of requirements in ANSI/IIAR 2-2014 Before looking at the 2021 edition of […]

RAGAGEP: Historical Variants and the Importance of IIAR Standards | Part 2: Defining RAGAGEP and Historical Perspectives

January 25th, 2022

Uriah Donaldson, OHST, presented a technical paper at the 2019 RETA National Conference and 2021 IIAR National Conference titled RAGAGEP: Historical Variants and the Importance of IIAR Standards.  This is the second post in a series of blogs which include excerpts from his technical paper.  Defining RAGAGEP and Historical Perspectives The notable origin of the acronym RAGAGEP […]

Calculating Threshold Quantity for Chemicals with Concentration Qualifiers

November 30th, 2021

Title 40 CFR §68.130 contains the table of RMP chemicals and their corresponding threshold quantities. Of the seventy-seven substances listed, four contain a concentration qualifier: Ammonia (conc 20% or greater) Hydrochloric acid (conc 37% or greater) Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) Nitric acid (conc 80% or greater) What does the concentration qualifier mean? […]