In all my Process Safety courses, we discuss the key RAGAGEPs for Primary Containment (ASME B31.3, ASME Section VIII, etc.). I am always taken aback by how many safety professionals tasked with managing PSM/RMP-covered processes know so little about these critical standards. I am not teaching them to be piping or pressure vessel SME’s; but enough to know what should be happening during their installation/field erection. One of the phrases I learned and stuck in my head in a 1994 training course was “Three-Threads Showing“. It’s a catchy, easy-to-remember phrase that’s even easier to identify in the field. It plays a key role in flange and manway joinments. SAFTENG members can read the dozen or so articles I have written about this topic, or the AICHE CCPS Beacon from 2012. But for those who say this phrase is outdated and has no place in process safety, I wanted to share with you a case where an organization was actually cited for the “three threads showing.