Safety Info Posts

The history of “weak seam welded roof” as a means of emergency venting atmospheric storage tanks

The concept of the weak seam welded roof—officially referred to in modern engineering standards as a frangible roof joint—has been a foundational safety mechanism for atmospheric storage tanks for over 90 years. NOTE: In 2015, NFPA 30 Section 22.7 was amended to eliminate the use of a weak roof-to-shell seam as an allowed means of

Failing to CLOSE a PRCS Entry Permit properly can have Process Safety implications months after the entry

As most of you know, PRCS Entry is one of the specific SWPs called out in the PSM and RMP standards. But many programs fail to meet 1910.146(f)(4), and a recent CSB accident report tied the requirement for canceling a permit to a catastrophic explosion event. 1910.119(f)(4) The employer shall develop and implement safe work

The 15-Year Service Life Debate for Composite Cylinders (SP 16320)

The most significant friction point involves PHMSA and SCBA Fully Wrapped Carbon-Fiber Reinforced (CFFC) aluminum-lined cylinders on Special Permit 16320 and the use of Modal Acoustic Emission (MAE) testing to extend the life of composite cylinders. Fully Wrapped Carbon-Fiber Reinforced (CFFC) aluminum-lined cylinders have a 15-year service life. PHMSA has investigated and granted limited special

Pipeline Safety & Potential Impact Radius (PIR) Re-evaluations

NTSB’s historical investigations into major gas and hazardous liquid pipeline ruptures continue to shape current rulemaking tracking. PHMSA has been actively reviewing the established Potential Impact Radius (PIR) calculation methodologies used in integrity management programs. The review aims to determine whether current mathematical models accurately account for human response data, rapid-ignition variables, and modern accident

FRC must be the outer layer – NYLON Hi-Vis vest are a problem

In today’s workplaces, it’s hard to find a large business that does not require Hi-Vis Vest/Workwear. What is not hard to find is a business with HAZLOCs where workers are required to wear FRC but are wearing nylon Hi-Vis vests OVER their FRC. I am all for making workers more visible to powered industrial trucks

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