Yes, we can absolutely max out the Maximum Allowable Quantities (MAQs) for multiple different hazard classes within a single control area and still avoid triggering a Group H (Hazardous) occupancy. However, there is also a major caveat regarding how those materials are categorized and whether they pose overlapping physical or health hazards. Here is how […]
5703.6.8 Piping supports have three (3) recognized methods to protect piping that may be exposed to a “pool fire”. First lets look at the code language: 5703.6.8 Piping supports. Piping systems shall be substantially supported and protected against physical damage and excessive stresses arising from settlement, vibration, expansion, contraction or exposure to fire. The supports
NFPA 496 (Standard for Purged and Pressurized Enclosures for Electrical Equipment) is one of the most powerful engineering tools available for hazardous locations, but it is also one of the most abused standards for HAZLOCs. Like the Combustible Gas Detection System (CGDS) provisions in NFPA 70, NFPA 496 allows a facility to install ordinary, non-classified
In NFPA 70 (National Electrical Code / NEC), the use of a Combustible Gas Detection System (CGDS) is a highly specialized engineering provision. It essentially acts as a “get out of jail free” card—or more accurately, a reclassification tool—for specific industrial locations. When you install a qualified CGDS, the NEC allows you to lower the
Auto-Refrigeration & Flashing and Cold Ambient Exposures We see around a half dozen pressure vessels in a “service” they were not initially designed for. There are literally hundreds of excuses as to why we find these issues, but they are simply excuses. It was not uncommon for us to find a PV in an NH3
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
In a recent case study, NIOSH researchers purchased hundreds of respirator components from major online marketplaces to test their performance, focusing on listings bearing “NIOSH” or “P100” markings from non-authorized sellers. The results show a severe influx of fraudulent PPE:
Based on recent updates from USCG and NFPA, we now know that two days after the incident, a marine chemist arrived on the scene in Alaska and tested the atmosphere of the barge involved in the accident. But the atmosphere therein had been sufficiently ventilated to allow firefighters to enter and recover the body of
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
OSHA’s regional emphasis programs continue to prioritize the programmatic elements of 1910.134. Citations in 2026 are frequently tied to “paperwork and protocol” failures rather than hardware failures:
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
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
