Hazardous Materials

“COLD” BLEVE caught on tape

Back in June of last year (2020), the city of Wenling in China experienced a tragedy that involved a COLD BLEVE of a flammable liquified pressurized gas tanker truck and a subsequent explosion killing 18 people.  We have dashcam footage of the COLD BLEVE and it is “textbook” footage of such an event – we…...

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FM Global completely re-writes the Engineering Data Sheet 7-78 Industrial Exhaust Systems

As you know, I am a huge fan of the FM Global Data Sheets and I still recommend them to all my clients.  If your business is too cheap to buy RAGAGEPs, these Data Sheets are by far your next best options as they are FREE.  And in some situations, I actually prefer the FM…...

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Fire Code, Building Code, Mechanical Code and Occupancy Classifications

When trying to assure that people will work in a safe environment, it is imperative to understand how a building is intended to be used. The code classification system for buildings is therefore based upon how the building is intended to be used. The safety of building occupants cannot be assured if only the construction…...

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When is a “gas detection” or “oxygen depletion alarm” system required?

We often get asked: Do I neet to install a gas detector in the room? Well, it’s pretty easy in my state, as in most cases we have dealt with, the state fire/HAZMAT code required it.  The code includes basic requirements for ALL gas detection systems and covers: construction documents, equipment, power connections, emergency and…...

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Thinking of buying a Hydrogen Powered vehicle?

A few years ago I was asked to participate in a hazard assessment for a manufacturer who wanted to review the procedure for hydrogen-powered vehicles to be freed of hydrogen gas.  I got the feeling very early into this hazard assessment that those in the room knew about an event of some type, but wanted…...

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Unloading hose(s) can eliminate the HAZMAT Attendance requirements

Years back a facility had to apply for a “Special Permit” (example of a permit at link) to get an exemption for their HAZMAT Attendance requirements and then it was very specific to the loading/unloading station and came with many caveats.  Now 49 CFR 177.834 has this exception built into the standard and it reads:…...

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Unloading HAZMATs with video monitoring and PSM/RMP

This past week I learned that what used to be allowed only under a “special permit” is now part of the regulation for unloading (and loading) HAZMATs.  It was very popular during my time as a safety/PSM manager and all my plants applied for and received the DOT Special permit(s) to unload both Railcars and…...

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Lists of Lists for “Highly Toxic” and “Toxic” hazardous materials (IFC, IMC, IBC)

I have always wanted to do this for my own use and over the pandemic, I took the time to compile a breakdown of some of the hazardous materials my clients have into Highly Toxic and Toxic so as to be clear which design requirements apply to which hazardous materials (HAZMATs).  For some of these…...

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How does the IFC and IMC classify Anhydrous Ammonia?

Anhydrous Ammonia is NOT a toxic nor highly toxic gas, as defined by the International Fire Code (IFC).  But if it is not managed as a “toxic,” how do we manage our ammonia gas? The IFC actually puts Anhydrous Ammonia in the…… Membership Required You must be a member to access this content.View Membership LevelsAlready...

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Classifying compressed gases for proper application of Codes (Chlorine and Phosgene)

I have been catching up on my Chlorine posts these last several weeks and some have asked me how I know which chemical goes into which hazard class; specifically, why Chlorine is “only toxic” and not “highly toxic”.  As I said in a few of my previous articles on safely managing Cl2, some of my…...

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OSHA’s Hydrofluoric Acid and Hydrogen Fluoride (HF) Program Directive

One of the top 5 nastiest checmicals I have encountered during my career is Hydrofluoric Acid and Hydrogen Fluoride (HF).  And it just amazes me that humans can convenience themselves that these chemicals are not “really that hazardous”.  TRUST ME (and NIOSH), HF has earned its place in my Top 5.  Of course, HF is not…...

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“Dust Off” and USCG required “Sound Devices” cans of compressed gas – Hazardous?

Authorities: Napa man injured by flash fire while cleaning paper shredderA man was hospitalized Saturday morning with a burn injury suffered while cleaning a paper shredder, according to Napa Fire.  Firefighters were called to a west Napa house at about 7:50 a.m., where a man was being cooled in a shower after suffering a burn……...

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