Flammable Liquids

LNG Piping Incident (an improperly isolated piping PRV)

On June 8, 2022, piping at an LNG Terminal failed, resulting in an explosion and fire.  The explosion and fire occurred entirely within the fenced boundaries of the facilities.  The facility immediately shut down its operations and notified first responders.  With assistance from local fire departments, the fire at the terminal was brought under control…...

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Understanding Table 5704.4.2 – Outdoor liquid storage in closed containers and portable tanks

Table 5704.4.2—Outdoor liquid storage in closed containers and portable tanks (see below) is often referenced when a business wants to store flammable liquids outside the main building. I wanted to take a second to explain the application of that table to those on the EHS team who may not be experienced with the OH Fire…...

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Visibly witnessing the MIE of LPG

Lots of folks find it hard to believe when I discuss Minimum Ignition Energy for flammable vapors/gases and Combustible dust. When we get “shocked” by a door handle in the wintertime, and we can feel it, that is around 10-15 mJ. Most common flammable gases and vapors now have MIE’s less than 1.0 mJ. Watch…...

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What is a “flash point”?

I teach about a dozen flammable liquid courses annually, and it is one of my favorite courses to teach, as I love the technical side of hazardous materials. And my course always starts with a discussion around the 1st step in making a flammable liquid a hazardous material… FLASH POINT. And over the 30+ years,…...

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Two (2) workers injured after HAND SANITIZER BOTTLES spark “minor explosion,” fire at waste facility

The investigation found that they were processing hand sanitizer bottles by shredding them and separating the plastic from the hand sanitizer. During this process, a spark was created from the machine, which initiated a minor explosion and fire. The business has refuted the fire chief’s official account, saying, “There was no explosion at the site.“…...

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Safety Cans vs Trash Cans

This week, I shared some pictures of a setup I encountered last year in an audit I conducted at a manufacturing facility. This sole department was using metal trash cans as ” safety cans,” while the rest of the facility was using FM/UL “approved safety cans” for their “dirty rags” storage. The sight of this…...

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Flammable Liquid tank HIT @ tequila plant (Video)

UPDATED 7/26/2024 with drone images, fatality count, and preliminary investigation findings Two (2) of the factory’s 219,000-liter (57,850-gallon) tequila vats ruptured, triggering a fire in three (3) other tanks. One 500,000 liters (132,086 gallons) suffered a HIT and traveled nearly 700′, landing in a residential area. The explosion within the plant killed seven (7) workers;…...

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Not all flammable solutions require us to establish HAZLOCs

Without question, the #1 question we receive regarding Hazardous Locations is… When do I need one?  With flammable liquids (e.g., FP<100F) it is easy to perform the evaluation.  But what if my flammable solution is a CAT 3 or 4 (i.e., Class IIIA or IIIB)?  As the title says, not all flammable solutions require us…...

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Residual FLAMMABLE VAPORS in PVC pipe cause explosion

On September 13, 2007, a subcontractor was implementing a hot tap into a carbon steel pipe. The explosion was caused by the heat from the acetylene torch kindling the residual vapor inside, attaching to the polyvinylchloride (PVC) piping. Shrapnel pieces were blown up to 100 feet outwards due to the force of the explosion. The…...

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Railcar Loading and Unloading operations (Canada)

Much of my work involves helping clients achieve more than “compliance” with minimum government standards.  I typically do this using RAGAGEPs; however, those may be too much to handle in some situations.  So, I will propose another government standard that applies to the process/hazard.  For example, unloading flammable liquid railcars.  Canada has some of the…...

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Old secondary containment design vs. New secondary containment design

In the old days, the secondary containment around flammable liquid storage tanks could be a single system in which all the storage tanks sat. Today, that is NOT the case. Both NPFA 30 and IFC Chapter 57 require secondary containment to be designed so that an LOPC from one tank cannot affect the other tanks…...

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Differences between a H-2 and H-3 occupancy

In terms of Fire and Building Codes, we have five (5) recognized areas associated with handling hazardous materials. We refer to these high-hazard areas/occupancies as “Group H”.  High-hazard Group H occupancy includes, among others, the use of a building or structure, or a portion thereof, that involves the manufacturing, processing, generation or storage of materials…...

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