Description of Incident: An operator was checking the level in a 500 gallon methanol storage tank: Tank was polyethylene plastic, double wall A worker climbed on top of the tank. Flammable vapour was ignited, when the worker touched the cap on the inner tank, resulting in an explosion and flash fire. The worker received first aid…...
Sizing emergency venting for atmospheric flammable liquid storage tanks is a safety-critical requirement, yet we often find it undersized. The core objective is to provide sufficient relief capacity so that, in the event of an external “exposure fire,” the tank does not rupture due to rapid internal pressure buildup from vaporizing liquid. Unlike normal venting…...
A little background on what this table is telling us: NFPA 77 classifies flammable liquids as Conductive, Semi-Conductive, and Non-Conductive: Conductive Liquids = >10,000 pS/m Semi-Conductive Liquids = >100<10,000 pS/m Non-Conductive Liquids = <100 pS/m In the tables below, 1 conductivity unit (C.U.) = 1 picosiemen per meter (pS/m)… Membership Required You must be a...
This video is a bit slanted for a lawsuit, but the video footage does demonstrate the significant impact a simple flame arrestor makes in flammable liquids safety! I need to state that a gas container in and of itself is NOT a hazard, but the fuel inside the gas container is a HAZARD. Although I…...
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Many of us got a “chuckle” from the 2013 Photo of the Week #42 (Smoking & Flammables) but here is proof it is NOT a laughing matter. We continue to see people who seem to forget that gasoline is a highly flammable liquid and that ignition sources like matches, lighters and lit smoking materials are a…...
A few months back I posted an article about flammable liquid storage cabinets and I used this image in the article. After more than 5,000 views I thought I would ask the question… What’s wrong with the picture? Only four people have sent me an e-mail or phone call about the photo. Now this photo…...
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Three workers are in critical condition with burns after the barge they were cleaning exploded. No one has said if the workers were inside the barge when it exploded; but from the visual damage I would say they were not inside it but most likely on top of it. The barge(s) last held a flammable liquid…...
A 46-year-old shipping and receiving clerk died from burns he received in an accident involving the ignition of diesel fuel. The victim’s duties included checking the level of fuel in the fuel tanks on refrigerated trailers that would be used the next day to transport processed product and refill the tanks if needed. On the…...
A 61-year-old powered-industrial truck operator died after his forklift ruptured a pipe containing a solvent mixture and the vapors ignited. The victim was operating his forklift in an area between a stacker and a printing press in order to pick up a waste pallet and transport it to the recycling area. Some part of the…...
In many instances, emergency venting is provided through pressure relieving devices such as weighted cover style emergency vents, loose manhole covers, rupture or burst disks, remote-actuated relief devices, or other pressure relieving equipment that may be used in place of pressure relieving tank designs. Although less recognized, in legacy installations the weak roof-to-shell seam construction…...
