I’ve known a handful of people that I’ve pointed out major safety concerns to in their “labs”, usually the same people are the ones who say “Dont worry about it I’ve been doing it like this for years”.
Then one day the gamblers fallacy catches up with them and they get their shot at meeting Darwin.
Theres no substitute for proper safety. Most accidents I know of are caused by the misuse of compressed flammable gases…BUT I know two labs that were flashed out by ethanol, both were licensed and one was even run by a Ph. D.
Play stupid games people
Can you expound on the term “flashed out”
I wishi could find details, maybe he’s not discussing his failure, or his equipment’s,
I’ll post whati can find
Sure, heres the NFPA/wiki defintion
A flash fire is defined by NFPA 2112[1] as:
"A type of short-duration fire that spreads by means of a flame front rapidly through a diffuse fuel, such as dust, gas, or the vapors of an ignitable liquid, without the production of damaging pressure.
Flash fires may occur in environments where fuel, typically flammable gas or dust, is mixed with air in concentrations suitable for combustion.
In a flash fire, the flame spreads at subsonic velocity, so the overpressure damage is usually negligible and the bulk of the damage comes from the thermal radiation and secondary fires. When inhaled, the heated air resulting from a flash fire can cause serious damage to the tissue of the lungs, possibly leading to death by asphyxiation. Flash fires can lead to smoke burns.
Flash fire is a particular danger in enclosed spaces, as even a relatively small fire can consume enough oxygen and produce enough smoke to cause death of the persons present, whether by asphyxiation or by smoke inhalation.[2]"
In both of the ethanol cases I’m speaking of there was a buildup of ethanol vapor that was ignited by an electrical source, vs an open flame, and happened at night when said labs were closed.
Edit: I should also add that the human error of those fires was improper storage of bulk solvents . Major violations included storing ethanol in an open container, not storing ethanol in proper flammables cabinets that allowed for a falling light fixture to impact and break open a 50L HDPE carboy, and storing ethanol in close proximity to an electric heater.
Is the cord on that trs21 explosion proof? Is the cord long enough?
It’s not the plug that needs to be explosion proof it’s the outlet. The actual pump would need to be C1D1 rated. This being in a house I wouldn’t doubt a pair of basketball shorts was the cause.
As soon as I got to the third sentence, I realized it was going to be about improper ethanol storage.
NFPA and IFC have MAQs and safe handling guidelines for a reason!
Just a leak with no sensor, and static bearing clothing?
Yep that can get the job done
I have entered several spots of bho extractors that had the right amount of ventilation yet not positioned right
Bho is heavier than air and sinks to the floor in a straight line
So your ventilation must pass heavy on the floor area for that is where it accumulates
Its really that simple.
It’s crazy how many systems I’ve seen with no grounding.
Can you explain how to ground a cls in a shipping container. Sorry im pretty dumb about anything electrical related
Wire it to the container and wire the container to a metal pole 2’ in the ground
Use a thick massive copper wire for both
Take a copper rod 6’ long and drive it into the ground. Take a copper cable and attach it to the container. Now your entire container is grounded. Ground said CLS as usual.
Earth ground
Like your gas line incoming to the house/building.
This is a little fancier set up for a ground. Dig six holes and slide 4" pvc pipe. Put grounding powder and then Six 6’ copper rods. Then connect the rods in a sieries and then run a copper cable to your box or to what you are trying to ground. This is usually don in places with dirty power.
Would you consider a generator a source of dirty power? I’ve never heard that term
It could be depending on the generator. So your electrical feed should be 60 Hertz with a +/- 5-10htz in the wave pattern. You start running into problems with digital appliances/machines when that pattern jumps to say 80-90 or drops to 30-40. The drop isn’t as bad as the spike is what can fly circuits. This is a good article about this.