#1 Cat 3512 sucked a valve punched hole in piston engine running on lube oil being being pushed up into manifold. CO2 shot into air intake shut down the engine.[/quote]
Would a spark change that scenario? If the atmosphere contained gases at or above LEL/LFL (the explosive or flammable limit), running on lube oil is probably going to be the least of that engine’s (and your) problems for the next few seconds.
#2 short in 24 volt electrical system caused insulation on wire to ignite. A quick blast of CO2 after de energizing extinguished the small fire.
Would a spark have changed that scenario? If the atmosphere contained flammable or explosive gases at or above LEL/LFL that quick blast would not have come from your extinguisher.
#3 Alternator caught on fire. De energize system and a quick shot of CO2 to put out the flames.
Would a spark have changed that scenario? Again, if the alternator caught fire in an atmosphere containing flammable or explosive gases at or above LEL/LFL you probably wouldn’t be using a portable CO2 extinguisher anyway.
My concern with the portable CO2 on the barge would be a static discharge on deck where there may be explosive vapors. I do realize the risk of CO2 in a small area too.
See the above …
If explosive vapors exist on deck and a fire has been burning long enough for you to pick up and use a CO2 extinguisher, do you think a spark from the nozzle to the flames is going to change the outcome?