brightspark
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dunno how true but someone said it gave off fosgene gas when burnt
- Thread starter Tangledfeet
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The_Yellow_Ardvark
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The MOD stopped using it in 2008. So by 2013 they should all be replaced.
The Aero industries still use it as engine drench systems.
But it to is being phased out.
brightspark
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I thought so. I nearly snuffed it spraying a motorbike frame over an open gas ring in the garage with hammerite using it as the thinners. was overcome with the fumes and crawled out of garage 
was pretty lucky to get out thinking about it now 
https://www.google.co.uk/search?sou...waDrAhUShRoKHcv0CGMQ4dUDCAw#spf=1597608064841
was pretty lucky to get out thinking about it now https://www.google.co.uk/search?sou...waDrAhUShRoKHcv0CGMQ4dUDCAw#spf=1597608064841
WorkshopChris
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You need to be very carefull with co2 if wood dust is around, what may be a small burning/smouldering fire may posibbly turn into a fire ball as the co2 blows the dust everywhere and it ignites.
brightspark
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so does a water one I put some on a big 3 foot wide beltsander at a factory that was on fire . I opened the side door on it and squirted it in all the sawdust blew out and flared up
shut the door and fire brigade came and put it out
MetalMonkey
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The problem with powder is not only the initial mess that they create, but also the long lasting corrosion and destruction which continues to happen on anything they get into, I've always been wary of the damage they could do to machinery and electronics.
I've heard good things about these water mist extinguishers which are supposed to be safe and effective on all types of fires, and much less damaging. However, I've not had any experience of using one so I have no idea if they are snake oil or not - but might be worth checking out.
I've heard good things about these water mist extinguishers which are supposed to be safe and effective on all types of fires, and much less damaging. However, I've not had any experience of using one so I have no idea if they are snake oil or not - but might be worth checking out.
The_Yellow_Ardvark
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You can use a "Water Mist" on electrical fires.
Only as a last resort.
But in short controlled blast.
How ever we always teach.
If in doubt.
Get out.
WorkshopChris
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I have been waiting to find one to have a play, seen lots of promotional videos, but would like to try one in the real world, was wondering how they get on with powders like fine wood dust. At the moment a hoselock multi head hose pipe end on mist setting is the safeest methode i have come across so far.
I took a course at the dnd damage control they had a large tank of oil with a large cylinder to represent a downed helicopter when the fuel was lit you’d have to put it out with a wand basically a shower head emitting a fine mist the resulting steam smothers the fire but you did have to watch out for backflash. They also had a steel building with grates on the floor called the torch but they didn’t put us through it!
doubleboost
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I have a couple of Co2 a big foam .
2 BCF 2 kilo jobbies that really work
I believe BCF is now banned but the Navy and RAF still use them
A sand bucket can be really effective
For a real goer you need vast amounts of water
2 BCF 2 kilo jobbies that really work
I believe BCF is now banned but the Navy and RAF still use them
A sand bucket can be really effective
For a real goer you need vast amounts of water
Screwdriver
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I bought a steel cabinet with the express purpose of having all the flammable liquid kept safe and on wheels next to a door rather than scattered around the welding bench...
Sadly MyHermes managed to literally destroy a solid steel cabinet before it even got here I think they dropped it off the back of the lorry by trying to lift it by the handle, ripped to top off, smashed the base. They dumped it at my front door and legged it.
Sadly MyHermes managed to literally destroy a solid steel cabinet before it even got here
I think they dropped it off the back of the lorry by trying to lift it by the handle, ripped to top off, smashed the base. They dumped it at my front door and legged it.dunno how true but someone said it gave off fosgene gas when burnt
It is a myth. The only reason the stuff was banned was because of the ozone layer. Personally I think the fire will cause far more pollution.
Still used on aircraft as they are the best type to have. A 1kg BCF is equivalent to 10kg CO2.
Halons are low-toxicity, chemically stable compounds that have been used for fire and explosion protection from early in the last century. Halon has proven to be an extremely effective fire suppressant. Halon is clean (i.e., leaves no residue) and is remarkably safe for human exposure. Halon is a highly effective agent for firefighting in closed passenger carrying areas. Due to its effectiveness and relatively low toxicity, the FAA continues to recommend or require Halon extinguishers for use on commercial aircraft.
Tangledfeet
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Well... let's hope I'm not on an aircraft when it gets released.
Halon can cause heart sensitivity (racing heart, palpitations, etc.) in a small number of people - myself included. Discovered this doing a Merchant Navy fire-fighting course in the early-90's when it was more commonly used. I keeled over when a small amount was released in a demonstration; none of the staff there had come across it happening before.
The_Yellow_Ardvark
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Halon is being phased out of the aircraft industries.
No new units being made, so stocks are being used up.
But there is a lot of stock. A 747 may have to have at least one unit change after a transatlantic flight. But as the suppression system has to be the same, they will fit another Halon unit. But new planes have different systems.
BAE are leading the development of thinner wall CO2 cylinders.
One idea they have looked at is Alloy Honeycomb cylinders. If that is a success then we could hope to see the same amount of CO2 as a 5Kg CO2 extinguishers is a unit not muck bigger that a traditional 2kg CO2.
A 2kg Co2 unit has 2kg of liquid CO2 stored in it, the rest of the weight, approx. 2kg is the weight of the cylinder and head. One reason steel bodies were phased out, the weight.
Weight is the main reason you see a lot of 6lt foams and 6kg Dry powder units, as they weigh in at approx. 9kg. This was chosen as it was deemed the "average" person can lift, carry and use a unit of that size.
There is a lot to be considered when installing a extinguisher.
No new units being made, so stocks are being used up.
But there is a lot of stock. A 747 may have to have at least one unit change after a transatlantic flight. But as the suppression system has to be the same, they will fit another Halon unit. But new planes have different systems.
BAE are leading the development of thinner wall CO2 cylinders.
One idea they have looked at is Alloy Honeycomb cylinders. If that is a success then we could hope to see the same amount of CO2 as a 5Kg CO2 extinguishers is a unit not muck bigger that a traditional 2kg CO2.
A 2kg Co2 unit has 2kg of liquid CO2 stored in it, the rest of the weight, approx. 2kg is the weight of the cylinder and head. One reason steel bodies were phased out, the weight.
Weight is the main reason you see a lot of 6lt foams and 6kg Dry powder units, as they weigh in at approx. 9kg. This was chosen as it was deemed the "average" person can lift, carry and use a unit of that size.
There is a lot to be considered when installing a extinguisher.
What amused me with my second hand CO2 cylinders was the weights marked on the regular inspection labels, they were virtually ALL hand written as 5.0 kG but actually every one was somewhat more than that (no not the horn issue) so some lazy bod in the past hadn't properly measured them.
The_Yellow_Ardvark
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That is one of the tings that annoy me when doing a CO2 service, No one weighs them.
I had a steel body CO2 for 8 years it was marked at 4.9kg. In the real world it was 6.9kg.
When you buy a calor gas cylinder the actual fill weight is marked. It's amazing how much it varies. Supposed to be 15kg but I have seen 17.8kg. I always go for the fullest one
