Fire resistant material that allows air to pass through it? ~ fireproof airfilter

[RcRotaryMadness]

Been doing a bit of head scratching and wondering if anyone knows of a material that would act as a fireproof air filter?

It seems you can get them but only in the usa..

Its for a lipo storage box, it needs to let the air pressure out at a reasonable rate but ideally would hold flames back and filter out the black soot?

At the moment my only guess is the fibreglass cloth from a fire blanket is fire resistant and I think is breathable?

[pgkevet]

your problem there is that the material may be fireproof but you still need to allow the passage of very hot gasses... and they will still be hot the other side. that's why fire safes are rated for how long they can protect documents as opposed to a guarantee that they will.

[RcRotaryMadness]

Yeah thats a valid point.. will keep that in mind but i'm wondering if theres a way to hold back the black soot instead of having it cover the room.. can imagine that would be a real mess to sort out.

Sent from my Galaxy S2 using Tapatalk 4 Beta

[kroozing]

Activated carbon is permeable to gas but fire proof.
You can get carbon foam that will do just that, although get ready for the bank loan.

[RcRotaryMadness]

sounds interesting but needs to be low cost =)

I did think something like a wire wool would be good but obviously not wire wool since it catches fire so easily lol

[pgkevet]

The lipo fires I;ve seen have either just outgassed with copious white smoke that is corrosive or ocassionally actually flmed out when there's less smoke.
I suppose you could try to trap any particulate matter in a layer of rockwool but be aware that if the particulate matter itself is combustible then the rockwool could be a source of reignition

[RcRotaryMadness]

hmm yeah its a tricky one... I honestly thought some sort of filter would be readily available... but obviously not

[mpj88]

Why do you have an air tight box anyway? Surely metal fireproof boxs shouldnt be air tight to remove the risk of explosions?

[RcRotaryMadness]

Lol thats the problem i'm trying to overcome... its an air tight ammo box atm but clearly needs to allow pressure out else its a bomb should a lipo go up.

[mpj88]

Ha ok, maybe not the best enclosure then! is there a seal around the lid you could remove?

[RcRotaryMadness]

There is a rubber seal but didnt really want to remove it... also wonder how well the lid will stay shut once removed. Will have a think about it anyway mate :-)

Sent from my Galaxy S2 using Tapatalk 4 Beta

[pgkevet]

The purpose of an ammunition box is to keep the ammo in good dry condition and help it survive rough handling - not to contain a blast or prevent a fire. Assuming contents are ammo rather than grenades or HE blocks then a single fault/discharge isn't going to domino through the rest anyway. Stick the whole box in a bonfire and that's another matter....run...

Using them to contain a lipo fire is a matter of simplicity/convenience rather than commonsense..you'ld probably be better off putting the lipos in lipo bags in a cool box...?

[Qaz]

[url=http://www.wiremesh.co.uk/?id=35]Flame Proofing[/url]

[RcRotaryMadness]

The mesh looks good but can't see where i can order a small quantity of it.

Anyway since posting this thread i have come up with a way round it. Possibly better.. wait for the build thread :-)

Sent from my Galaxy S2 using Tapatalk 4 Beta

[ModelGuard.Com]

Ive had a lipo fire indoors whilst charging. I charge the lipos inside terracotta drainage pipes sealed at one end. With the open end pointed into the middle of the garage. This worked in containing the flames as I could make out scorch marks on the ceiling. I believe the lipo sent out a short burst of flame and then smouldered for some time. The worst part by far was the dense white smoke that completely filled the garage. I literally could not see further than my eyelashes. Once cleared this smoke left a layer of rust on everything ferrous in the garage. You can direct the flames but it's the smoke that's the problem. I wouldn't like that to happen inside the house I can tell you that much

Sent from my GT-I9505 using Tapatalk