Yes I have 2 of them.
FYI you should turn over each of your fire extinguishers at least once every 6 months to keep them working right. That means pick it up, rotate it upside-down, and let the stuff inside slide to the top, then turn it back over. I learned this from a fire inspector that I had to guide through a datacenter once.
It really depends on the kind of fire extinguisher as to whether that matters. That said, my understanding is that if it is a dry powder that has settled it would be visible on the pressure gauge.
Really, that is about actually checking the pressure gauge every six months. If you tell someone to look, they never will. If you tell someone they have to do something, they might. Its the same logic behind “testing” a smoke alarm. The electronics are simple enough that you would REALLY need to try to damage them (and they are set up to piss you off with incessant beeping when failing anyway). But by pushing the button every six months, you actually check if there is a battery in it and so forth. Rather than hearing it beep in the morning, telling yourself you’ll fix it when you get home, and never doing so.
How does powder settling affect a pressure gauge? There has been no change to the internal pressure of the vessel, the change loose vs compacted powered will not change the volume of materials inside the extinguisher. The only way the pressure should change is if there’s a leak.
It very much depends on the specific materials which is why it is a “let’s not get into this and just say ‘better safe than sorry’” situation but: Even if the powder is settled, it is going to almost immediately get kicked up and re-mixed once you start spraying. Probably don’t test this for yourself for obvious reasons, but that is why a “fresh” can of spray paint will basically always work. It might not be even for the first few sprays but it rapidly becomes even.
Over simplifying (because molecular dynamics and shit) but think of it like a really crowded room. You basically can’t sit down, let alone lie down, if it is crowded enough. And even if you try, someone will nudge you (or kick you) and you will get going.
As the pressure decreases, the settled powder is less likely to be disturbed and you are more likely to wake up from your nap wondering why nobody else is waiting for the new Star Wars with you. And that is why paint cans have the shaker and so forth.
So if your fire extinguisher has settled/compacted to the point that it is not viable? It is almost guaranteed to be because of a pressure leakage and that would be reflected on the gauge.
Now, there is probably some variant where this can happen regardless. But that would be a bad product anyway because these need to work even if nobody can ever be bothered to find the key to the glass box.
I have 3. 2 are still pressurized. One was used last night.
A note to everyone…do your welding before you paint and undercoat, or at least wait for it to dry fully first.
Everything is fine. I was welding in the outer rocker when it ignited. It was a brief flash and then it went out. I only used the fire extinguisher because I saw smoke coming from the seatbelt hole near the top of the door. I figured better safe than sorry. Of course now the inside of the rocker that I can’t get to anymore is covered in white powder, but at least it’s kinda fireproof now.
Maybe I am just projecting here, but I believe the average Lemmy user to be too much of a nerd to be welding in their free time. Is it possible to be both Bonehead?
You’re projecting. I weld because I’m a nerd. This job is just helping out a buddy, but before that I was welding a new mount for my trailer hitch snow plow that I built a few years ago. And this summer I want to build a remote control lawnmower which is going to involve a lot of welding, plus some code to reprogram the hoverboards that I bought for that project. The real challenge there will be adding basic intelligence with a Raspberry Pi so that it will mow the lawn itself. But that’s a few years away, since I still need to build it first. And that starts with welding the frame.
It’s not really possible to be both, since one is merely a tool that satisfies the needs of the other. Nerd always takes precedence…
Piggybacking on this PSA to remind everyone;
- Attack the base of the fire, where the fuel source is. You need to break the fire triangle to stop the reaction, and drowning out oxygen is the easiest way.
- Each rated pound of fire extinguisher yields approximately one second of use. They go quickly when you’re fighting any fire, and even small fires fight back. 5lb is the minimum imo, look at any commercial setting where OSHA applies and it’s big 10-20lb tanks generally.
- Trainers advise to blow the whole extinguisher even if flames aren’t visible to prevent auto-ignition.
- You really, really want a hose on any extinguisher. Invert the extinguisher to get under a car/cabinet/low obstacle and the extinguisher is useless as the pressurized gas escapes, leaving behind the powder/foam/water that actually stops fire.
As a gift to my friends who were going to be first time parents, I bought them a pack and play, a first aid kit, and a fire extinguisher. They laughed at my fire extinguisher gift and told their other friends who also laughed.
Laugh all they want burning alive is a shit way to go. And you might have saved them from that fate.
Awh, that’s kind of crappy. I’m hoping they just took it as a gag gift; be prepared for anything, a bit like Jack Jack in The Incredibles.
I hope theynever have to use it, but I hope they do learn how important it is.
Same for cleaning dryer lint; before I was born the entire family who lived across the road from my mum perished in a house fire from dryer lint catching.
Also add Carbon monoxide detectors to that list of devices you never want to need, but should never be without
I have four fire extinguishers:
- One in the kitchen
- One in the basement
- One in my office (where I do stuff like soldering and 3D-printing)
- One mounted to the roll bar of my Miata (I ought to get some for my other cars, but haven’t gotten around to making mounting brackets yet)
However, I never would’ve thought to check them (or turn them upside down to “fluff” them) without this post, so thanks!
