• Aurenkin@sh.itjust.works
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    2 days ago

    I’m probably just being dense but what’s the difference between being flammable and being susceptible to combustion?

    • Skua@kbin.earth
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      2 days ago

      In technical safety terms, combustibles are harder to ignite than flammables. So diesel and olive oil are combustibles, for example, because neither of them give off enough ignitable vapour at room temperature. Ethanol does, so it gets classified as flammable, and you need to store and handle it more carefully than diesel. Then there’s really horrible stuff like triethylborane which will catch fire upon meeting oxygen even at temperatures well below the freezing point of water

      Of course in casual usage they mean the same thing

    • disguy_ovahea@lemmy.world
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      2 days ago

      They’re referring to the relationship between surface area and combustion. Talc, for example, melts but does not burn. Talc powder can ignite if blown over an open flame.

      • PhobosAnomaly@feddit.uk
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        2 days ago

        My first thought was: “I must try this”. I need to read my house insurance policy first.

        Curiosity got the better of me when I waved an alcohol wipe over an open flame. There’s still a dark mark on the office carpet tile from where I had to stamp it out.

        • spooky2092@lemmy.blahaj.zone
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          2 days ago

          Please invest in a fire blanket and keep it near by when you do stupid things with fire.

          Signed, a fellow fire bug

          Mine paid for itself the first time a flame got out of control while I was having some fun. No lasting burns to human or objects in my office lol.

        • Karyoplasma@discuss.tchncs.de
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          2 days ago

          Keep away from dust explosions, they are very uncontrollable because they ignite very fast and produce a lot of heat. It’s technically not an explosion, but it definitely is an easy way to burn your house down.

          • Grimpen@lemmy.ca
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            2 days ago

            Mythbusters did this with coffee whitener as I recall. Impressive.

            This has also happened to sawmills and flour mills, under less controlled circumstances.

    • Karyoplasma@discuss.tchncs.de
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      2 days ago

      You’re not dense for asking a question. Without asking questions, it’s Impossible to learn.

      The flash point is different. The flash point is the temperature that is necessary to create enough vapor for the substance to ignite.

      Flammable material has a low flash point, which means it catches on fire easily. Think gasoline. Combustibles need a higher initial temperature, but eventually they will burn and sustain the burning until running out. Think wood.