Pressure tank

I need a pressure tank for pneumatic tools and shit. Is there anything speaking against getting an used 20-50 litre 200 bar welding gas/oxygen gas tank and use it for my pressure gas? My shitty compressor only makes 8 bars anyways.
How do I deal with inside rust and condensed water inside?

  1. 2 months ago

    Why would you do that when you can get an actual compressed air tank for way cheaper? You don't need 2000psi so why pay $500 for a 2000psi cylinder when you could buy a brand new 60 gallon compressor for that?

    • 2 months ago

      You're assuming things. I can get used tanks for 20 bucks. A decent aluminium or stainless tank with half the capacity costs 20 times the money.

    • 2 months ago

      Nail gun go *boom*

  2. 2 months ago

    what about an in line filter?
    >if you have these with no other use for them
    >or get them free or close to free
    >just put heavy oil in it and roll it around to coat
    >you can try putting a drain in it and draining the water and occasionally getting a few drops of oil in when its empty
    the bottom always rusts the fastest so draining it and putting in a little oil will make it last a lot longer
    I think any type of coating has chance of imperfections letting water get behind it
    >depending on how heavy it is and what you do with it you could turn it upside down to drain

  3. 2 months ago

    The glaring issue is that they hardly hold anything for their size and weight. If you don't need to move them, that's not such a big deal. You're going to have a stupid heavy compressor to move around, if you're trying to make this thing portable.

    Other than that, nothing, really. Assuming you're using an oiled compressor, rust is a non-issue. At least, not any more than with a regular tank. Drain it regularly and it'll be fine.

    >A decent aluminium or stainless tank

    Why are you even looking at those if cost is your main concern? Aluminum portable air tanks are a luxury, the normal ones are just mild steel. I'm sure they exist, but I've never even seen a stainless air tank that wasn't for some specialty purpose.

  4. 2 months ago

    It's been done.

    You really need to know fittings and such. But it's been done.

  5. 2 months ago

    what do you need to power?

    a tank of compressed air thats like 100cu will weigh 60-70 pounds and work powering something like a impact gun for like 4 minutes then you'll have to get the tank refilled

    small super quiet dual piston air compressors are like 300 bucks these days

  6. 2 months ago

    Nothing really if you can get one for cheap. Well apart from they weigh a fuckton more than a bog standard air tank.

  7. 2 months ago

    High pressure gas cylinders are fine for low pressure air. You're not coming close to straining them with a home compressor. However the smart way to go portable is not a heavy high pressure gas cylinder but a CO2 cylinder which holds far more volume because CO2 stores as liquid under pressure.

    I collect CO2 cylinders for inflating tires in the field, seating tire beats, and running some pneumatics for a short time. I use a long hose and wear gloves because expanding CO2 cools rapidly.

    Read but do not buy:

    Instead buy a fixed pressure gaugeless (to avoid breakage) regulator and install a brass Milton high flow chuck. I also use old balloon inflators but their max psi is lower than the 150-200 I prefer.

    CO2 gets you mobility. The only way I'd reuse cylinders is if they're condemned (the local welding supply won't exchange them because of corrosion or arc marks). Your home compressor would itself break before ever threatening a high pressure cylinder. DO NOT EVEN THINK OF USING ANYTHING BUT AN INERT GAS CYLINDER. If you pump air into an acetylene cylinder have a bro stream the explosion.

    If you can get used GOOD cylinders for 20 bucks I'd gobble those fuckers up to fill with their original contents. I have acetylene, oxygen, nitrogen, MIG mix and CO2 in various sizes and it's insanely handy. Cylinders don't depreciate and I never run out on weekends.

    If you want air get a compressor.

  8. 2 months ago

    Is that cylinder OPs? Linde is a hyooge company that bought many others so those should be easy to exchange.

  9. 2 months ago

    If you mount the cylinders inverted you can drain from a fitting on the bottom. You'll require the correct nipples and nuts to fit your cylinder valves since they're specialty parts.

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