They come in different sizes. I think mine is an 125 or 150cf tank. For an occasional welder/hobbyist, it lasts me a long time and fits in my welding cart.
Here's a helpful chart I found online.
weekend welder here, using an 80, lasts me nearly 6 mos. You don't state your intentions, weekend work or shop work?
With my first tank full, I did a little big of welding on a 52 Dodge Truck project and most of the welding on my mustang so far (maybe 200-300 plug welds and welding up the shock towers and frame rails). I also did a ton of practice welding.
I'll get you a picture of my welder cart later today and will post it up. My cart came from Northern Tool.
Capacity is only rated at 100 lbs.I have the 150cf tank of 75% Argon / 25% Co2, a Harbor Freight Mig Cart, and a Harbor Freight Chicago 220v 35-110Amp Mig solid/flux welder (no longer sold). I learned with this setup and though I did not use it to put all the sheetmetal on my car, I have been doing a lot of fixing what he messed up stuff with it for the past year and doubt I have used even 1/2 of the tank. I think I'm on my 3rd roll of 2lb welding wire.
My Mig is set up for 100% CO2, and I took my tank to the local Red Ball store and ended up with a CO2 tank that is supposed to go in a Coke vending machine. When I asked about it, he said it wasn't a problem, just when I needed it refilled, to be sure I brought it back to him. That's not a problem because he is the only supplier in about 75 miles.
Make sure your local guy will fill or exchange your bottle. Try to find a Airgas or a Redball dealer for your refills.
Gas Bottle - Refurbished, Metal Working, Welder Supplies, Welding Accessories | USAWeld.com
My first 47" bottle was just south of $200 from airgas, the fill was around $72. Since then I found another local (Miami) small welding supply store that will swap the bottles for $27.
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Looks like testing gets them certified for 10 years. Got my welder in Saturday. I think my tank got here today, will find out shortly
What welder did you get and what do you mean the tanks not as advertised?Got my tank, not exactly as advertised, is around 26" to top of valve and 7" in diameter but still appears to be around a 55 cf tank