....It works differently... ! You don't live in California, by any chance, do you, Bob? "8) On 11/3/17, Bob Blick wrote: > It works differently depending on which mob is running the gases mafia in > your area. Where I live, only one size is "customer owned", all others ar= e > rentals and have collars with a name on it. There is no refilling. You sw= ap > tanks at the gas supply house. If your tank has expired, swap it at the s= ame > place you got it, no extra charge for recertification. Rental tanks must > always be swapped at the named supplier, of course. > > My "customer owned" argon tank costs under $70 to swap ($45 + taxes and > fees). I forget the size, probably 120 to 160 ft^3, it's about 5 ft tall > with its cap on and 9 inches diameter. I could probably shop around and g= et > a better price but I'm not a big customer so I go to the place that is > nicest to me. > > CO2 is another story, it's cheap and easy to swap since both the beverage > and marijuana supply places service CO2 as well as the welding supply. > > Friendly regards, > > Bob > > ________________________________________ > From: piclist-bounces@mit.edu on behalf of John > Gardner > Sent: Friday, November 3, 2017 1:37 PM > To: Microcontroller discussion list - Public. > Subject: Re: [EE] Vacuum plumbing > > If you buy a tank you need to be aware of the manufacturing date. > > Theoretically you can get them re-certified, for about 3X the cost > > of replacing the cylinder... > > Last time I looked, anyway - It's been awhile. > > On 11/3/17, Denny Esterline wrote: >> As luck would have it, I just bought a welder for my shop and I still >> have >> the receiving paperwork on my desk.... >> In Tucson AZ, USA. I bought two 125 cubic foot rated steel tanks for >> $196.10 US each. >> One filled with 75% Argon, 25% CO2 - the gas cost an additional $19.23 >> and >> the other filled with "pure" argon which cost an additional $17.89 >> As this is sold as welding shield gas, I'm going to assume "pure" is >> about >> 99.999%. >> >> >> Man, I really need to clean off my desk. >> >> -Denny > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .