Hey seabreeze brains trust - somebody must know :)
Chasing disposable cylinders for MIG welder. The green ones that are 2.2L (220L gas) .... not the poxy ones that hold enough for like 20mins welding if u r lucky.
Googling shows me nil, only an ebay seller and I bet post is crazy high as it is D.G
As usualllll Bunnings employees look like stunned mullets at the terms
MIG
Argon
etc.....
if you get desperate, try the pub! [somehow I think you should know your way there]
mates of mine have used beer gas as an emergency backup plan.
stephen
yep, you can use carbon dioxide for mig as long as you don't need to use a spray transfer arc. ie you can weld half inch plate no problems, even 16mm if it's not high stress/pressure.
you might need to buy an electric pre heater so the line doesn't ice up on winter mornings, but that costs bugger all
Just to clarify I don't want a full size cylinder so that rules out CO2.
(Even the smallest - G size??- has rental that is excessive for how much I will use it)
I want to do mild steel and stainless and aluminium so means 3 different gas compositions. For most general mild steel welding I am having success with gasless so the cylinders will only be used for 10mins welding a few times a year. Easier to buy disposables.
I had some idea but at this moment I don't have enough space in my garage to implement.
I could hire for an hour the standard bottle from BOC - which is much cheaper that disposable and then release whole content to big plastic bladder.
Bladder is light could be hang at ceiling to save space then using small compressor drain Argon from bladder and supply to my MIG welder trough regulator. I tested alread aquarium air pomps and car 12V compressors but they do not have required output at least 5-10 litre/ per minute
Making bladder shouldn't cost more then twenty dollars to 5,000L , alternatively air matte race could be used but they allow max 1,000 -2000 litre.
Air matterace have at least good connectors already done.
I know some people do transfer also the lot to Aqua Lung, diving bottles...
since I don't need a lot hire bottle from BOC is not good option for me. Beside I probably need two : one for mild steel and one for aluminium.
for christ's sake, just pay the 40 cents a day bottle hire...
and btw mark- g size is the big bottles, but the hire fee is usually the same no matter the size
Select to expand quoteMark _australia said..
Just to clarify I don't want a full size cylinder so that rules out CO2.
(Even the smallest - G size??- has rental that is excessive for how much I will use it)
I want to do mild steel and stainless and aluminium so means 3 different gas compositions. For most general mild steel welding I am having success with gasless so the cylinders will only be used for 10mins welding a few times a year. Easier to buy disposables.
well you need your own bottle and a fill line. Then you rent one next big job you have, decant into your bottle (will only ever decant half as pressure equiises) use some more of theirs for your big job and then take it back after 2 or 3 days and stop paying rent. trouble is getting your own bottles but I guess if you can't procure, some other bottle might do if you empty out
so $300 a year for rental on 2 cylinders - an AR/O2 and a AR/CO2... to do a few small jobs
That's nuts.
myusernam, yes when I score a bottle for free (thanks sn 
) and have used that I can fill it. But not with a couple of different gases at the same time.
I do mostly mild steel, but maybe every few months I will do 10mins welding on stainless or ally. I may not use it for a year. I may do 3 little jobs in a week. That does not warrant holding 3 x cylinders.
I can get a good economical result out of $70 disposables (40-55min welding time). But that includes freight from over east and as it is dangerous goods I am sure I can get them for about $40 or $50 here.
Thus, looking for a Perth stockist of disposables.
