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  #11  
Old 25th November 2011, 07:40 PM
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rapidtornado rapidtornado is offline
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Thanks for the info and link, much appreciated!
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  #12  
Old 25th November 2011, 08:43 PM
PorkChop PorkChop is offline
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Quote:
Originally Posted by Talonmotorsport View Post
Pub type C02 bottle regulator has a plain nut that screws ON TO the threadhttp://www.ebay.co.uk/itm/Co2-Gas-Re...em256923 191f

Industrial big bottle type regulator has a CONE SHAPED fitting the screws IN TO the bottlehttp://www.ebay.co.uk/itm/Oxygen-Gas...em5d304c b0fd

You can also get a brass adaptor to make the industrial regulator fit the pub bottle if you can find them.... It's also worth using some ptfe tape on the adaptor thread to make it gas tight instead of trying to over tighten the thread.
I'd just like to point out that tape should only be used on tapered threads. If you need to put tape on a straight thread, then the fitting isn't seated correctly. Straight fittings don't seal on the threads. A tapered thread without tape is more likely to leak.
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  #13  
Old 25th November 2011, 11:25 PM
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CO2 is added to pure argon to increase penetration, CO2 on its own will burn into the parent material, but will produce a brittle weld.
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  #14  
Old 26th November 2011, 03:48 PM
flyerncle flyerncle is offline
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Some top end regulators as the Siegen one I have will fit both types of bottle.
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  #15  
Old 26th November 2011, 07:15 PM
robo robo is offline
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Cant see why anyone would want to use anything other than the correct gas. I once used the argon bottle off the tig on the mig when the mig bottle ran out and the weld looked crap.My mate insists on using pub gas on his mig to save money and those welds always look like they have been frazzed.

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  #16  
Old 27th November 2011, 11:48 AM
baz-r baz-r is offline
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Quote:
Originally Posted by Wynand View Post
Quite correct mate.
In fact, all fittings and nuts on acetylene equipment is left hand thread and furthermore marked with a groove cut on nut/fitting for identification to prevent accidental connection to the oxygen side...
all fuels are l/h (have a notch at corner of nuts) oxy and innerts are r/h threads
regulators should always be marked for type of gas and never mixed as its very dangerous (like acetlyene over pressurised out of its acetone will explode its a very unstable gas and can burn on its own with no oxygen!)
saying that co2 and argon can be swaped but purge out co2 for when using pure argon
pub bottles have a diffrent fitting to industrial cyl


also oxy equipment should be kept totaly oil and ptfe free as can burn internaly thats verry unsafe!
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  #17  
Old 27th November 2011, 12:47 PM
robo robo is offline
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Quote:
Originally Posted by flyerncle View Post
Some top end regulators as the Siegen one I have will fit both types of bottle.
We have used the oxy gauge on the mig bottle before now with no problems.

bob
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