Stainless back purge

[J_K]

Quick question.
Can I back purge with normal mig gas?
I don't have a splitter and spare flow meter to set up a back purge of Argon.

 

[backpurge]

No, you need to use argon, nitrogen, or for best results a nitrogen/hydrogen mixture

 

[J_K]

******.
Thanks.

 

[Moose-LT]

What equipment is needed to backpurge, and where can it be purchased? I've been asked to repair a crack in a stainless exhaust system and need to find the back purging equipment neccessary.

Thank you.

 

[hotrodder]

If you search the TIG forum for 'purge' you'll find loads of threads on the subject, here's one... http://www.mig-welding.co.uk/forum/showthread.php?t=12621&highlight=purge
This is what the often mentioned 'Y-splitter' looks like... http://www.weldequip.com/twin-outlet-valve.htm. They're available from pretty much any welding store, you fit one to the regulator output and then fit flowmeters to it.