[MW:30516] Re: Oxygen level in purging gas during welding of duplex stainless steel

dear Frend,

I would like to know why welding duplex required two purging one is from mix gas and the another one is analyzer oxygen.

thanks. 

Dino 

On Wednesday, 28 December 2011 15:56:29 UTC+8, Martin Prad wrote:

Hi friends,
 
I have 2 different specification which the requirements are different for the oxygen level in purging gas during the welding of super duplex pipe.
 
One of them calls for 25 ppm (0.0025%) another one calls for 5000 ppm (0.5%). Could you please shed some light on this as which one is up to the standard with references?
 
Thanks,
Martin.

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