Re: [MW:5992] Problem wk\hile root run

Check your fillerwire grade if GTAW if ok then chek its chemistry.

I think this problem is with your filler wire.

 

 

 

 

PANKAJ

On Wed, Jul 14, 2010 at 6:27 PM, waman nilesh <wamannp@gmail.com> wrote:

I have problem while doing root run the weld get black from backside as we have maintain the backing 10 lpm & Shielding 12 lpm as per WPS. 

Can anybody tell me the reason & how to avid it.

Nilesh 

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