Wednesday, May 25, 2011

[MW:11145] purging/backing gas...............

Hi mustaffi,
 
It is better to use 99.998% purity of ultra pure argon as a purging & shielding gas.It gives sound quality of welding and better results.
In this other components are
                                         oxygen   -- < 4.00PPM
                                         Moisture -- < 4.00PPM
                                         THC       --  < 0.5PPM
Oxygen & moisture percentage is more than 0.4PPM it may leads to corrosion ,contamination &  porosity.
Maintain gas flow rate between 25 to 40PPM.
 
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THANKS & REGARDS
 
KALYAN VVV
WELDING ENGINEER
THYSSEN KRUPP INDUSTRIES (INDIA) LTD
HYDERABAD
Mob.NO- 09885273257

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