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Re: [MW:11987] gas purging

By Materials & Welding
Gas Purging is done to avoid oxidation during welding. Gas purging is Mandatory to all material which responds to oxidation during welding  irrespective of process.. generally  when the Cr content exceeds more that 2.5 % in overall composition of a particular material inert gas purging should be done before welding.... I don't think by using  MIG process   we can avoid puring!!!

Mr Prasad can I know for what material your talking about???  

regards
sudhakar.k

 n Fri, Jul 29, 2011 at 8:41 PM, abdul khan <abdul_khan2010@yahoo.co.in> wrote:
Dear Prasad
Gas purging is done only on P number 5 and above base metal , purging is not based on welding process or type.
 
I hope the answer to your  question.
 
Regards
ABDUL JABBAR KHAN

--- On Fri, 29/7/11, Prasu Cutie <pracuty@gmail.com> wrote:

From: Prasu Cutie <pracuty@gmail.com>
Subject: [MW:11977] gas purging
To: materials-welding@googlegroups.com
Date: Friday, 29 July, 2011, 5:01 PM


Why gas purging is not mandatory for MIG welding as it is mostly used for TIG welding?

In MIG welding i found contamination is very lass as compared to TIG welding without purging.

Can any one clarify me??????


Regards
Prasad


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With regards,
Sudhakar.k

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