Re: [MW:11987] gas purging

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 -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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With regards,
Sudhakar.k

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