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[MW:2448] Re: requirement of purging in CS/SS pipes

By Materials & Welding
OK,why  SS is more suseptable than CS to get oxidised?

--- On Tue, 16/6/09, Antonio Ruscitto <ARUSCITT@metrogas.com.ar> wrote:

From: Antonio Ruscitto <ARUSCITT@metrogas.com.ar>
Subject: [MW:2447] requirement of purging in CS/SS pipes
To: materials-welding@googlegroups.com
Date: Tuesday, 16 June, 2009, 5:02 PM

Hi:
I think that is for the same reason. I´ve qualificated a Welding Procedure Specification with ASTM 106 G° B, with gas purging Ar inert gas. Because that reason
 
Regards
Antonio

>>> Sukamal Naskar <sukamalbecmet@gmail.com> 11/06/2009 08:36 pm >>>
For Stainless steel we do purging ( Inert gas like Argon ) to avoid the oxidation at the root. Stainless steel is more susseptable to oxidation than carbon steel.
for carbon steel root is not so much suseptable to oxidation , hence we don't use purging gas like Argon.
 
Regards,

 
On 6/11/09, prashant pansare <prashantpan_99@yahoo.co.in> wrote:
1) Why purging reqd.while welding with E316 / 316L for SS  pipes?
2) Why purging not reqd.while welding with ER 70-S for CS  pipes?
Pl. reply.

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