For SS purge / back gas is always requried.
Followed gas can be used as root shield, Ar, N2+H2(5-20%) mixture
(FORMIER) or pure nitrogen
http://www.aga.com/international/web/lg/aga/like35agacom.nsf/docbyalias/shielding_gases
Regards, jimmy
On 12 June 2010 10:58, Raghuram Bathula <raghurambathula@gmail.com> wrote:
> Dear Mr Prasad
> I have no practical experience on this process, however as far as i know,
> backing gas is any way required in this process too, active flux acts as
> penetrating agent only for deep penetration.
>
> On Sat, Jun 12, 2010 at 8:00 AM, N VENKATESWARA PRASAD
> <weldengr.velosi@gmail.com> wrote:
>>
>> Dear Mr. Raghuram,
>>
>> I have gone through the A-TIG process use on SS pipes. Will this flux
>> aovid the root oxidation. In piping we use Argon gas back shielding to
>> avoid root oxidation. This paper does not talk about oxidation.
>>
>> Regards
>>
>> N.V. PRASAD
>> WELDING ENGINEER
>> VELOSI CERTIFICATION
>>
>> On Wed, Jun 9, 2010 at 1:40 PM, Bathula Raghuram (Mumbai - PIPING)
>> <R.Bathula@ticb.com> wrote:
>>>
>>> Further to below pl. refer attachment
>>> ________________________________
>>> From: materials-welding@googlegroups.com
>>> [mailto:materials-welding@googlegroups.com] On Behalf Of pankaj abhang
>>> Sent: Wednesday, June 09, 2010 3:40 PM
>>> To: materials-welding@googlegroups.com
>>> Subject: Re: [MW:5486] Active TIG?
>>>
>>>
>>> Dear kesavalunanda,
>>>
>>> Active-TIG welding ( hereinafter called as A-TIG welding ) is a welding
>>> method capable of drastically increasing further its penetration depth than
>>> in the conventional TIG welding by applying an active flux on the surface of
>>> steel product placed on the welding line. This welding method was proposed
>>> in 1960's, and is practically applied so that it can be easily used by the
>>> progress of recent research and development. By this, a drastic efficiency
>>> improvement can be materialized in TlG welding, drawing remarkable attention
>>> to it. which is such a new welding method.welding.
>>>
>>>
>>>
>>> Regards,
>>>
>>> Pankaj
>>> On Mon, Jun 7, 2010 at 8:42 PM, kesavalunanda <kesavalunanda@yahoo.co.in>
>>> wrote:
>>>>
>>>> Dear Friends,
>>>>
>>>> Can anybody clarify my doubt….please,
>>>>
>>>> the question is" what is A –TIG (Active-TIG) ?"
>>>>
>>>> This question is asked in AMIIW(Associate membership in Indian
>>>> Institute of Welding-kolkata-www.iiwindia.com) Exam-Summer-2009(AME-15)
>>>>
>>>> Thanks,
>>>>
>>>> Regards,
>>>>
>>>> K.NANDAGOPAL ;
>>>>
>>>> +91 9698997022
>>>>
>>>> +91 9360049258-
>>>>
>>>> Tamilnadu,
>>>>
>>>> INDIA
>>>>
>>>>
>
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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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