Skip to main content

Re: [MW:18252] I need a clarification, is FCAW process comes under gas metal arc welding process?

By Materials & Welding
Sec. IX (2010) have only "listed" the essential variables of GMAW and
FCAW together.
Essential variables for Procedure Qualifications (both FCAW and GMAW)
are listed together under QW-255, while those for performance
qualifications are listed under QW-355.

But the point is even according to new ASME, If you change the process
from GMAW to FCAW, it means that you have changed the filer metal
product form (QW-404.23) and changed the shielding (QW-408.2) and
sometimes transfer mode changes (QW-409.2) to globular that all of
them are essential variables and need a new PQR.

This categorization will not do any good for anyone, neither for the
engineer nor the inspector (except for the publisher who will have
less pages to print). So Why bother...?
It doesn't change anything in the real world. If you go for FCAW then
you have to go through the qualification process all over again.

Unless one wants to win the "I know SAME Sec. IX word by word" contest
that is certainly not our case...!!!

For the sake of listing the welding variables, you can accept this
reasoning to categorize FCAW as a gas metal arc welding but it doesn't
mean that those are same process.

These are two different processes with different settings and
features. Their applications are quite different in many cases. Not
only Flux does provide shielding but it also refines the molten metal
and in some cases has an alloying function. The slag gives FCAW many
features and the list goes on...


Personally, with all respect that I have for ASME, I think it is
making confusion between users. Many people argue about this issue I
believe ASME should get back to the old system.

Regards
Ramin Kondori
IWE AT0070

------------------------------------------------------------------------------------------------
On 7/22/13, prem nautiyal <prem_nautiyal26@yahoo.com> wrote:
> YES.
>
> QW-492 gives the definition:
>
> welding, flux-cored arc (FCAW): agas metal-arc welding
> process that uses an arc between a continuous filler metal
> electrode and the weld pool. The process is used with
> shielding gas from a flux contained within the tubular
> electrode, with or without additional shielding from an
> externally supplied gas, and without the application of pressure.
>
> Regards
>
> Prem Nautiyal
> 9769316004
>
>
>
> ________________________________
> From: Tarek Yehia <t.yehia2009@gmail.com>
> To: materials-welding@googlegroups.com
> Sent: Monday, July 22, 2013 10:09 AM
> Subject: Re: [MW:18236] I need a clarification, is FCAW process comes under
> gas metal arc welding process?
>
>
>
> Dear Raghuram Bathula,
>
> what is in QW-492?!!
>
>
>
> On Mon, Jul 22, 2013 at 7:23 AM, Ravikumar, Thattekere Siddappa
> <travikumar@flowserve.com> wrote:
>
> Yes it is under gas metal arc welding , which will with flux wel be coated
> for continuous shielding , weld parameters are slightly variable to GMAW
> and the gas consumption will be less compared to GMAW
>>Regards
>>TSRK
>>
>>From:materials-welding@googlegroups.com
>> [mailto:materials-welding@googlegroups.com] On Behalf Of Raghuram Bathula
>>Sent: 22 July 2013 09:49
>>To: materials-welding@googlegroups.com
>>Subject: Re: [MW:18232] I need a clarification, is FCAW process comes under
>> gas metal arc welding process?
>>
>>Yes, refer QW 492
>>On 21 July 2013 21:12, PK M <pkmqaqc@gmail.com> wrote:
>>Dear Experts,
>>I need a clarification, is FCAW process comes under gas metal arc welding
>> process?
>>
>>Thank you.
>>
>>Pkm..
>>
>>--
>>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/
>>http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>>
>>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.
>>---
>>You received this message because you are subscribed to the Google Groups
>> "Materials & Welding" group.
>>To unsubscribe from this group and stop receiving emails from it, send an
>> email to materials-welding+unsubscribe@googlegroups.com.
>>For more options, visit https://groups.google.com/groups/opt_out.
>>
>>
>> --
>>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/
>>http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>>
>>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.
>>---
>>You received this message because you are subscribed to the Google Groups
>> "Materials & Welding" group.
>>To unsubscribe from this group and stop receiving emails from it, send an
>> email to materials-welding+unsubscribe@googlegroups.com.
>>For more options, visit https://groups.google.com/groups/opt_out.
>>
>>
>>
>
>
> --
>
> Best regards,
>
> Tarek Yehia
>
>
> --
> 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/
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
> 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.
> ---
> You received this message because you are subscribed to the Google Groups
> "Materials & Welding" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to materials-welding+unsubscribe@googlegroups.com.
> For more options, visit https://groups.google.com/groups/opt_out.
>
> --
> 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/
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
> 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.
> ---
> You received this message because you are subscribed to the Google Groups
> "Materials & Welding" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to materials-welding+unsubscribe@googlegroups.com.
> For more options, visit https://groups.google.com/groups/opt_out.
>
>
>

--
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/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm

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.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.

Comments

Post a Comment

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

By Materials & Welding
Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...
Post a Comment
Read more

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more