detecting the LOF specially at side walls, and by the way Saudi Aramco
made that as a mian requirement now whenever there will be
conventional short circuit, advanced (STT, RMD) or even mechanized
welding FCAW to use AUT as a main inspection method for inspection
this particular type of joints and regarding qualification you can
follow the previous replies which stated that bend test will open the
LOF up
Mostafa
On May 26, 11:25 am, <Prakash.Ve...@akersolutions.com> wrote:
> Hi Abhishek,
>
> GMAW Process short circuit have a tendency to give LOF.LOF is hard to find during RT.Mech. Testing Side bend testing opens up a LOF:
> Hope this will help you out.
>
> Thanks
>
> Regards,
> Prakash Verma
>
> Aker Drilling Risers
> Aker Solutions
> MOBILE - 0047-40466591
> DESK- 0047-22945932
> Email: Prakash.Ve...@akersolutions.com
>
> ________________________________
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of John Henning
> Sent: 25. mai 2011 17:45
> To: materials-welding@googlegroups.com
> Subject: [MW:11144] RE: 11128] QW 304: Welders
>
> Short-circuiting mode GMAW receives special treatment because it has a history of welds being made with small, tight lack of fusion defects both at the side wall and between weld beads/layers. These are typically not detectable by RT but will open up when bend tested. These defects are the result of weldor technique. Understand that RT is an exemption/or permitted substitution for the required bend testing In this case the use of RT as an exemption/substitution is not extended to the GMAW-S process.
>
> John
>
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ABHISHEK GHOSH
> Sent: Monday, May 23, 2011 3:17 PM
> To: materials-welding@googlegroups.com
> Subject: [MW:11128] QW 304: Welders
>
> Dear Experts,
>
> As per ASME IX
>
> QW-304 Welders :
>
> Except for the special requirements of QW-380, each welder who welds under the rules of the Code shall have passed the mechanical and visual examinations prescribed
> in QW-302.1 and QW-302.4 respectively. Alternatively, welders making a groove weld using SMAW, SAW, GTAW, PAW, and GMAW (except short-circuiting mode)
> or a combination of these processes, may be qualified by radiographic examination,
>
> WHY SHORT- CIRCUITING MODE IS EXCEPTIONAL ???
>
> Regards.
>
> Abhishek Ghosh
>
> --
> ABHISHEK GHOSH
> FAHAHEEL, KUWAIT
> MOB: (00)965-60303798
>
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