GTAW is a slow process and we want productivity as the jobs are repetitive. Also the joint is about 2 metres in dia. and about 12 metres of weld length in one job. We have 150 such jobs to manufacture. Hence we are thinking of direct SAW right from the root pass.
Any suggestions on Direct SAW for single sided weld joint are welcome !!!
Regards
Prem Nautiyal
On Mon, 22 Sep 2008 Bathula Raghuram(Mumbai - PIPING) wrote :
>Why not GTAW+SAW? Full SAW may not give you full penetration + defect free in UT
>
>-----Original Message-----
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT NAUTIYAL
>Sent: Saturday, September 20, 2008 4:36 PM
>To: materials-welding@googlegroups.com
>Subject: [MW:1150] SAW - For Single sided joint
>
>
>
>
>Dear Friends
>
>We are trying to establish SAW for single sided joint. The base metal is SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but joint with included angle of 45degree ( one member is vertical and there is bevel on other member).The final NDT is UT.
>Presently we are welding this joint with TIG+SMAW.The joint is circular hence ideal for SAW.
>Now we want to try to weld this single sided joint completely with SAW. This is for productivity improvement.
>Is it possible to weld this joint having no access from other side with SAW completely ?
>Can we keep zero gap, zero rootface, and achieve full penetration joint with SAW??
>If yes what should be the parameters, wire dia., etc.
>We dont want to use any ceramic backing.
>Can anyone suggest how to weld this joint completely with SAW.
>This is a development activity. Please share your experience...
>
>Regards
>
>Prem Nautiyal
>
>
>PREM S NAUTIYAL
>CELL : 9820313278
>
>
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