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[MW:1161] Re: 1150] SAW - For Single sided joint

By Materials & Welding
Dear Prem,
 
To weld with just SAW from one side itself, you need to provide zero root gap with 5mm root face at the beveled member. Use current 550-600 Amps and try. I do not see any problem to get the root fusion.
 
C. K. Purohit
General Manager - QA/QC/NDT/R&D
KNM Process Systems Sdn Bhd.
HP :    +616 3376448
Phone : +603 89460338
Fax   : +603 89460333

-----Original Message-----
From: "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com>
To: <materials-welding@googlegroups.com>
Date: Mon, 22 Sep 2008 20:06:19 +0530
Subject: [MW:1158] RE: 1150] SAW - For Single sided joint

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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