Alan Denney
AKD Materials Consulting Ltd
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Demir Alp ILIKOBA
Sent: 17 October 2015 11:26
To: materials-welding@googlegroups.com
Subject: Re: [MW:23732] Cellulosic Electrode Usage Instead of Basic Electrode
Dear all ;
First of all thank You so much for Your most valuable replies ,Mr Gnanapandithan and Mr Rovinden and Mr Govindan.
Then please let me raise another question regarding our subject taking into account 7016 electrodes what would be Your commentary?
From the point of hydrogen content ,Exxx6 series are low hydrogen content electrodes besides low hydrogen its said deposition rates are higher than Exxx8 electrodes thus maybe it's better to advise Exxx6 electrodes instead of cellulosic electrodes?
Thanks again for your valuable thoughts and replies;
Best Regards;
Demir
On Sat, Oct 17, 2015 at 3:13 PM, Ramdoss Ravindiren <rdoss1986@gmail.com> wrote:
Dear all,
From production point of view, electrodes with higher deposition rates are being considered. But when it comes to quality, hydrogen induced cracking to be considered, hence basic coated electrodes are the best.
Still cellulose electrodes r being considered, have a control on preheat temp on pipe, if req as per code and baking of electrodes, to reduce the possibility of hydrogen.
Note: hydrogen in excess of 4ml / kg is prone to hydrogen induced cracking.
Regards,
RamFrom: Demir Alp ILIKOBA
Sent: 17-10-2015 02:06 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:23728] Cellulosic Electrode Usage Instead of Basic ElectrodeDear Sir;
I know i can't change 7018 to 7010 depending on same PQR thus i am also making preparation for a new PQR. So please take my question as application will be done on new PQR. Additonally i shall say their intention to use cellulosic electrodes on large pipes (i.e 96'').Your comments are appreciated.
Best Regards;
Demir
On Sat, Oct 17, 2015 at 1:21 PM, Perumal Govindan <perumalgovindan@gmail.com> wrote:
Hi
You can not replace the electrode, since SFA number, UTS & alloying element presence to meet the weld metal properties and WPS (approved) for pipe welding.
Regards
PGOn 17 Oct 2015 11:51, "Demir Alp" <demiralp85@gmail.com> wrote:
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