Re: [MW:10961] Diameter of electrode-reg

Dear All,

 

The Dia. of electrode (< 6 mm ) is non essetial variable as per ASME Sec. IX.  However some of Cleint specifications ( Ex. Qatar Petrolium Specifications) mentioned that size of electrode used for capping in PQR only can be used for actual production also.  As per client specification the macro harndness is one of the test for procedure qualifcaiton.  If the electrode for  capping pass is larger than the PQR, then hardness at toe of welds will be higher than obtained in actual PQR due to higher heat input.    Thatswhy the size of electrode for Capping pass is essential variable as per some of client specifications.

On Thu, May 5, 2011 at 6:48 AM, Fitria Rahman <t.chintaqa@gmail.com> wrote:

Dear Ilangkumaran

qw 353 did not specify the diameter of electrode. The essential variable is "t" which means thickness of weld deposit.
Legend for QW-352 through QW-357: Ø should be read as "change" (not diameter).

have a nice day

2011/5/3 k.ilangkumaran ilangkumaran <k.ilangkumaran@yahoo.com>

Dear Experts,                   Thanks for your answers. But QW404.06 of SEC IX  says something Can anybody go through it and explain me?   Regards Ilangkumaran --- On Tue, 5/3/11, vijay <vijayakumarme@gmail.com> wrote: From: vijay <vijayakumarme@gmail.com> Subject: Re: [MW:10924] Diameter of electrode-reg To: materials-welding@googlegroups.com Date: Tuesday, May 3, 2011, 6:38 AM Dear Ilangkumaran, Mr.Pandithan is Right Electrode Diameter is a Supplementary essential variables means Applies only when there is a Impact Requirement.  Otherwise deviation of Electrode diameter from the qualified WPS is not a problem as per ASME IX Regards, VIjay On Sun, May 1, 2011 at 10:46 PM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote: only when there is impact requirement, then change in dia greater is essential, otherwise no problem It is always use small electrode to avoid more heat input and for slang inclusion pandithan On Sat, Apr 30, 2011 at 3:22 PM, k.ilangkumaran ilangkumaran <k.ilangkumaran@yahoo.com> wrote: Dear Experts,                  While my routine inspection of welding I have noticed Diameter of the electrode used for the capping was not as per the qualified WPS and I was told the diameter of the electrode is not an essential variables.     WPS for SMAW   Now as per the sec IX; Table QW-253   1) the essential variable QW-404.30   2) Supplementary variables QW-404.7/.12   3)  Non essential varaiable QW-404.6          & as per the QW-353   1) QW-404.15/.30 were the essential variables for welder qualification.   So if the diameter of electrode used in production welds beyond 6mm then only the WPS needs to be re written? or Should we insist the welder to use what ever mentioned in the qualified WPS? or the welder should use the electrode that he used while performing his WQT. Can somebody expain me in details how to deal this?   Regards Ilangkumaran   -- 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/ 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. -- 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/ 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. -- 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/ 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.

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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.