Re: [MW:10936] Diameter of electrode-reg

Dear all,

 

1. During WQT with E7018 , Uphill technique,welders having problem to control undercut in capping by using 3.2 mm dia electrode. but with 2.5 mm dia its ok, My client ask them to use 3.2 mm electrode for capping . How to solve this one...........

 

2. In pipeline down hill welding which electrode is preferable mostly & why : E8010 OR E 8045 p2.

 

Thanks & regards.

 

Abhishek Ghosh

On Tue, May 3, 2011 at 4:08 AM, vijay <vijayakumarme@gmail.com> wrote:

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

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ABHISHEK GHOSH
FAHAHEEL, KUWAIT
MOB: (00)965-60303798

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