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[MW:3266] Re: 3238] Shelf life of Low hydrogen electrodes

By Materials & Welding
 
Dear Rafique
Redrying is permitted only once.  But after completing the drying as recommended by the electrode manufacturer or as per your own procedure, you can reduce the temperature to 100 deg. C and maintain it for any number of days.
 
Gopu

--- On Sat, 19/9/09, Rafique Naik <rafiquenaik@hotmail.com> wrote:

From: Rafique Naik <rafiquenaik@hotmail.com>
Subject: [MW:3258] Re: 3238] Shelf life of Low hydrogen electrodes
To: "welding group" <materials-welding@googlegroups.com>
Date: Saturday, 19 September, 2009, 8:25 PM

Dear

Claes Gillenius,

Please let me know how many times re drying is permissible. If electrodes are not used and kept inside the oven, but oven is turn off for overnight.

Regards,

Rafique
To: materials-welding@googlegroups.com
Subject: [MW:3240] Re: 3238] Shelf life of Low hydrogen electrodes
From: claes.gillenius@esab.se
Date: Thu, 17 Sep 2009 12:41:08 +0200


If the electrodes are packed in air tight packages they can be used right away. If not, redry the electrodes in the way the manufacturer recommends, normally at a temperature around 300 - 350 °C.
Air tight packages are for example vacuum packages. If such a package is damaged and the vacuum lost, redy the electrodes. Redrying returns the electrodes to it´s original state.

Best regards,

Claes Gillenius
Development Engineer, MMA. (Spec. stainless and non Fe-alloys)
Direct tel:  +46 (0)31 509315
Mobile +46 (0)707532012
Company                ESAB AB
Address                  Box 8004, 402 77  Gothenburg, Sweden
                                 Lindholmsallén 9
Company  reg number        556005-7738



"Bathula Raghuram (Mumbai - PIPING)" <R.Bathula@ticb.com>
Sent by: materials-welding@googlegroups.com 2009-09-17 12:17
Please respond to
materials-welding@googlegroups.com
To
 <materials-welding@googlegroups.com>
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Subject
 [MW:3239] RE: 3238] Shelf life of Low hydrogen electrodes




Consult the consumable manufacturer, may be shelf life revalidated with additional testing. Code does not specify the shelf life, but the manufacturer does.


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ravindra T
Sent: Thursday, September 17, 2009 3:28 PM
To: materials-welding@googlegroups.com
Subject: [MW:3238] Shelf life of Low hydrogen electrodes
 
Dear All
 
Our contractor has brought low hydrogen electrodes (E 7018 & 8018) which are manufactured in 2007 for welding station piping in one of our intermediate pump station of our cross country pipeline project. I would like to know whether these electrodes can be used now?. Is there any reference in ASME code regarding the expiry/ shelf life of Electrodes?
 
Please advise me in this regard.
 
Thanking you all in advance
 
Ravindra
Senior Project Engineer





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