Google Groups
Subscribe to Materials & Welding
Email:
Visit this group

Thursday, February 4, 2010

RE: [MW:4205] Welding Electrode Expire Date

Hi Louis & Yanferizal,

 

Thanks for your query and answers.

 

Discussion thread, (MW-3238, Sept-2009) Shelf life of Low hydrogen electrodes provides some snapshots of intense discussion on the above topic.

 

It’s true that boiler or pressure vessel codes or structural welding codes do not specify the shelf-life or expiry dates of welding electrodes. For example, ASME Nuclear Codes Sec-III, Clause & NB, NC-2440 specifies that:- Suitable storage and handling of electrodes, flux, and other welding materials shall be maintained. Precautions shall be taken to minimize absorption of moisture by fluxes and cored, fabricated, and coated electrodes.

 

The shelf-life of welding electrodes to a great extent depends on electrode manufacturer’s methods, quality control procedure and how electrodes are handled. Depending on the coating type, packing (hermetically sealed or not), storing methods and ambient conditions, humidity etc, electrodes may last long or less. However as a good practice and based on electrode manufacturer’s guidelines it may be worth considering:-

 

·        Solid Wires, GTAW/GMAW-No shelf Life.  

·        Cored Wire –FCAW-  No shelf life

·        SMAW – The rule should be FIFO (First in First Out). Electrodes where the coating shows sign of flaking, cracks etc certainly should be discarded without much thoughts. Electrodes not older than 2-3 years but in good condition may be used. If required the diffusible hydrogen test could be repeated. Electrodes older than 3 years generally should not be used as a good engineering rule.

·        SAW Fluxes- Shelf life 2-3 years maximum subject to the flux condition and amount of fine particles/dust generated and behavior during welding

 

It would be definitely useful to get the inputs from other forum members, especially from consumable manufacturing industries.

 

Thanks.

 

Pradip Goswami, P.Eng

88,Garth Trails Crescent

Hamilton,Ontario, L9B2X1,Canada

Email-pgoswami@sympatico.ca

Email-pgoswami@quickclic.net

Tel-905-679-9677


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of A D
Sent: Wednesday, February 03, 2010 12:39 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4192] Welding Electrode Expire Date

 

Hi,

       Electrode (SMAW) expiry detail is not given by any codes. May be you can check

with your electrode manufacturer.

wire consumables (without flux) is not issue for expiry, we can use anytime if we keep

in proper storage.

In stick electrodes, flux may be loosened (unbounded) due to long storage.

 

 

Louis

--- On Wed, 3/2/10, yferizal@gmail.com <yferizal@gmail.com> wrote:


From: yferizal@gmail.com <yferizal@gmail.com>
Subject: [MW:4187] Welding Electrode Expire Date
To: materials-welding@googlegroups.com
Date: Wednesday, 3 February, 2010, 8:13 AM

Dear All,
Anyone could inform me the welding electrode expiration date since manufacture (eel 1 year, 2 year etc)  it is not mentioned in the electrode certificate.
Is there any statement in Code/standard for this?
Best Regards,

Yanferizal
Powered by Telkomsel BlackBerry®

--
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.




Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

--
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.

No comments:

Blog Archive