Dear Elshan,
Please refer to Annex- III, requirements for impact test, in AWS D-1.1. Clause III-3.3 allows only impact test to be carried out on weld coupons and be treated as a supplementary essential variable to the existing PQR. The extract from the code is:--
· III3.3 If CVN testing is a requirement and a qualified WPS exists which satisfies all requirements except for CVN testing, it shall be necessary only to prepare an additional test weldment with sufficient material to provide the required CVN test specimens. Test plate shall be welded using WPS, which conforms to the limitation requirements of Tables 4.1, 4.2, and 4.5, plus supplementary essential variables applicable only to CVN testing ( ref Table 4.6). A new or revised PQR shall be prepared and a new or revised WPS written to accommodate the qualification variables for CVN testing.
Repeat the impact testing as per the above analogy @ -300C, and revise your WPS to include the new PQR as a supporting document.
Thanks
Pradip Goswami,P.Eng
Senior Engineer/Specialist(Welding-Metallurgy)
Machine Dynamics & Component Integrity Dept.
Engineering & Training Services Division
ONTARIO POWER GENERATION Inc.
PO Box-2000, RR-55(South)
Nanticoke, Ontario,N0A1L0
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
(416) 231-4111, Ext 5925--in Kipling,Toronto
Fax: (519) 587-6814
From: elshan_f@hotmail.com
To: materials-welding@googlegroups.com
Subject: RE: [MW:3972] welding procedure for the material at - 30degree C
Date: Tue, 5 Jan 2010 13:16:07 +0400
the fabrication code is AWS D1.1. But couldn't find any explanation for such situations.
From: quality@gpsoman.com
To: materials-welding@googlegroups.com
Subject: Re: [MW:3970] welding procedure for the material at - 30degree C
Date: Tue, 5 Jan 2010 12:35:16 +0400
Dear Ellik,
Usage of same PQR depends upon your code of fabrication, Parent & consumable Material used for qualification & thickness of materials.
Some fabrication code does allow to use the same PQR without further impact testing as long the material (parent & consumable) itself qualified to use (up to certain lower temperature).
Sanjeevan
----- Original Message -----
From: Elshan Feyzullayev
Sent: Tuesday, January 05, 2010 8:57 AM
Subject: [MW:3965] welding procedure for the material at - 30degree C
Dear Friends,
I have a welding to do on the material where the service temperature is -30 degree C. I have got a welding procedure which charpy V test was carried out at -20 degree C. can I use this procedure for welding of the material which the service temperature is -30 degree C?
regards,
Elilk.
Windows Live: Make it easier for your friends to see what you're up to on Facebook.
--
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.
Windows Live Hotmail: Your friends can get your Facebook updates, right from Hotmail®.
--
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.
THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.
No comments:
Post a Comment