Dear JD,
It is always advisable to have smaller diameter electrodes for root welding to have good control over the welding parameters thus ensuring the complete fusion of the root. In normal cases (unless it is efficiently used with high skilled welders) 2.5mm dia. electrode is the right choice. If your still need to use 3.2mm you can use it, giving the required current parameters, and can achieve a good weld. (But if the client is insisting to use 2.5mm then better use it, as it is not a bad suggestion.)
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of joydev dalai
Sent: Monday, February 18, 2013 5:04 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:16800] WPS preparation of 48" API 5L x46 pipe.
Dear BR,
U r right our client insist to use 2.5 electrode , but we are poposed for 3.2 mm dia. as per asme dia of electrode is non essential. My question is that if we used 3.2 mm dia electrod, is there any problem?
On Mon, Feb 18, 2013 at 4:55 PM, Hamed <hamkan309090@gmail.com> wrote:
Dear Sir
I think your client insist to use 2.5 electrode because of complete penetration and fusion not because of the WPS restriction , correct ?
BR
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Binoy Soman
Sent: Sunday, February 17, 2013 10:33 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:16793] WPS preparation of 48" API 5L x46 pipe.
Dear,
According to QW-404.6, change in diameter of electrode is a non-essential variable(If there is impact test, change in dia greater than 6 mm is supplementary essential according to 404.7).
If no impact test is required, then you can just revise your WPS as per 200.1 (c ).
Thanks & Regards,
TEAM QA/QC- SHOAIBA II CCPP
S.Binoy, Welding Engineer
DAELIM Saudi Arabia Co. Ltd.
Email- binoy.spp@daelim.co.kr
Mob: 0592633853 / 0508308633
“Let Us Believe in TEAM Work (Together E veryone Achieves More)”
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of joydev dalai
Sent: Sunday, February 17, 2013 7:29 AM
To: materials-welding@googlegroups.com
Subject: [MW:16785] WPS preparation of 48" API 5L x46 pipe.
Dear all,
I have problem for preparation of WPS for 48" API 5L X 46,12.7mm wt. pipe, the WPS criteria meet as per ASME. We are suggest for E6010-3.2 mm dia electrode for Root pass, but our client can't accept for it.
They have suggest for E6010 - 2.5mm dia electrode.
so please suggest me
joydev dalai
Sr. Engg(QA/QC)
Fernas construction india Ltd.
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