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Re: [MW:6779] Polarity qualification?

By Materials & Welding
Hi,
For Welder Qualification,SMAW polarity is not an essential variable(QW353).If he qualifies with DCEP he can qualify for both.
But for PQR,Change in polarity is a supplementary essential variable.Then you have to follow QW409.4.
 
 
Thanks & Regards,
 
(karthik)

Karthikeyan.S
QA/QC Manager
Getabec Energy Co.,Ltd.
379,Moo6,Soi8,Nikhomphatana,
Rayong-21180,
Thailand.
Phone: 0066 38 897035-8 (Off)
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--- On Sat, 8/28/10, prem_nautiyal <prem_nautiyal@rediffmail.com> wrote:

From: prem_nautiyal <prem_nautiyal@rediffmail.com>
Subject: Re: [MW:6777] Polarity qualification?
To: materials-welding@googlegroups.com
Date: Saturday, August 28, 2010, 6:20 PM


Hi

If you are referring ASME Sec IX, then as per the table of QW-253 which talks about welding variables procedure specifications, refer QW-409.4 (Electrical characteristics), change in current or polarity is considered as supplementary essential variable for Impact requirements and Non-essential if you don't have any Impact requirements.


Regards

Prem Nautiyal

On Sat, 28 Aug 2010 15:26:12 +0530 wrote
>Dear all





If one qualifies in DCEP for SMAW,

Whats the range qualified for those either DCEP only or both (DCEP&

DCEN)?

any limits given in specs? where?





Thanks



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