[MW:6759] Re: Polarity qualification?

Hi,

in 409.4, tat given as change in polarity?
For ex, My job is to be done with E 7016 DCEN, & E7018 DCEP.
i have qualified welder wit DCEP.
Is he qualifies to weld wit DCEN or not? Either in supplementary
essential or non essential.. how it will be?
pl explain........

On Aug 28, 3:28 pm, "PREM SHANKARDUTT NAUTIYAL"
<prem_nauti...@rediffmail.com> wrote:
> Hi
>
> If you refer ASME Sec IX, QW-253 table, which talks about the welding variables procedure specifications for SMAW, then refer QW-409.4 (electrical characteristics), which mentions that a change in current or polarity is Supplementary essential variable for Impact requirements and Non-Essential variable for Non-impact requirements.
> What is your case?
>
> 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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