Welder qualification

[Ganesh Muthurajan]

Hi gentlemen 

I have doughty in welder qualification. 

The welder having two jcc.

1. GTAW - OD - 1inch, Thickness- 11.08mm, P no. 34, F no 34

2. GTAW+SMAW - OD - 2 7/8 Inch, Thickness - unmimited, P No. 1, F no. 6.

Now my doubt is 

The welder can weld ?

1. CuNi - 12.7 mm thickness 

2. CS - 1" OD

How? If not why?

[RANEESH PK]

  Refer ASME SEC IX Table  QW-452.3  

1. Welder can weld max 11.08 thickness as per your JCC. So cant able to weld 12.7 mm thick job

2  The welder can weld minimum dia 2 7/8 inch (73mm) OD  to unlimited as per your JCC,So cant able to weld 1 inch OD.

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[Vishwas Keskar]

1. CuNi - 12.7 mm thickness  -  Not permitted 

    Reason - 

    F NO  34 - Welder qualified up to 11.08  mm only .

    Maximum metal qualified  is qualified using F NO 6  filler wire  and NOT with F NO 34 

2. CS - 1" OD -  Not permitted

    Reason - 

     Welder qualified  from   OD 73 mm   and above  with F NO 6 .

      So P NO 1  + 1 "  OD  using F NO 6  filler wire is not permitted 

  F NO of one qualification  and   diameter  of other qualifications can not be  considered for production welding.

  

On Sun, Mar 7, 2021 at 11:26 AM Ganesh Muthurajan <qcen...@gmail.com> wrote:

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[james gerald]

Please find below the Essential variables for GTAW welder qualification. Any change in one essential variable as dictated by the other relevant portions of the code require new welder qualification.

Thanks & Regards

J.Gerald Jayakumar

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