Re: [MW:14764] Impact test qualification requirement for WPS/PQR

Dear Asad Azmi,

PQR 2 can be used to deposit 21mm thick weld if other essential and supplementary essential variables are same as PQR 1, since "T limits impact" (QW-403.6) has limitation only on min. thickness qualified.

Regards

Gogulu Kumar 

On Wed, Mar 14, 2012 at 4:01 PM, asad azmi <azmiasadayub@gmail.com> wrote:

Dear All,

 

Greetings.

 

A vessel is being fabricated as per ASME SEC VIII DIV 1.

 

Vessel material is SA 387 GR 12 CL2, 65 THK. MDMT is   -18 DEG CELCIUS.

 

Approved WPS is supported by  2 PQR  detailed as below --

 

PQR 1

 

Test coupon thickness - 40 mm ,

Welding process used - GTAW + SMAW + SAW ,

Weld deposit by SMAW  Process is 19 mm.

Weld deposited by SMAW  is impact tested at   0 deg celcius.

 

PQR 2

 

Test coupon thickness - 10 mm ,

Welding process used - GTAW + SMAW ,

Weld deposit by SMAW  Process is 8 mm.

Weld deposited by SMAW  is impact tested at    - 18 deg celcius.

 

Whether  PQR  2 can be used for SMAW  Process to deposit  21 mm weld in a weld groove of 65 mm in depth .( for closing seam of shell to dished head & nozzle to dished  head weld seam)

 

Please advice. please give ASME SEC IX Reference.

 

Thanks & Regards

 

Asad Azmi

 

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Regards

Gogulu Kumar

+919765804701

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