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Re: [MW:7994] Supporting PQR for Impact requirements

By Materials & Welding

Group No is a supplementary essential variable, so take care in case the construction code requires impact test,
then if you change the group no, within the same P No, you have to re -qualify the WPS


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Inactive hide details for "aneesh " <aneeshgopi22@rediffmail.com>"aneesh " <aneeshgopi22@rediffmail.com>


    "aneesh " <aneeshgopi22@rediffmail.com>
    Sent by: materials-welding@googlegroups.com

    31/10/2010 07:12

    Please respond to
    materials-welding@googlegroups.com

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    "materials-welding &" <materials-welding@googlegroups.com>

cc


Subject

    Re: [MW:7955] Supporting PQR for Impact requirements

Ref



Karthik Sir,

Is it possible to write a WPS with base metal (QW-403) P No. 1 Gr No.1 to P No.1 Gr.No.1 OR 2 ?

so possible P1GI P1G1, P1G1 P1G2 & P1G2 P1G2 Welding.

QW-403.5 is not telling to do the test again for new group no. of the same P no. material with same E&SE variables? (interpretation)

So re writing a WPS is enough for PIG1 to P1G2 welding with the current PQR , insted of further testing ?


Please advice........... I have the same issue.

Regards
Aneesh
KSA



On Fri, 29 Oct 2010 18:36:00 +0530 Karthik karthik6684@yahoo.com wrote
Hi,

If Impact is required by Code then you have to do additional supporting PQR(CVN test only) for G2.

My interpretaion for QW403.5 as follows.

QW403.5:

If, however, two or more
qualification records have the same essential and supplementary
essential variables, except that the base metals
are assigned to different Group Numbers within the same
P-Number, then the combination of base metals is also
qualified.

Interpreation:

As per the above highlighted sentence,If you have to PQR with CVN test of P1G1 with P1G1 and P1G2 to P1G2,then you can use this for P1G1 with P1G1, P1G2 to P1G2 , and P1G1 to P1G2 also.

In your case you have P1G1(with CVN) PQR only.So you
should do additional supporting PQR for G2.

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)
Fax: 0066 38 897034
Hand Phone: 0066 892512282

--- On Fri, 10/29/10, Vikas Bhandari <vikas.bhandari349@gmail.com> wrote:


    From: Vikas Bhandari <vikas.bhandari349@gmail.com>
    Subject: Re: [MW:7929] Supporting PQR for Impact requirements
    To: materials-welding@googlegroups.com
    Date: Friday, October 29, 2010, 3:01 PM
    Dear all

    I could not find the reason to do the CVN test again for new group no. of the same P no. material. Assuming the welding process is SMAW, then as per QW 403.5, " If , however, 2 or
    more qualification records have same essential and supplementary essential variables, except that the base metals are assigned to different group numbers within the same P number, then the combination of base metal is also qualified"

    Pls do tell me if that is the not the case, and CVN testing is mandatory (kindly specify the relevant section from the code)
    On Thu, Oct 28, 2010 at 12:34 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:






      Yes, you can, provided all essential/supplementary
      essential variables are identical to original PQR.


      From:
      materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On
      Behalf Of       atul chaturvedi
      Sent:       Thursday, October 28, 2010 4:53 PM
      To:       materials-welding@googlegroups.com
      Subject:       [MW:0] Supporting PQR for Impact requirements



      Dear All,




      I have Qualified PQR for welding P1 Gr 1 To P1 Gr 1 with
      Impact test at (-) 51°C



      thickness range 2.77 to 11.08 mm.



      But now we have to weld P1 Gr 1 to P1 Gr 2. Can I do one
      more supporting PQR with with P1 Gr 1 to P1 Gr 2 With only impact testing.



      Please clarify whether Tensile test and bend test
      aremandatoryfor supporting PQR.







      Thanking you.



      atul chaturvedi










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