Code Interpretations
Interpretation: IX-79-92
Subject: Section IX, Thickness Limitations for Procedure When Notch Toughness is Required, QW-403.5 and QW-403.6
Date Issued: September 25, 1979
File: BC78-791
Question (1): When impact test requirements are specified, does QW-403.5 apply in addition to QW-403.11 (for SMAW, SAW, GMAW, and GTAW) or instead of QW-403.11?
Reply (1): QW-403.5 applies in addition to QW-403.11. QW-403.11 is an essential variable so its requirements must be met.
Question (2): A test on P-No. 1, Group 2 has qualified P-No. 1, Group 2 to itself and P-No. 1, Group 1 to itself as permitted in QW-403.11. When impacts are required, which makes QW-403.5 an essential variable, will the original P-No. 1, Group 2 test without impacts plus a P-No. 1, Group 1 test, with impacts only, be sufficient to qualify P-No. 1, Group 1 and P-No. 1, Group 2 to P-No. 1, Group 2?
Reply (2): P-No. 1, Group 1 to itself is fully qualified; a new "impact only" test is required for P-No. 1, Group 2 which then also qualifies P-No. 1, Group 1 to P-No. 1, Group 2 as permitted in QW-403.5.
Question (3): Will a test on 3/4 in. T material with impacts plus an "impact only" test on 3/16 in. T material qualify the range 3/16 in. T to 1-1/2 in. T?
Reply (3): No. The 3/16 in. T plate qualifies to 2T which covers 3/16 in. to 3/8 in.; a plate just over 3/8 in. is needed to qualify 3/8 in. to 5/8 in. T. The 3/4 in. test qualifies 5/8 in. to 2T.
Question (4): If weld coupons are made using 1/2 in. thick plates separately for GTAW and SMAW processes (both multipass), can a 1/2 in. thick production plate be welded using GTAW for the root pass only and SMAW for the subsequent passes?
Reply (4): Yes; however, each process shall deposit a minimum of 3/16 in. per QW-451.
On Mon, Nov 1, 2010 at 7:28 PM, Arunachalam A <arunvani@gmail.com> wrote:
Code Interpretations
Interpretation: IX-79-94
Subject: Section IX, QW-403.5 Qualification of Welding Procedure with Notch Toughness in Materials of the Same P-No. but Different Group Numbers
Date Issued: October 9, 1979
File: BC79-630
Question: Is it the intent of QW-403.5 to permit qualification of two different Group number materials within the same P-No. welded to themselves by welding one Group material to the other Group material and impact testing the heat affected zone on both sides of the weld and the weld metal?
Reply: Yes, provided the same essential variables, including electrodes of filler metals, are used when welding each base metal Group to itself.On Mon, Nov 1, 2010 at 7:26 PM, Arunachalam A <arunvani@gmail.com> wrote:
Code Interpretations
Interpretation: IX-83-92
Subject: Section IX, QW-403.5
Date Issued: November 21, 1983
File: BC83-530
Question: A procedure has been qualified to satisfy all requirements, including notch toughness, for welding P-No.1, Gr-No.1 to P-No.1, Gr-No.1 base metals. Is it necessary to make a procedure qualification test to determine notch toughness only (QW-401.3) for welding P-No.1, Gr-No.2 to P-No. 1, Gr-No.2 base metals, with all other essential variables the same?
Reply: Yes.Copyright Reedy Engineering, Inc. & ASME--On Sun, Oct 31, 2010 at 9:12 AM, aneesh <aneeshgopi22@rediffmail.com> wrote:
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.SQA/QC ManagerGetabec Energy Co.,Ltd.379,Moo6,Soi8,Nikhomphatana,Rayong-21180,Thailand.
Phone: 0066 38 897035-8 (Off)Fax: 0066 38 897034Hand 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 allI 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.
aremandatoryfor supporting PQR.Please clarify whether Tensile test and bend test
Thanking you.
atul chaturvedi
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