Hi Limesh,
PQR qualified to weld P1G1-to-P1G2 can be used to write WPS covering P1G1-to-P1G1 & P1G1-to-P1G2.
Plz note that the design code is B31.3. And if there is any project/client requirement that requires WPS/PQR to be qualified as per B31.3, then the thickness range for the WPS shall comply as per Table 323.3.1, B31.3 i.e., [ t/2 –TO- t+6 ]. This will actually increase the stringency on the qualification process and also require more no. of PQR's to cover the required thickness range, thus more money & effort.
If B31.3 for WPS/PQR qualification is not applicable, then thickness range as per Sec-IX holds true.
On overall general basis - Limiting the no. of available WPS & incorporating larger no. of combinations in one WPS is advisable so as to have less no. of WPS and more ease & generalization in the reporting/survellience and document control. But sometimes this data may inadequately interpreted/mislead due to ignorance or insufficient understanding of those following it.
Hope the above helps.
Regards,
Puru.
Yes, you can
"when base metals of two different P-Number Group Number combinations are qualified using a single test coupon, that coupon qualifies the welding of those two P-Number Group Numbers to themselves as well as to each other using the variables qualified".
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of limesh M
Sent: Tuesday, October 26, 2010 3:11 PM Subject: Re: Fw: [MW:7819] ASME BPV SEC IX Material Range issue
Dear All,
Lot of confusion still remaining even after many reply.So I deleted my extra queries for better clarification.Seniors, please advise me on this subject.It is most urgent.
Design Code – ASME B31.3
Welding Code – ASME BPV SEC IX
I have a PQR for the following material classification as per ASME BPV SEC IX
Material Used for PQR – P1 Group No.1 To P1 Group No.2
Weld Metal Impact Tested – YesPWHT done on weld metal - Yes
1. Can I weld P1 Group No.1 to P1 Group No.1 based on above supporting PQR(Suppose,I am following all essential variables as per above PQR)?
2. Can I weld P1 Group No.2 to P1 Group No.2 based on above supporting PQR(Suppose,I am following all essential variables as per above PQR)?
Regards,
Limesh
On Tue, Oct 26, 2010 at 7:36 AM, Karthik <karthik6684@yahoo.com> wrote:
Hi,
As per QW250 Change in group number is a supplementary essential variable.If Impact test or PWHT ec.,is not applicable then P1 G1 to P1 G2. WPS can be used to weld P1 G2 to P1 G2.
Please note that there is no P2 in ASME.
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 Tue, 10/26/10, Kathalingam Babu <kathalingam.qaqc@ppl.com.sg> wrote:
From: Kathalingam Babu <kathalingam.qaqc@ppl.com.sg>
Subject: Re: Fw: [MW:7798] ASME BPV SEC IX Material Range issue
To: materials-welding@googlegroups.com
Date: Tuesday, October 26, 2010, 7:55 AM
Aneesh,
Regarding the Query No.2, the actual PQR is P1 G1 to P1 G2. So is it possible to weld P2 G2 to P2 G2 as per QW 403.5?
You cannot weld P2 G2 to P2 G2 with existing P1 G1 to P1 G2 qualification
Regards
K.Babu
----- Original Message -----
From: Karthik
Sent: Monday, October 25, 2010 11:31 PM
Subject: Re: Fw: [MW:7793] ASME BPV SEC IX Material Range issue
Hi,
Yes. Can write if impact test is not applicable.
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 Mon, 10/25/10, aneesh <aneeshgopi22@rediffmail.com> wrote:
From: aneesh <aneeshgopi22@rediffmail.com>
Subject: Fw: [MW:0] ASME BPV SEC IX Material Range issue
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Monday, October 25, 2010, 8:28 PMKarthik Sir,
Regarding the Query No.2, the actual PQR is P1 G1 to P1 G2. So is it possible to weld P2 G2 to P2 G2 as per QW 403.5?
Please correct me if I am wrong.
Regards,
Aneesh
KSA
On Mon, 25 Oct 2010 11:32:50 , Karthik wrote
Hi,
.As per QW403.5 you can use.Please find below the answer for your quiries marked in RED.
Quiery No.1
1. Is there any problem for welding P1 Group No.1 to P1 Group No.1 & P1 Group No.2 to P1 Group No.2 based on above PQR?
QW403.5
For ferrous materials in table QW/QB-422, a procedure
qualification shall be made for each P-Number Group Number
combination of base metals, even though procedure
qualification tests have been made for each of the two
base metals welded to itself. 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. In addition, when base metals of two different
P-Number Group Number combinations are qualified using
a single test coupon, that coupon qualifies the welding of
those two P-Number Group Numbers to themselves as well
as to each other using the variables qualified.
This variable does not apply when impact testing of the
heat-affected zone is not required by other Sections.
Quiery No.2
2. Can I write separate WPS (with impact test) based on above PQR for,
Material – P1 Group No. 1 to P1 Group No. 1
Material – P2 Group No. 2 to P2 Group No. 2
QW200.2 (f) Multiple WPSs With One PQR/Multiple PQRs With
One WPS.
Several WPSs may be prepared from the data
on a single PQR (e.g., a 1G plate PQR may support WPSs
for the F, V, H, and O positions on plate or pipe within
all other essential variables). A single WPS may cover
several essential variable changes as long as a supporting
PQR exists for each essential and, when required, supplementary
essential variable [e.g., a single WPS may cover
a thickness range from
1⁄16 in. (1.5 mm) through 11⁄4 in.
(32 mm) if PQRs exist for both the
1⁄16 in. (1.5 mm) through
14
3
⁄16 in. (5 mm) and 3⁄16 in. (5 mm) through 11⁄4 in. (32 mm)
thickness ranges].
Quiery No.3
Is there any problem for showing all material range in a single WPS based on above PQR?
Ie, qualified range of materials- P1 Group No. 1 & P1 Group No. 2 in the same WPS.
No problem.You can write all material range as much as possible within the P number specified in the WPS
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 Sun, 10/24/10, limesh M <limesh78@gmail.com> wrote:
From: limesh M <limesh78@gmail.com>
Subject: [MW:7767] ASME BPV SEC IX Material Range issue
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Sunday, October 24, 2010, 9:42 PMDear All,
I need your help in the following subject.
Design Code – ASME B31.3
Welding Code – ASME BPV SECTION IX
I have a PQR for the following material classification as per ASME BPV SEC IX
Material – P1 Group No. 1 to P1 Group No. 2
Weld Metal Impact Tested – Yes
My query is that,
1. Is there any problem for welding P1 Group No.1 to P1 Group No.1 & P1 Group No.2 to P1 Group No.2 based on above PQR?
2. Can I write separate WPS (with impact test) based on above PQR for,
Material – P1 Group No. 1 to P1 Group No. 1
Material – P2 Group No. 2 to P2 Group No. 2
My next query is that,
Is there any problem for showing all material range in a single WPS based on above PQR?
Ie, qualified range of materials- P1 Group No. 1 & P1 Group No. 2 in the same WPS.
Regards,
Limesh
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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