Dear Jhon SirAs per QW 423.1 -unassigned material with similar chemical composition also included,in that case no need to go further new performance qualification if unassigned material have similar chemical composition with previous any qualification ,This is my interpretation, is correct or not please advise.With RegardsHasin Shaikh--On Mon, Dec 4, 2017 at 9:22 PM, John Henning <jhenning@deltak.com> wrote:No welder requalification is not required, provided all other requirements of QW-353 are met, and only Section IX qualification is required..
While Table QW-353 states QW-403.18 is an essential variable one has to look further. QW-403.18 states:
So one has to look again further at QW-423, Alternate Base Materials for Welder Qualification: There is no distinction made between P8 and P10H as far base material required is concerned. In fact the welder could have qualified using P1 base materials for both P8 and P10H base metals.
However, customer requirements may restrict qualification.
Clearly, applying the first instance in QW-423.1, performance qualification with P8 material
From: materials-welding@googlegroups
.com [mailto:materials-welding@googlegroups.com ] On Behalf Of PGoswami
Sent: Monday, December 04, 2017 9:28 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:27111] Qualifications of welders
A new qualification is required in this case. Qualification on other austenitic stainless steels(P No 8) does not permit the validity of qualification for duplex stainless steels (P No 10H). It's clearly stated under QW-353, please see the extract below.
F No for both ASS and DSS are the same, F5 for SMAW (SFA 5.5) and F6 for GTAW/GMAW(SFA 5.9).
Thanks.
P.Goswami.P.Eng, IWE.
Welding & Metallurgical Specialist
Linkedin: https://www.linkedin.com/in/pr
adip-goswami-2999855/ Email:pgoswami@quickclic.net,p
radip.goswami@gmail.com
QW-351 GENERAL
A welder shall be requalified whenever a change is
made in one or more of the essential variables listed for
each welding process
From: 'ms viswanathan' via Materials & Welding [mailto:materials-welding@goog
legroups.com ]
Sent: December 4, 2017 7:23 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:27109] Qualifications of welders
Yes, I agree .Thanks for your guidance.
Regards, M.S.Viswanathan
On Monday, December 4, 2017 1:46 PM, Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:
MSV
pl see QW 416,423.
A no is at all essential variable for welding performance qualification. Let us not misguide the people.
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KG.PANDITHAN, BE, IWE, AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY
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On Mon, Dec 4, 2017 at 3:51 PM, 'ms viswanathan' via Materials & Welding <materials-welding@googlegroup
s.com > wrote:No, because DSS - P number is 10H and A.No-7 and .S.S- P number is -8 and A.No 8 , essential variables.
Regards, M.S.Viswanathan
On Monday, December 4, 2017 12:42 PM, foued oudina <oudinafou21@gmail.com> wrote:
Dear Colleagues ;
Could you please help me, we have welders qualified in SS they can weld DSS.
Thanks
OUDINA FOUAD | QC Welding OFF PLOT
Técnicas Reunidas Group
TouatGaz Project – EPCC Processing & Production Facilities
Field Engineering Group
Oued Zine, Adrar, Algeria
( Ext. 3912
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