I have individual qualified welders per BPVC Section-IX-2015, as per following detail:
1. P1,G1 TO P1,G1
2. P8,G1 TO P8,G1
Can I use the same welder for welding of following?
1. P1,G1 TO P8,G1
REPLY:
Read QW-350 will describe you the most common factors affecting the essential variables of process like dimater, thickness, t weld depostions, main factors in your case listed as per below,
1) Approved procedure (WPS) for your dissimilar.
2) Should not be change in F-no (WPS vs WPQ-Performance) same F.
3) Should not omit inert gas backing on the job.
4) Lastly clarity on P1,G1 TO P1,G1 and P8,G1 TO P8,G1 qualified welder to P1,G1 TO P8,G1 disimilar, for this scenario both welders can weld as this scenario will not have omit in backing gas , with same F nos on job and as per QW-423 table.
5) Refer QW-350, 408.8, QW-423 and QW-433
Concluding that if your production ensured with all common and main factorts above, then yes you can.
Regards,
Mohamed Muneeb Mahaboob
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U r correct!
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Souravbohray
Sent: 12 November 2018 11:17
To: Materials & Welding
Subject: [MW:28616] Welder qualification
Can't use because change in P no Nd u dnt hv qualified for p8 to p1. You have only p1 to p1 and p8 to p8.
you have qualified cs to cs and as to ss.
But u dnt hv qualified ms to ss .it's different u cnt use .if I m wrong correct me.
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Can't use because change in P no Nd u dnt hv qualified for p8 to p1. You have only p1 to p1 and p8 to p8.
you have qualified cs to cs and as to ss.
But u dnt hv qualified ms to ss .it's different u cnt use .if I m wrong correct me.
--
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Hi
Pl refer QW-350 for the essential variable for Welder.
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."
WPQ is not only depend on P numbers, there are other variables are also to be considered.
Pl check your essential variable against your welding process.
Example For SMAW,
Change in base metal P no is essential variable, i.e. QW- 403.18
Thanks and Regards
Rameshkannan Devaraj
"What you have learned is a mere handful; What you haven't learned is the size of the world – Avvaiyar"
--On Sun, Nov 11, 2018 at 7:49 AM Surendra <skchordia.bhl@gmail.com> wrote:Hello,--I have individual qualified welders per BPVC Section-IX-2015, as per following detail:1. P1,G1 TO P1,G12. P8,G1 TO P8,G1Can I use the same welder for welding of following?1. P1,G1 TO P8,G1Thanking You,SurendraBhilwara, Rajastha(Ind)
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