Dear Mr.Gohil,
As per my understanding even if the P number changes with in the limits, as you mentioned on the first mail, no separate qualification is required, but F number is also an essential variable as per the SEX 1X QW 353 & 356. So because of that you may have to do new qualification.
No qualification is required only if none of the essential variable data change. Just don't look only into P number but look into all essential variables.Technically speaking if P numbers are within the range no separate qualifications are required, but when P-number changes F-number may change which will lead to a new qualification.
regards,
Arun S Das
From: "pbrerode@gmail.com" <pbrerode@gmail.com>
To: materials-welding@googlegroups.com
Sent: Sat, 19 March, 2011 3:45:51 PM
Subject: Re: [MW:10436] Welder's qualification for diffrent steels and steel alloys.
| Dear Mr.Narendra Gohil, In the table QW-353 & QW-356 for base metal variable you have to look after QW 403.18 which states as follow, QW-403.18 A change from one P-Number to any other P-Number or to a base metal not listed in table QW/QB- 422, except as permitted in QW-423, and in QW-420.2. Finally regarding the base metal qualification for welder you have to follow QW-423 as per SEC IX. Regards, P.B.R P.BalajiRajan, Inspection Engineer, Velosi Certification LLC, P.O 3408 Doha-Qatar. -------Original Message------- From: Narendra Gohil Date: 3/19/2011 12:17:19 PM Subject: Re: [MW:10429] Welder's qualification for diffrent steels and steel alloys. That means mainly we have to follow QW-353(SMAW) or QW 356(GTAW) for welder qualification.And that clearly mentioning P no as essential variable for the base metals. So here even if my welder is qualified with CS.I have to go for separate qualification for low alloy steel as P no. is changing. Kindly correct me if my understanding is not correct. Thanks & rgds Narendra Gohil Welding Engineer QAFCO Ph.+974-44228289(O) From: Sukamal Naskar <sukamalbecmet@gmail.com> To: materials-welding@googlegroups.com Cc: Narendra Gohil <ngohil@qafco.com.qa> Date: 19/03/2011 11:52 Subject: Re: [MW:10428] Welder's qualification for diffrent steels and steel alloys. Sent by: materials-welding@googlegroups.com Dear Mr. Gohil, Whenever you will qualify any welder, you have to consider all the essential variables QW353, QW356. The F-No will chage for SMAW , and for GTAW may be the F-No wil be same. If all the essential variables of QW 353 (SMAW) and QW 356 (GTAW) dosen't change , then you can qualify the welders accordingly. Kind Regards, Sukamal Naskar Senior Welding Engineer Bohler Welding On Sat, Mar 19, 2011 at 11:36 AM, Narendra Gohil <ngohil@qafco.com.qa> wrote: Dear Experts, As per ASME sec.IX- QW423.1 mentioning Base metals for welder qualification and also mentioning qualified production base metals against that. Like; P-or S-No.1through P -or S- No.11,P- or S-No. 34,and P- or S-No.41 through P- S-No.49 and against that same grouping and range of P- or S-No. mentioned for qualified production base metals. That means if a welder qualified with as for example in CS(P no-1) welding(GTAW or SMAW any one ) with preheating and PWHT welding parameters,he can qualified with Low alloy steel like (P.No.4 or other in low alloy steel). I have been questioned by our Inspection experts and I don't have answer other than mentioned in QW401.2"essential variable"(Performance). Thanks & Rgds. Narendra Gohil Welding Engineer QAFCO Ph.+974-44228289(O) -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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. -- Sukamal -- -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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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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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