I've seen this type of error before. Your client is not taking into account that only those variables assigned to a process in Tables QW-252 through QW-269 apply to that process. Article IV QW-400 is simply a catalog of all variables for all process and weldor qualification. One cannot simply, randomly select variables from the catalog and apply it wherever they want. Variable QW-403.12 is a variable that is specifically applied to the plasma arc welding process (PAW). It is specified only in QW-357 and QW-369. It cannot and should not be applied to any other process.
Tell your client to read QW-401:
Each welding variable described in this Article is applicable
as an essential, supplementary essential, or nonessential
variable for procedure qualification when referenced
in QW-250 for each specific welding process.
I didn't find any specific interpretation either. I suspect the Code committee would consider such an enquiry "consulting" and therefore not justify addressing it. Just my opinion - that and $3 will get you a cup of coffee at Starbucks.
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of george.dilintas@gr.bureauveritas.com
Sent: Wednesday, March 12, 2014 11:38 AM
To: materials-welding
Subject: Re: [MW:20316] RE: 20296] QW-403.12 in ASME IX
Thanks a lot.
Client is arguing GTAW and SMAW arcs could be with some adjustments concentrated heat sources and thus he can apply 403.12. I did not agree on this and he replied that there is a interpretation on this. I have looked for a such interpretation and I found nothing. Apparently there is not
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager
From: "John Henning" [jhenning@deltak.com]
Sent: 03/12/2014 10:21 AM EST
To: <materials-welding@googlegroups.com>
Subject: [MW:20305] RE: 20296] QW-403.12 in ASME IX
Dr. Dilintas,
I assume that you are looking at QW-424.1. If that is the case it is prescriptive as to what P-No. is qualified by the various qualifications. It is also clear that for the low alloy steels, a PQR performed with the higher alloy materials will qualify the higher alloy to the lower; e.g. P5A to P5A PQR can qualify WPSs welding P5A to P5A, P5A to P4, P5A to P3, or P5A to P1. As well you know, a P5A to P5A PQR does not qualify a WPS for P4 to P4, etc. only the dissimilar combinations above. Of course those permitted dissimilar combinations are eliminated if impact testing is required due to G-No. requirement.
P45, not being specifically listed in the prescriptive list in QW-424.1, thus falls under the first category "one metal from a P-number to any metal from the same P-number" qualifies "any metals assigned to that P-number." Or if a dissimilar metal PQR is made, then the third listing applies with the qualification being "Any metal assigned the fires P-number to any metal assigned the second P-number".
You might want to offer your client Interpretation IX-10-39 which queries whether P5B to P5B PQR can be consider for WPS of P5B to lower alloys for which the answer was "No". Since P5B is ferritic, it is even a closer match than P45 to the listed materials in QW-424.1 so that clearly, by extension, P45 is not included either.
Also, you might want to look at Question & Response (2) to Interpretation IX-80-63. The response was "Only those P-No 5 base metals with a maximum Cr content of 3% may be welded to lower P-Number base metals for the procedure qualification cited in the question". Again by extension, P45 materials have more than 3% Cr.
Perhaps your client is confusing performance (weldor) qualification rules with those for welding procedure qualification? For weldor qualification QW-423.1 would allow the use of carbon steel or low alloy materials in lieu of P45 base metal as weld qualification is only concerned with the ability of the weldor to make a sound deposit.
Hope some of this helps.
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of george.dilintas@gr.bureauveritas.com
Sent: Wednesday, March 12, 2014 5:21 AM
To: materials-welding@googlegroups.com
Subject: [MW:20296] QW-403.12 in ASME IX
Does any body knows if the above clause can be applied in case of SMAW, GTAW, GMAW, SAW qualifications?
On my opinion it can not be applied, so a PQR with Pno 5A can not qualify a WPS with Pno 1 or Pno 4, but I have a client who insists that Pno45 qualifies Pno 1 and 4.
Is there any interpretation or Code Case on this?
best regards
Dr. Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
API 510 Inspector
I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)
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