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[MW:2309] WPS/PQR with PWHT for a welded component.

By Materials & Welding
its tricky issue and and depends on contract, order requirements, i
have similar situation in the past.
there was requirement for few reducing elbows of large size (>36" with
different dia at two ends) on suction side of a pump. since it is a
special item, it is designes as per ASME sec VIII div 1 and order was
placed on a vendor X.

Now vendor X sub ordered it to vendor Y as SA 234 WPB, made from plate
SA516 Gr 70. and got it, up to this stage its fine.

later vendor X welded an out let nozzle in his shop and PWHT'ed the
entire elbow. The vendor Y used a WPS without PWHT for long seam of
elbow. however vendor X used a WPS with PWHT for nozzle welding.
and even got the ASME stamp.

What happened to long seam of the elbow which is subjected PWHT?


On Jun 2, 11:21 am, Shank Vagal <nach_...@yahoo.com> wrote:
> PWHT is an essential variable; you have to re-run the PQR.
>
> --- On Tue, 2/6/09, abbey kangale <abhian...@yahoo.com> wrote:
>
> From: abbey kangale <abhian...@yahoo.com>
> Subject: [MW:2297] Casting WPS/PQR
> To: materials-welding@googlegroups.com
> Date: Tuesday, 2 June, 2009, 8:55 AM
>
> Dear All
>  
> I have case for CF8M casting for Valves as per B16.34 which involves welding for internal cage fittment and ...
> Foudry has done welding and then they carryout subsequent Heat Treatment 1070Deg cel.to satisfy CF8M heat treatment requirement.
>  
> When we asked for WPS/PQR foundry has submitted WPS/PQR for welding without PWHT and PQR is qualified without Heat Treatment requirement and for which I had taken a objection .
>  
> Can Group advise my objection rersolution and corrective action as casting are ready for valve asssembly for our project
>  
> Abhijit

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