[MW:2307] Re: Casting WPS/PQR

First option; Ask the vendor to qualify a WPS with the same type material and heat treatment (sol annealing) as used on the castings.
Second option; if this is a standard practice followed by the vendor since long time than vendor may take guarantee for weld strength and corrosion properties and considering cage only an internal non-pressure component a concession can be granted provided vendor is a reputed one.


Regards,

abbey kangale <abhianu12@yahoo.com> Sent by: materials-welding@googlegroups.com 02/06/2009 11:25 AM Please respond to materials-welding@googlegroups.com

To materials-welding@googlegroups.com cc Subject [MW:2297] Casting WPS/PQR

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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