Re: [MW:16564] PWHT soaking Time on SS Overlay

not permitted as per code


On 1/21/13, Prakash Hegde <pb.hegde@yahoo.com> wrote:
> Dear Mr Venu
>
> For  weld overlay of( Corrosion resistance) A8  on P1 ,P4,P5 etc if PQR
> undergoesPWHT the Clause QW407.9 applies i.e.If  PQR qualifies  for alify
> for max 20hrPWHT with 1hr soaking time will qualies for 20hrs max for job
>
> Regards
>
> Hegde Prakash
>
>
> ________________________________
> From: venu moturu <moturuvenu@yahoo.com>
> To: "materials-welding@googlegroups.com"
> <materials-welding@googlegroups.com>
> Sent: Saturday, 19 January 2013 2:04 PMear Mr Venu
> Subject: [MW:16544] PWHT soaking Time on SS Overlay
>
>
>  Dear experts ,
>
> The production weld ( corrosion resistance overlay (SS)  3mm was deposited
> on the AISI 4130 Thk 50mm  by SMAW )  PWHT soaking time was exceeded the PQR
> soaking time more than 25% ,recommended by ASME Sec IX .
>
> QW-407.9 A separate procedure qualification is
> required for each of the following:
> (a) For weld corrosion-resistant overlay of A-No. 8 on
> all base materials, a change in postweld heat treatment
> condition in QW-407.1, or when the total time at postweld
> heat treatment encountered in fabrication exceeds 20 hr,
> an increase of 25% or more in total time at postweld heat
> treating temperature.
>
> Pl. advice on the above code case as the chemical composition on PQR meets A
> .no.8 of sec IX
>
>  Best  Regards
> Venu Moturu --
> 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/
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
> 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.
>
> --
> 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/
> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>
> 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.
>
>
>

--
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/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm

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.