The Heat input calculation by "volume of weld metal" has been removed. Ie
QW-409.1(b) is not applicable for QW-409.29
BR
M.Vijayan
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of N VENKATESWARA
PRASAD
Sent: Tuesday, January 10, 2012 10:29 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:13440] RE: 13437] ASME Sec. IX changes 2011a - Query on
Heat input calculation for weld overlay
Hi Vijayan,
Thanks for your reply.
What is changes in QW 409.29. I could not find any difference between
previous and present edition. Can you please eloborate on it.
Regards
VENKAT
On 1/9/12, vijayan <vijayan.m@madinagulf.com> wrote:
> Hi Venkat
>
>
>
> Per Sec IX, QW409.26, for first layer only, an increase of more than
> 10% of Heat input or volume of weld metal qualified requires
Requalification.
>
>
>
> This restriction is only applied to first layer due to the reason
> that, an increase in heat input or volume of WM on first layer, may
> increase the tendency to have more dilution with the base metal.
>
>
>
> In your case, first pass (first Layer-E309LMo) is 0.815 Kj/mm. this
> can be increased to 0.815*1.1=0.896Kj/mm.
>
>
>
> Other passes, there is no restriction on heat input.
>
>
>
> The first layer
>
> QW409.26 refers back to QW409.1 to calculate the heat input or volume
> of weld metal. there you will get more info about wave form controlled
welding.
>
>
>
> [cid:image001.png@01CCCEE9.EEC0DB20]
>
>
>
> BR
>
> M.Vijayan
>
>
>
>
>
> -----Original Message-----
> From:
> materials-welding@googlegroups.com<mailto:materials-welding@googlegrou
> ps.com> [mailto:materials-welding@googlegroups.com] On Behalf Of N
> VENKATESWARA PRASAD
> Sent: Monday, January 09, 2012 2:36 PM
> To: materials-welding
> Subject: [MW:13437] ASME Sec. IX changes 2011a - Query on Heat input
> calculation for weld overlay
>
>
>
> Dear All,
>
>
>
> As per Sec IX 2011 a , there were some changes in Heat input
> calculation regarding overlay. Can any body explain me with expample.
>
>
>
> We have one corrosion overlay qualified on CS material with E309LMO
> and E 316L.
>
>
>
> The heat input for first pass is 0.815 KJ/mm
>
> , second pass 0.7 KJ /mm
>
> final pass 0.715 KJ/mm
>
>
>
> What changes to done in in the WPS as per ASME Sex. 2011a.
>
>
>
>
>
> Regards
>
>
>
> Venkat
>
>
>
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