Dear Venkat,
You have to refer the construction code for the preheat and interpas temaparature of each material grade.
If you find there is no requirement of preheating then you can convince your client easily as given below.
- Tell him that you qualified PQR at ambient temarature and interpass temaprature is only supplymentry variable ( i.e requalification required only if there is toughness requirement).
If there is preheating requirement higher than ambient temp as per construction code ,then it is difficult to convince your client.
Sandeep.M.V
On Mon, Jan 16, 2012 at 5:30 PM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:
if u have not done preheat in ur PQR, revise ur wps to mention minimum
preheat temp. As far as interpass temp, since it is not call for
impact test, u need not mentioned interpass temp in WPS. Since ur
using SS filler it is always better to mentioned interpass max to
avoid mettallurgucal changes in weld metal
thanks
pandithan
On 1/12/12, venkateswaran k <kvnkat@rediffmail.com> wrote:
> Dear All,
>
> We qualified WPS for Material SA 516(P:1,G:1) TO SA240TP 316L(P:8,G:1) by
> SMAW process as per ASME Sec IX ,thickness range- base metal Grove is: 5 -30
> mm,Filler metal:E309 Mol.
>
> My question is while qualifying we did not mentioned Preheating and Inter
> pass temperature (in WPS -QW 406),now one of our client asking for these two
> parameters need to be filled /required, in this case how to convince him.
> Whether can I make amendment for this WPS, it is acceptable as per ASME Sec
> IX. If yes can u provide format for this amendment.
>
> kvr
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