Re: [MW:24559] Reg: combination of 2pqr's make a wps

Though asme ix permit combination of two pqs to make one wps, yet that does not mean that 2 pqr could be indiscriminately be combined. You can combine 2 pqr if there is overlap in essential and supplementary essential variables of the 2 pqr. For example the requires reduction of 55ºC as essential variable and increase of more than 55ºC in preheat as supplementary essential variable. 

If your case you pqr A preheat = 50ºC , then range qualified = 5- 105 and 

Pqr B preheat  = 170 , then range allowed = 115 - 225.

Since there is overlap between the two examples,  then both can not be combined. 

Note,  the figures stated above are just examples not real figures. 

Wilfred Kojo ( AWS CWEng )

Sent from Yahoo Mail on Android

On Sun, 20 Mar, 2016 at 7:35 am, Chandra

<chandrasekhar.palapala@gmail.com> wrote:

My thinking is QW-200.3(f) when impact test not require.

Must refer to QW-200.4(b) but reading that para, still confuses.

Could anyone suggest more???

Best Regards,

Chandra

On 19-Mar-2016, at 7:00 PM, Lalu Rajendran <lalucpt@gmail.com> wrote:

Hi,

please refer the below extract QW-200.3 (f), and hope this will suffice.

<image.png>

regards,

LALU

On Sat, Mar 19, 2016 at 3:29 PM, Chandra <chandrasekhar.palapala@gmail.com> wrote:

Dear to all,

I would like to ask you about the combination of pqr's

I have PQR A - 8mm (gtaw+smaw)
PQR B - 21.5mm (gtaw+smaw)
Both the pqr's were impact tested

now i want to make a wps using the 2pqr's as the thickness range 8mm to 43mm with impact requirements.

I require suggestions on this. Please give comments n valuable answers

Chandra
Welding Engineer


Best Regards,
Chandra

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