Reg: combination of 2pqr's make a wps

[Chandra]

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

[Lalu Rajendran]

Hi,

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

regards,

LALU

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[Gopi Krishna Banerjee]

Dear Sir.

  It is QW – 200.2 (f).

Thanks.

G. K.  Banerjee.

 

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[Chandra]

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 <lal...@gmail.com> wrote:

Hi,

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

<image.png>

regards,

LALU

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[wilfred kojo]

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

<chandrasekh...@gmail.com> wrote:

[George Dilintas]

you can not exceed the base metal thickness qualified with the PQRB

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

[Lu, Feng]

If the code governing the job is B31.3, then the qualified range shall be T/2 ~ (T+1/4”).  In this specific case, PQR A qualified 4mm ~ 14mm and PQR B qualified 11mm ~ 28mm, so your range shall be 4mm ~ 28 mm.

 

 

Feng Lu, Ph.D. Metallurgy and Welding Engineer

Zachry Industrial, Inc. 527 Logwood San Antonio, TX 78221 l...@zachrygroup.com Office: 210.588.7818 Cell: 512 797 5777 Fax: 210.588.5037 www.ZachryGroup.com

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[dili...@gmail.com]

The latest edition of 31.3 has no specific requirements besides those of ASME IX

Sent from my BlackBerry 10 smartphone.

From: Lu, Feng Sent: Πέμπτη, 24 Μαρτίου 2016 - 18:08 To: Meghanadh K Reply To: material...@googlegroups.com Subject: RE: [MW:24572] Reg: combination of 2pqr's make a wps

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