Re: [MW:27496] Impact Test for Procedure Qualification

Hi,

You need to qualify 1st and 3rd pqr as suggested by Rameshji. But you can avoid 2nd pqr by using asme interpretations and still qualify the entire range of 3-50mm.

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On Mon, Mar 12, 2018 at 10:05 AM, Ramesh

<rameshkannandevaraj@gmail.com> wrote:

Hi Jibin & All

This is my first Entry to this Group... if any mistakes correct me.. Thanks

As a first step, refer Table QW-451.1 in ASME Sec IX for PQR thickness limits. 

Based on some Essential / supplementary variables this Minimum or Maximum thickness will vary from this table.

For example, refer QW-256 -GTAW welding variable table. u can see QW403.6 , QW 407.4  i.e T limits row and study relevant QW clause which is self explanatory

Your case

Q1) What will be the thickness range qualified is it 10.97 to 16.97 or 5 mm to 16.97 or 5 mm to 21.94.

Since your PQR have impact requirement i.e supplementary variable requirements , Your PQR thickness range qualified is 10.97 to 21.94

Q2) If i need to qualify a WPS with Thk ranges 5 mm to 25mm which thickness need to be selected .

Qualify one PQR (1) with 6 mm thick, this will qualify 3 to 12 mm thk-

 this pqr needs to be qualified

Qualify other PQR (2) with 12 mm thick , this will qualify 12 to 24 mm thk - 

this pqr can be avoided by using asme interpretations

Qualify other PQR (3) with 25 mm thick, thick will qualify 16 to 50 mm thk- 

this needs to be qualified

So you will have WPS combining all PQRs with 3 to 50 mm which almost covers all your Fabrication requirement for CS pipes.

Hope this helps you...

Thanks and Regards,

Rameshkannan Devaraj

On Sun, Mar 11, 2018 at 5:58 PM, Babur Khan <mbabur.bwp@gmail.com> wrote:

Dear sir,

As per ASME Sec ix QW-403.6 

Min. T (10.97) mac 2T.

Regards,

M. Babur Khan Lashari

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On 11 Mar 2018, at 12:58 PM, Raghuram Bathula <raghurambathula@gmail.com> wrote:

On Sun, 11 Mar 2018 at 13:46, Jibin Philip <jibinphilip123@gmail.com> wrote:

Dear All , 

Spec - ASME B31.3 (Ed : 2016)  & Sec IX (Ed : 2017) ,

For PQR-A106 GR B -  i have taken 6" pipe Thk - 10.97mm - with impact test

Q1) What will be the thickness range qualified is it 10.97 to 16.97 or 5 mm to 16.97 or 5 mm to 21.94.

 

10.97 to 16.97 

Q2) If i need to qualify a WPS with Thk ranges 5 mm to 25mm which thickness need to be selected .

you need to have multiple test coupons 

Regards , 

Jibin 

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