Re: [MW:20609] Combination of Two PQRs

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You certainly know that in ASME IX the base metal thickness and the deposited metal thickness are two different essential variables.
When you want to support a WPS by means of a PQR you have to satisfy all essential variables by means  of the qualification ranges.
The Code, with QW-200.4 (b) offers a flexibility regarding the base metal thickness but for the root passes only
So if you have a base metal thickness of let us say 50 mm, you may base you WPS, for the root passes only, on a PQR done with a test coupon of 13 mm, although the 13 mm qualify base metal thickness only up to 26 mm.
For the other passes you need however a PQR based on a specimen thickness of 25 mm minimum
I hope I helped....

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Vicky Patil ---16/04/2014 15:57:01---i ready minimum 13mm for each single process for combination of 2 PQR i am true ya wrong ??

From: Vicky Patil <patilvicky4@gmail.com>
To: materials-welding@googlegroups.com
Date: 16/04/2014 15:57
Subject: Re: [MW:20598] Combination of Two PQRs
Sent by: materials-welding@googlegroups.com

---

i ready minimum 13mm for each single process for combination of 2 PQR i am true ya wrong ??

please reply 


On Sat, Apr 5, 2014 at 6:40 AM, Raghuram Bathula <raghurambathula@gmail.com> wrote:

yes, u can


On 5 April 2014 13:42, Santosh Dantuluri <santosh-85@hotmail.com> wrote:

Dear Gents,

 

Client want to establish WPS by combining the below both PQRs of Section IX to get additional advantages.  Please review and tell, whether this is possible and if not why? if yes give details.

 

Vessel MDMT: -47.5

 

WPS # 38 is made by combining two PQRs:

 

PQR 1: SMAW :::::: 5.98 mm thk coupon

Material: SA 516 Gr 60 to SA 516 Gr 70.

Thickness range: 2.99 to 11.96 mm 

Test temp: -59 deg C.

 

PQR 2: SMAW ::::::: 10 mm thk coupon

Material: SA 516 Gr 60 to SA 516 Gr 70.

Thickness range: 10 to 20 mm.

Test temp: -51 deg C.

 

Thanks in advance

Regards

Santosh





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