Tuesday, September 4, 2012

Re: [MW:15219] Impact Test clarification


Dear Arun,
 
What you stated below is correct. But here the case is different.Here they  would re do the PQR coupon  just to know the impact value on a lower temperature and to see  if it satisfies the client requirement. 
One thing  they have to make sure  is , all the ranges or  values of the previously qualified parameters remain same .
If there is no changes , no need of re qualification. Anf if it changes , they have to re do the whole test. 
 

Regards,
Habeeb Rahman

SNC
Abudhabi.
 
From: S DAS Arun RSHT-2 <Arun.SDAS2@techint.it>
To: materials-welding@googlegroups.com
Sent: Tuesday, 4 September 2012, 8:31:35
Subject: RE: [MW:15215] Impact Test clarification

Dear Sudhakar,
 
Apologies if my understanding is wrong, Sec 9 says that variation in supplementary essential variables require requalification of WPS ref:200.1.C.
 
Hope you will update.
 
Thanks and regards,
 
Arun S Das
 
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sudhakar kuppuswamy
Sent: Monday, September 03, 2012 11:49 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:15197] Impact Test clarification
 
 
Dear Mubeen,
 
No need to REDO the entire test.
 
You can weld a test coupon by using the existing WPS and only Impact test shall be carried out at -46 deg C.
 
 
Heat input shall be controlled during test coupon welding and H.I values shall not exceeds the previous qualified PQR value and ensure other essential shall be as per previous qualified PQR.
 
As per ASME SEC 09 clauses /tables from QW 252 through QW 266, increase in heat input is a supplementary essential variable. This refers to QW 409.1.
 
please refer to the above mentioned  clause in  ASME SEC 09.
 
 
Regards,
Sudhakar.K
 
 
 
 
On Mon, Sep 3, 2012 at 6:33 AM, mubeen mubeen <mubeenaws@gmail.com> wrote:
Dear experts, 

Please help out to clear my doubt. 

I have qualified a WPS/PQR with impact -29 deg C, now customer want the WPS/PQR shall be qualified with impact in -46 deg C. Also there is no remaining coupon piece available for impact testing with -46 deg C. 

My question here is, should I weld a coupon and only do impact test as required by customer and attached to PQR will be sort out this issue.? 
or 
Should I REDO a PQR with all mechanical  test which includes Tensile, Hardness, Bend along with impact will sort our this issue.? 
 
 
Requesting you to please provide me ASME IX clause reference.
 

Anticipating for you kind help. 

Thanks & Regards. 
M.K.Mubeen
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