DP test Requirement in Overlay PQR.

[PAMULA]

Dear All,

I have conducted Overlay PQR qulification (316L OVERLAY ON SA516 Gr.70N) as per ASME Sec IX.

As per ASME SEC IX QW-453, note 4, 5, 9, we have conducted

1. DP test after every layer(total 3layers) in as-welded condition.
2. 4-Side bend tests in PWHT condition.
3. Chemical analysis from overlay specimen in as-welded condition.

Job requirement:
316L weld overlay on SA516 Gr.70, vessel will under PWHT at 620 Deg.C.
ASME Div.1 Cladded Vessel.

Client Comments on PQR.

client is demanding us to provide DP report After PWHT of the overlay.

Client says PWHT is essential variable, DP test & bend tests should be conducted after PWHT.

Query.

Is it Code (Sec.IX or Div.1 ) requirement to conduct DP test after PWHT ?.

If it is code requirement, pl. provide the reference from code.

if any code interpretations available, pl. provide the same.

regards

P.Rao.

[sandeep p]

Dear Rao,
No doubts about the client requirement,b'coz always NDT can done after
PWHT.


Thanks,


Sandeep.k.p

[manpreet]

Dear Mr. Rao

As per ASME sec viii div 1,No 42 , VIII-1-98-09,NDT can be performed
before PWHT as well.

in my opinion, Doing a DP test is not a big deal,if client asking for
it,you should fulfill his requirements.

Regards
Manpreet Singh
Welding Engineer
Spiecapag
On Sun, 30 May 2010 12:34:57 +0530 wrote

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[Ramachandran M S]

Irrespective of  yr PQR, code req etc Penetrant testing (PT) has a meaning and purpose if it is done after SR and final machining.

This does not preclude testing at different stages of manufacture (i.e)
interstage ,PT after complete welding and machining prior to HT.

Regds

MSR

[KOLA Ramalingeswara Rao]

Dear Rao,

Client is correct, if job is requires PWHT, NDT shall be perforemd after PWHT.

 

Regards,

 

K.Ramalingeshwara Rao.

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[Prasanna2981 Umapathy]

Dear Sir,

 

The following activity mentioned as DP test after PWHT as per the client requirement.

 

1.The client requirement to be fulfilled as mentioned.

2.DP test after PWHT has every chance of showing some defects due to the process of stress relieving which may not be shown before PWHT.

 

Regards,

 

Prasanna.R.U.

Bureau Veritas-Chennai

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