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tasutasu
,
Japan, Joined Feb 2019, 3

tasutasu

,
Japan,
Joined Feb 2019
3
02:02 Feb-16-2019
ASME SEC.III NB NB-5243 Corner-Welded Nozzles
zoom image



Dear all,

I need to perform volmetric inspection(UT/RT) on corner-welded nozzle(full-pene).

Nozzle detail is below and attached file.

[NDE STANDARD]
ASME SEC.VIII DIV.1
ASME SEC.V

[Material]
Body: Super duplex stainless steel(SDSS)
Flange: SDSS
Weld metal: SDSS
[Flange 1]
Flange class: ASME 2500Lb-250A R.J
Weld leg size: Both 35mm×35mm
Material thickness:50mm

[Flange 2]
Flange class: ASME 2500Lb-250A R.J
Weld leg size: Both 28mm×28mm
Material thickness:32mm

But I heard colleague of NDE specialist that it is difficult to perform this weld as per below reason.
[RT]
it is no satisfy geometric unshrpness and IQI.
[UT]
In case of angle beam, position of defect is not clear due to sound velocity anisotropy of SDSS.

As you know, in case of ASME DIV. VIII, Corner-welded nozzle is no required to perform UT/RT.
But I found that Corner-welded is required to perform UT/RT in ASME DIV. III NB-5243.
So if someone have performed UT/RT on same corner-welded nozzle,
Please let me know how to method to perform UT/RT?

Thanks and best regards,

Tasutasu

 
 Reply 
 
Ali
Ali
09:57 Feb-16-2019
Re: ASME SEC.III NB NB-5243 Corner-Welded Nozzles
In Reply to tasutasu at 02:02 Feb-16-2019 (Opening).

Tasutasu,
Your colleagues is right about the UT difficulties of stainless steel welds.But first you have to prapare weld mockup with defects to verify UT for your subject .
There is some techniques will be helpful to achieve good results.
1.apply angle beam longitudinal probes to detect weld volume defects from outer surface of nozzles.
2-low frequency shear waves probes to to detect side wall fusion defects from outer surface of nozzles.
3- zero degree longitudinal probes to detect both weld volume and side wall defect from inside surface of the vessel.
You can also apply PAUT instead of MUT but the operator ( for both PAUT and MUT)should have enough experience for inspection of coarse grain welds by longitudinal angle beam probes.

 
 Reply 
 
Frederic Reverdy
Sales,
Eddyfi Technologies, France, Joined Aug 2016, 15

Frederic Reverdy

Sales,
Eddyfi Technologies,
France,
Joined Aug 2016
15
09:53 Feb-18-2019
Re: ASME SEC.III NB NB-5243 Corner-Welded Nozzles
In Reply to tasutasu at 02:02 Feb-16-2019 (Opening).

Dear Tasutasu,

We have developed an application for nozzle inspection using PAUT. You can find more information here
https://www.m2m-ndt.com/en/nozzle-inspection-gekko/

For stainless steel, I agree with Ali, a combination of longiudinal (for the bulk) and shear for the fusion face would be the best solution. Using the right wedge, a multigroup configuration for the PAUT could generate the longitudinal and shear mode at the same time avoiding to do two scans.

Let me know if you need more information

1
 
 Reply 
 
ASHOK KUMAR PATRA
,
Saudi K-KEM Engineering service co, Saudi Arabia, Joined May 2018, 63

ASHOK KUMAR PATRA

,
Saudi K-KEM Engineering service co,
Saudi Arabia,
Joined May 2018
63
10:58 Feb-18-2019
Re: ASME SEC.III NB NB-5243 Corner-Welded Nozzles
In Reply to Frederic Reverdy at 09:53 Feb-18-2019 .

Dear,

What if the nozzle is at an angle to x direction or oriented at two angles to both x and y direction is it possible to inspect with gecko.

 
 Reply 
 
tasutasu
,
Japan, Joined Feb 2019, 3

tasutasu

,
Japan,
Joined Feb 2019
3
15:08 Feb-20-2019
Re: ASME SEC.III NB NB-5243 Corner-Welded Nozzles
In Reply to ASHOK KUMAR PATRA at 10:58 Feb-18-2019 .

Thanks all for reply

I will confirm your comments and reply it on thread

Best regards

 
 Reply 
 
Frederic Reverdy
Frederic Reverdy
12:30 Mar-30-2020
Re: ASME SEC.III NB NB-5243 Corner-Welded Nozzles
In Reply to ASHOK KUMAR PATRA at 10:58 Feb-18-2019 .

ASHOK KUMAR PATRA, the Gekko can take disorientation of the nozzle along the axis of the main pipe at the moment

 
 Reply 
 

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