UT of nozzle weld

[fazel1]

I want to do the ultrasonic examination in a nozzle which is welded to a shell . the bevel is 45 degree on the nozzle and there is no beveling on the shell. the nozzle thickness is 14mm with outside diameter of 168mm and the shell thickness is 21mm. from which side of the nozzle do we have to perform UT . inside or outside? I belive that with angle probe from both sides we can't detect the lack of fusion in the shell wall. so which technic can we choose. how shall we calibrate the system?

 

[metengr]

fazel1;
From the nature of your questions, my advice is to contact a Nondestructive Testing (NDT) company that can provide you with a competent ASNT Level II or Level III Ultrasonic testing (UT) technician to perform this activity. They should be able to visit your shop and answer your questions.

 

[polleke]

Hi Fazel.
from what I read in your question is that the nozzle stands on the shell. If the nozzle length is about 100 mm or more than you can perform UT with angle probes. You can use 45 degree, 60 degree an 70 degree to be sure.(Be sure you have a level 2 oprator perform the job.) You can calibrate by using calibration pieces according to the ASME 8 code.
Have the examination done according to the same ASME 8 code.
I'm sure that you'll find every welding faillure that can be made.
Furthermore, have the outside tested magneticly aswel.

succes

Polleke

 

[polleke]

Hi again Fazel1`
I looked at your question with the nozzle welded in the shell. This is also possible to be tested ultrasonicly.
It can be done from the shellside, inside and outside, aswel from the nozzleside.
Be sure to heve a professional level 2 or 3 man perform the testing. Use the same calibration: ASME 8 code.
The only thing is that I donot think that anyone would make a construction like this.
Succes again

Polleke