can UT use for 100% RT LS joints

Inthu · **Posted:** Thu May 29, 2008 3:03 pm

Dear All

I have small confusion . During the manufacturing of pressure vessel 100 % RT is required. If one of the long seam of Nozzle neck is missed RT and already fabricated. And laterly RT is not possible to take in condition of nozzle to Shell/Dish head welded condition. Then can we use 100% UT in place of 100% RT.

is this acceptable in U stamp jobs?

Thanks in advance :roll:

.

akonrad · **Posted:** Thu May 29, 2008 3:39 pm

Is the nozzle neck made of plate or pipe?

kusumagopi · **Joined:** Mon May 26, 2008 8:51 am **Posts:** 4

PLEASE REFER TO CODE CASE 2235.

Dr. Koelbl · **Posted:** Fri May 30, 2008 1:27 pm

Just to be sure:
Are you asking about RT of the joint nozzle-shell?
if so, Please indicate which Figure of UW-16 represents your configuration.

If not, I suggest that you read UW-11(a). Can you use the exemption by size?

If not, CC2235 may help, but has got some nasty conditions.

I advise you talk to your Inspector how to use it.

DK

Inthu · **Posted:** Sat May 31, 2008 7:16 am

Hello Sirs

Thanks to all of you.
Mr. akonrad it is clear the nozzle neck is made from Plate . Im discusing about RT of long seam of that fabricated nozzle.

Nozzle neck is prepared from plate.

Dr. Koelbl sir today i will go through on your suggestion .

Thanks again.. :-)

akonrad · **Posted:** Mon Jun 02, 2008 10:28 am

Interesting thoughts arise when it comes to the purpose of the radiography. If it's just because of the wall thickness of the nozzle (increased E in UG-27 formula), then it's clear that it has to be radiographed somehow or treated in accordance of CC2235. I don't know how the vessel is made, but I presume that there is some possibility to insert the film inside the nozzle and make an exposition with the source outside.
But if it's specified as radiographed because of the reinforcement of opening in shell, and the area of the radiographed nozzle is the factor- then it's kinf of an issue. Because you can make a shot of the weld from its attachment to shell to its attachment to flange, but not below or beyond these. And it's the point below the attachment to shell that makes the reinforcement business take any benefit of the radiography.

can UT use for 100% RT LS joints

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