[MW:805] UT as NDT for Welded Joints

It is designer's choice (what is end use, is it for skirt base or any part of the item which is subjected to stress due to pressure?); AD has a choice of choosing between D or US for butt welds under stress (LN)

In ASME Design “E” is selected based on RT; other wise it is quite normal to use UT for skirt base flange made of segments from plate, otherwise I have not come across any body flange made from plate in segment, instead of forging.

 

However TOFD can be and is used as a substitution of RT.  It is superior in that it can fully characterize and size defects that are found.  It is permitted as a substitute for RT in the ASME Boiler and Pressure Vessel Code via Code Case 2235.However, the use of TOFD requires substantial skill and experience.

Note: RT is superior for what it does.  TOFD is a new toy to play!

 

 

-----Original Message-----
From: PED2000@googlegroups.com [mailto:PED2000@googlegroups.com] On Behalf Of Singh Rishi Raj (Tasnee Site)
Sent: Tuesday, May 27, 2008 6:54 PM
To: PED2000@googlegroups.com
Subject: [PED:87] Re: UT as NDT for Welded Joints

 

 

Intresting !!!

Please let us know more details.

 

In AD , NDT requirements are based on metal.

Specific details will help us .

 

Best Regards,

 

Rishi Raj Singh

 

-----Original Message-----

From: PED2000@googlegroups.com [mailto:PED2000@googlegroups.com] On

Behalf Of Rajesh

Sent: 27 May 2008 16:09

To: Process Equipment Design

Subject: [PED:86] UT as NDT for Welded Joints

 

 

Dear All,

 

May I know if what is the preffered practice of NDT for Welded joints,

particularly when flanges are made in segments & then welded.

 

As I understand ASME does not allow UT

But AD- Merckblatt recommeds UT.

 

Please comment.

 

Regards

 

 

Rajesh Bhavsar

 

 

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