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NDEs

NDEs

(OP)
Anybody tells me the NDE meaning?

RT1

RT2

RT3

Thanks.

RE: NDEs

The RT probably stands for Radiographic Testing (RT). Not sure about the suffix numbers but I would guess that the 1,2 and 3 could possibly stand for a level I examiner, 2 would be a Level II examiner and 3 would be a level III examiner.  Where did you see these specific designations?

RE: NDEs

(OP)
Yes, RT is Radiographic Testing: 1 is Level I, 2 level II and 3 level III.

Some customers specify those levels.

I guess:

RT1: 100% testing;
RT2: spot UW-11(b) type 1 on long. seams, spot UW-11(a)(5)b type 1 on circum.
RT3: all seams spot UW-11(b) type 1.

Please advise.

RE: NDEs

Ok. In ASME Section VIII, Div 1 Table UW-12 contains 8 weld joint types for RT. This could be what you are referring too;

RT Type 1; double welded butt joint
   Type 2; single welded butt joint with a backing strip
   Type 3; single welded butt joint with no backing strip
   Type 4; double fillet welded lap joint
   Type 5; single full fillet welded lap joint w/plug weld
   Type 6; "      "                       "   wo/plug weld
   Type 7; corner joints, full, partial or fillet weld
   Type 8; angle joints

Please refer to this table for a complete description.

RE: NDEs

Ding123-

Your second post is right. Take a look at VIII-1 UG-116(e) for the formal definitions of RT 1, RT 2, RT 3, and RT 4.

jt

RE: NDEs

Ding123

ASME VIII Div 1 UG-116 (e) gives you all you need to know about RT 1, 2, 3, 4.

It will also refer you back to UW-11, UW-51 for more info.
In a nut shell RT 1 is "full" RT since "100% RT" does not really exist.
RT 2 tru 4 are various spot RT cases. You need to read those.

What meteng refers to are joint categories and these are related to the extent of RT and joint configuration to give you joint efficiencies.

I hope it helps.

RE: NDEs

RT1 = full RT of main vessel butt welds

RT2 = full RT of Category A seams, plus UW11a5b of B seams

RT3 = spot RT of main vessel butt welds

RT = RT performed does not meet requirements of RT1, RT2 or RT3.

Steve Braune
Tank Industry Consultants
www.tankindustry.com

RE: NDEs

Sorry...
"RT = RT performed does not meet requirements of RT1, RT2 or RT3" should read...

RT4 = RT performed does not meet requirements of RT1, RT2 or RT3

Steve Braune
Tank Industry Consultants
www.tankindustry.com

RE: NDEs

(OP)
Thanks to all for your input with kindness.

Ding123

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