where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

4268 views
Technical Discussions
Mehmet BAL
Consultant
Turkey, Joined Nov 2003, 7

Mehmet BAL

Consultant
Turkey,
Joined Nov 2003
7
04:17 Feb-19-2004
RT Interpretation of ASME VIII Div.1

Hi Everybody,
Can any one help to interpret the acceptance criteria of ASME Section VIII Div.1 (UW-51) given below:
For full examination, any group of aligned indications that have an aggregate length greater than “t” in a length of 12 “t”, except when the distance between the successive imperfections exceed 6L where “L” is the length of the longest imperfection in the group.
Question:
1. From the above criteria what will be the distance between two close indications, or is there any maximum or minimum distance restriction?
2. How do you interpret when the distance between indications exceed 6L?
3. How do you interpret when the distance between indications less than 6L?
Your help will be appreciated.
Thanks
Mehmet BAL



 
 Reply 
 
Ed T.
Ed T.
00:24 Feb-20-2004
Re: RT Interpretation of ASME VIII Div.1
----------- Start Original Message -----------
: Hi Everybody,
: Can any one help to interpret the acceptance criteria of ASME Section VIII Div.1 (UW-51) given below:
: For full examination, any group of aligned indications that have an aggregate length greater than “t” in a length of 12 “t”, except when the distance between the successive imperfections exceed 6L where “L” is the length of the longest imperfection in the group.
: Question:
: 1. From the above criteria what will be the distance between two close indications, or is there any maximum or minimum distance restriction?
: 2. How do you interpret when the distance between indications exceed 6L?
: 3. How do you interpret when the distance between indications less than 6L?
: Your help will be appreciated.
: Thanks
: Mehmet BAL
------------ End Original Message ------------

You would consider a group of aligned indications as, just that, a group. If this group length is greater than “t” or the wall thickness in any 12t it is rejectable.
For example, if the wall thickness is 2” and you have a group of aligned indications that are 2.5” long and is contained within 24", it is rejectable. (2” x 12=24”)
Now if these indications are separated by more than 6L it would not be considered as part of the same group and evaluated seperately. 6L indicates 6 times the length of the longest indication.
For example if you have a group of aligned indications 2mm each. One indication is 3mm. 6x3=18. If successive indications are separated by more than 18mm then they are not part of the same group. This would also be cause to evaluate seperately.
It can be confusing, but I hope this helps.





 
 Reply 
 
N.Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N.Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
00:59 Feb-21-2004
Re: RT Interpretation of ASME VIII Div.1
Interpretation of UW-51
ASME Section VIII Div.1 UW-51Paragraphg(b)(3)is appliacble to agroup of aligned indications.

1. In any group of indications if the aggregate length is less than “t” over the length of 12t, it is acceptable (irrespective of distance between successive indications) provided none of the indications in the group exceed the limitations given in UW-51 Paragraph (b)(2).

2. When the aggregate length exceeds “t” over the lenght of 12t & the distance between successive indications more than 6L of the largest indication it is acceptable. They may be evaluated as two individual groups over next 12t length from each group.

3. It is rejectable if the distance between successive indications less than 6L of the largest indication and the aggregate length exceed “t” over 12t weld length.

N.Kuppusamy
----------- Start Original Message -----------
: Hi Everybody,
: Can any one help to interpret the acceptance criteria of ASME Section VIII Div.1 (UW-51) given below:
: For full examination, any group of aligned indications that have an aggregate length greater than “t” in a length of 12 “t”, except when the distance between the successive imperfections exceed 6L where “L” is the length of the longest imperfection in the group.
: Question:
: 1. From the above criteria what will be the distance between two close indications, or is there any maximum or minimum distance restriction?
: 2. How do you interpret when the distance between indications exceed 6L?
: 3. How do you interpret when the distance between indications less than 6L?
: Your help will be appreciated.
: Thanks
: Mehmet BAL
------------ End Original Message ------------




 
 Reply 
 
Mehmet BAL
Consultant
Turkey, Joined Nov 2003, 7

Mehmet BAL

Consultant
Turkey,
Joined Nov 2003
7
04:22 Feb-21-2004
Re: RT Interpretation of ASME VIII Div.1
Thank you very much for your clear explanation.
Mehmet BAL
----------- Start Original Message -----------
: Interpretation of UW-51
: ASME Section VIII Div.1 UW-51Paragraphg(b)(3)is appliacble to agroup of aligned indications.
: 1. In any group of indications if the aggregate length is less than “t” over the length of 12t, it is acceptable (irrespective of distance between successive indications) provided none of the indications in the group exceed the limitations given in UW-51 Paragraph (b)(2).
: 2. When the aggregate length exceeds “t” over the lenght of 12t & the distance between successive indications more than 6L of the largest indication it is acceptable. They may be evaluated as two individual groups over next 12t length from each group.
: 3. It is rejectable if the distance between successive indications less than 6L of the largest indication and the aggregate length exceed “t” over 12t weld length.
: N.Kuppusamy
: : Hi Everybody,
: : Can any one help to interpret the acceptance criteria of ASME Section VIII Div.1 (UW-51) given below:
: : For full examination, any group of aligned indications that have an aggregate length greater than “t” in a length of 12 “t”, except when the distance between the successive imperfections exceed 6L where “L” is the length of the longest imperfection in the group.
: : Question:
: : 1. From the above criteria what will be the distance between two close indications, or is there any maximum or minimum distance restriction?
: : 2. How do you interpret when the distance between indications exceed 6L?
: : 3. How do you interpret when the distance between indications less than 6L?
: : Your help will be appreciated.
: : Thanks
: : Mehmet BAL
------------ End Original Message ------------




 
 Reply 
 


04:23 Jul-27-2005

You may find it interesting to take a look at the sites in the field of...




 
 Reply 
 
Imtiyaz Ahmad
Imtiyaz Ahmad
20:27 Jul-09-2014
Re: RT Interpretation of ASME VIII Div.1
In Reply to Mehmet BAL at 04:17 Feb-19-2004 (Opening).

Suppost the Thickness of the Weld is 10 mm and We have to see in the Film of 12t means 120 mm... and It is Written the Aligned Indication Greater than T means Indication Legth is more than 10 mm, Suppose 13 mm (Supposte 4 Indication are there 4mm, 5mm, 6 mm,) but the Differnce Between the Indication Shall be Checked According to the Largest Indication ... 6T means the gap bwetween the Indication shall be of 6t atleast or greater otherwise its a repari

 
 Reply 
 
LanhHuyet
NDT Inspector,
Vietnam, Joined Jun 2013, 25

LanhHuyet

NDT Inspector,
Vietnam,
Joined Jun 2013
25
05:08 Feb-09-2015
Re: RT Interpretation of ASME VIII Div.1
In Reply to N.Kuppusamy at 00:59 Feb-21-2004 .

Please explain me : What is aggregate length ? Is the sum of the length of indications or the length from starting point of first indication and the end point of second indication.For example first indication has the length 3mm,the second has the length 2 mm? the distance between them are 2mm.What is the aggregate length in this case ? 3+2 =5 or 3+2+2 = 7 ?


 
 Reply 
 
Lanh Huyet
NDT Inspector,
Vietnam, Joined Jun 2013, 25

Lanh Huyet

NDT Inspector,
Vietnam,
Joined Jun 2013
25
10:23 Feb-10-2015
Re: RT Interpretation of ASME VIII Div.1
In Reply to LanhHuyet at 05:08 Feb-09-2015 .

Hope to have the help from all of you for this problem.

 
 Reply 
 

Product Spotlight

OPBOX with standard software is able to do all types of inspections and measurements: flaw detection in welds and materials, scanning of objects, testing composite materials, forged and moulded pieces, many UT inspections, measurements of properties of ma

Typical applications: UT measurements with pulse technique, Measurement of thicknesses also at hig
...
h temperatures, Measurements of properties of materials, including fluids and gases We are delivering a standard version of the software (for any Microsoft Windows up to 10 x64 with Microsoft Hardware certification report Approved) and for special needs: SDK with ready to use examples for LabView, MATLAB x64, C++ wrapper for dll, Python and Linux., and also low-level description of how to control our devices directly from any USB tools
>

Robotic laser shearography enables 100% inspection of complex, flight-critical composite structures

An article in “Composites World Magazine” showcases Non Destructive Testing of aero-structures
...
with Laser Shearography. Over the years Dantec Dynamics has supplied many solutions for the aerospace industry. Referring to specific customer projects several of these cases are examined to outline the advantages of using Laser Shearography for automated defect detection.
>

HD-CR 35 NDT Computed Radiography System

Portable high-resolution CR scanner for all radiography applications - weld testing, profile images
...
and aerospace. No matter what type of radiographic testing you are performing, the unique TreFoc Technology of the HD-CR 35 NDT imaging plate scanner always guarantees the highest image quality.
>

Sci Aps Z-Series Portable Handheld Analysers

The world’s only handheld analyzer that measures carbon content in stainless (yes even L-grades),s
...
teels, and cast irons. Also accepted for low Si analysis for sulfidic corrosion analysis, and is widely used in the power industry for Cr analysis, for flow accelerated corrosion applications.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window