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 -

VOGT Ultrasonics GmbH
non-destructive testing, services, training, ultrasonic systems, immersion and squirter inspection systems, PROline, digital radiology

404 views
Technical Discussions
Miguel Suarez Arana
Engineering
Servipetrol, Bolivia, Joined Sep 2002, 1

Miguel Suarez Arana

Engineering
Servipetrol,
Bolivia,
Joined Sep 2002
1
00:27 Sep-25-2002
ASME B&PV Secc V Art. 2 and 22

There is a possible misunderstanding in the interpretation for the appropriate IQI selection when using double wall-double image technique which states in the Art. 2 that the IQI selection has to be done based in the single wall and a sketch showing this is contained in the 95 Ed. and in the 98 Ed. Add. 2000, while in the former this was cleared in the Art. 22 (e 747) stating to be careful when exposing DW/DI there has to be selected the IQI bases in the double wall, the latter edition does not states this, probably for the respect to the original ASTM standard (the title also was changed here).
Our concern is that , being well versed in the RT technology, we consider that omitting a clear up confusess some inspectors not familiar with the RT in this special case.
We would appreciate very much if you agree with us in using the IQI based in the double wall thickness only for the DW/DI technique


    
 
 
Juan Amado
Engineering, Inspection
Arco Industrial, S.A., Panama, Joined Nov 2001, 44

Juan Amado

Engineering, Inspection
Arco Industrial, S.A.,
Panama,
Joined Nov 2001
44
00:10 Sep-27-2002
Re: ASME B&PV Secc V Art. 2 and 22
We have performed many RT inspections utilizing the DW/DI technique, and have always managed to comply with the IQI wire diameter apropiate for the single wall thickness. Furthermore, it makes sense that the IQI selection be based on the single wall thickness because since the weld being evaluated is equivalent to only one wall of the pipe, the indications to be detected must be in the range of only one wall thickness. The difficulty with the method stems from the fact that there is added distance between the side of the pipe that is far from the film thus making it more difficult to show the appropiate wire image on the radiograph. The only way to mitigate this effect is to increase the source to object distance. For tubes of 2" to 3" nominal diameter we have found a 24" to 30" source to object distance yields good results.

: There is a possible misunderstanding in the interpretation for the appropriate IQI selection when using double wall-double image technique which states in the Art. 2 that the IQI selection has to be done based in the single wall and a sketch showing this is contained in the 95 Ed. and in the 98 Ed. Add. 2000, while in the former this was cleared in the Art. 22 (e 747) stating to be careful when exposing DW/DI there has to be selected the IQI bases in the double wall, the latter edition does not states this, probably for the respect to the original ASTM standard (the title also was changed here).
: Our concern is that , being well versed in the RT technology, we consider that omitting a clear up confusess some inspectors not familiar with the RT in this special case.
: We would appreciate very much if you agree with us in using the IQI based in the double wall thickness only for the DW/DI technique
.



    
 
 

Product Spotlight

ISONIC 3510

Very Powerful Superior Performance Extremely Portable Smart Phased Array Ultrasonic Flaw Detector an
...
d Recorder with 2 Conventional UT and TOFD Channels uniquely combines PA, single- and multi-channel conventional UT, and TOFD modalities providing 100% raw data recording and imaging. Suitable for all kinds of every-day ultrasonic inspections
>

NozzleScan: Radial nozzle scanner with probe skew

NozzleScan is a versatile manual scanning solution developed for the inspection of nozzle welds in
...
both set-through and set-on configurations. Available in both two-axis and three-axis instrument configurations and adaptable to cover a wide range of 90-degree nozzle sizes, from 3" upwards, on ferritic and austenitic materials.The transducer skew axis can also be adjusted, encoded and locked.
>

Lyft™: Pulsed Eddy Current Reinvented

PEC Reinvented—CUI Programs Redefined Corrosion under insulation (CUI) is possibly the greatest u
...
nresolved asset integrity problem in the industry. Current methods for measuring wall thickness with liftoff, without removing insulation, all have severe limitations. Eddyfi introduces Lyft — a reinvented, high-performance pulsed eddy current (PEC) solution. The patent- pending system features a state-of-the-art portable instrument, real- time C-scan imaging, fast data acquisition with grid-mapping and dynamic scanning modes, and flexibility with long cables. It can also scan through thick metal and insulation, as well as aluminum, stainless steel, and galvanized steel weather jackets. Who else but Eddyfi to reinvent an eddy current technique and redefine CUI programs. Got Lyft?
>

TVC awarded UKAS accreditation

TVC are delighted to finally announce we have been awarded UKAS accreditation for our calibration
...
laboratory. Laboratory accreditation to ISO/IEC 17025:2005 enables us to conduct the Electrical Verification of Ultrasonic Flaw Detection Equipment to BS EN 12668-1:2010. It has taken many months of hard work and we want to thank our staff for all their efforts during this massive undertaking.
>

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
s