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 -
243 views
Technical Discussions
STUART WEBBER
STUART WEBBER
00:23 Aug-08-2000
UT TESTING AUSTENITIC GEN. END RINGS

My name is Stuart Webber and have been testing austenitic gen. end rings for almost 20yrs. Being employed by the then electricity generating board I have tested every end ring, a number of times, on every generator set owned by the electricity board in Queensland Australia. I have plenty of tales to tell but simply state " if you are new to the game, and have not considerable ultrasonic experience, you are heading for a fall in trying to test these troublesome items. I have seen many end rings removed to verify restults or as a result of underlying conductor or insulation repairs. I have rejected a few and have a collection in my laboratory with some great defects, and still scratch my head at times when testing these things. There is a lot of paranoia about crack growth rates and micro defects allowed but on a practical level you should see the size of some of the defects that have survived service conditions, and I know that I wil cop some flak over this statement but it is fact. I gave away the manual methods of testing these items as I have prooved over the years they fall down especially where the underlying structures impinge on the inner surface of the ring which produces a strong return signal anyway. I have been using the AEA time of flight equipment for the last 4 years and am very pleased with the results. Again I know I will cop flak for this statement as there is great controvesy over the correct method to use on these items but my business is at the sharp end, not the laboratory and I have seen and done enogh to prove to myself which is the way to go ie conventional or TOFD. Be assured of one thing, if you attempting to test these items with no specific training on them you are heading for a fall.


 
 Reply 
 

Product Spotlight

UCI Hardness Tester NOVOTEST T-U2

UCI hardness tester NOVOTEST T-U2 is is used for non-destructive hardness testing of: metals and
...
alloys by scales of hardness: Rockwell (HRC), Brinell (HB), Vickers (HV); non-ferrous metals, alloys of iron etc., and using five additional scales for calibration; with tensile strength (Rm) scale determines the tensile strength of carbon steel pearlitic products by automatic recalculation from Brinell (HB) hardness scale.
>

NEW - TD Focus-ScanRX

The NEW Next Generation Advanced UT platform, TD Focus ScanRX - Also available as a card stack solut
...
ion. Key Improvements 1. Data acquisition is significantly faster than current design 2. Better aesthetic – closely aligns with HandyScan RX 3. Improved IP rating (Target IP66) 4. Ruggedized housing 5. Connectors are protected from impact and ingress 6. Integrated stand and separate retractable handle easy to keep clean) 7. Touchscreen with ruggedized display glass 8. 3-Axis encoder input
>

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.
>

YXLON Cougar EVO

Scalable small footprint X-ray inspection systems for assembly and laboratory applications. The
...
YXLON Cougar EVO series was designed to provide the "best-in- class" inspection solutions for SMT, semiconductor, and laboratory assembly applications, while maintaining a small system footprint for maximum convenience. With optimized software and hardware, these systems produce higher quality and more consistent results than other electronics inspection systems currently on the market.
>

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