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 -
625 views
Technical Discussions
Murray Cook
Murray Cook
09:09 Mar-22-2001
Boiler near drum cracking

I am looking for a remote ultrasonic aplication that will detect generator bank tube cicumferential cracking in or slightly above the roll joint at the mud drum. The mud drum will be flooded only access is from the steam drum through the tube ID(aprox.20 feet)to the area of interest. Typical tube ID is 2 inch or less and wall thickness of about 0.180". Near drum external corosion is not an issue so shear wave application is necessary. Is there equipment available for this inspection?

Murray Cook
AITEC Inc.
Thunder Bay ON.
Canada


 
 Reply 
 
Guido Crapels
Guido Crapels
00:24 Mar-23-2001
Re: Boiler near drum cracking

: I am looking for a remote ultrasonic aplication that will detect generator bank tube cicumferential cracking in or slightly above the roll joint at the mud drum. The mud drum will be flooded only access is from the steam drum through the tube ID(aprox.20 feet)to the area of interest. Typical tube ID is 2 inch or less and wall thickness of about 0.180". Near drum external corosion is not an issue so shear wave application is necessary. Is there equipment available for this inspection?
.
: Murray Cook
: AITEC Inc.
: Thunder Bay ON.
: Canada
.
Reply:

Yes, there is equipment available for these kind of examinations. Please take a look at our site:
http://www.nuson.nl
We provide the means for ultrasonics examinations in tubes, conventionally 3/4", 7/8" and 11/16", but larger diameters are also feasible and have demonstrated to perform well. The UT probes can be customized to the task, so as to register axial or circumferential flaws. The probe will be guided by a flexible hose, driven by a push-puller. The acquisition is PC-software controlled and evaluated.
Once inside the steam drum the probe can be guided towards the mud drum, while the odometer on the push-puller registers the exact displacement. All kinds of scans (A-, B-, C- and customized scans) can be rendered from the acquired data to evaluate the potentially present cracklike flaws.
The practical implications however may constitute a problem: what is the accessibility to the tubes from the steam drum ? The probe has to be inserted manually, as no dedicated manipulators (as in the nuclear power plants) are likely to be available. To what extent can deposits onto the tube ID surface be anticipated ?



 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
01:36 Mar-23-2001
Re: Boiler near drum cracking
Try contacting Physical Acoustics at Princeton New Jersey. They have a system we have used called Tubescan. This is a UT C-Scan Imaging System for applications such as yours and it has a shear wave capability for identifying cracking. I do not know if it is on their website www.pacndt.com



 
 Reply 
 

Product Spotlight

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.
>

Aerospace Systems - Automated Ultrasonic Inspection

USL are specialists in the design and manufacture of turnkey ultrasonic inspection systems for aer
...
ospace applications. From monolithic composites to complex honeycomb structures. This video shows just a few examples of what is possible, find out more at: www.ultrasonic-sciences.co.uk
>

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

Research Center IDEKO develops an ultrasonic train wheel inspection system for CAF

The Basque Research centre IK4-IDEKO has developed a state-of-the-art ultrasonic inspection system f
...
or the train wheel. This system secures a sound condition of train wheels and is thus a significant contribution to rail transport safety. The device was delivered to CAF recently and its use allows the manufacturer to become an approved supplier of rolling stock in Italy, as it meets the demanding homologation standards of this country. \\\\r\\\\n
>

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