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 Simply Informative... Davidson Measurement's UE Systems Update!

Tech Tips Newsletter UE SOUND BITES . . .

The Ultrasound Newsletter published by UE Systems,  and reproduced by Davidson Measurement
Information… Product News… Advice… Dialog
Volume 8, Issue 1 March, 2007

This newsletter is dedicated to you, the reader with the goal of improving your ultrasonic inspection skills and enhancing your value to your company or clients. As such, we welcome your participation. If you have questions or seek advice about your inspection techniques or programs, or if you wish to share your experiences with others, please e-mail your contributions to us at mandy@davidson.com.au

For your information, the following topics are covered:

  • What is the P-F Curve?

  • Ultraprobe Tip –Spectral Analysis for Valve Inspection

  • Comments & Contributions:
    –Ultrasound World III Proceedings
    –New Contest

  • Training Schedule
 

What is a P-F Curve?

Whether well maintained or not mechanical equipment will eventually fail. Of course, the more attention paid to predictive and preventive maintenance actions, the better the potential life expectancy. There is a life expectancy for all rotating equipment. As components all move or come in contact with something that moves, there are many conditions created in the natural motions of mechanical equipment that eventually lead to a point where it will fail. Our challenge is to be aware of any changes in operating equipment that can ultimately lead to a failure stage. Once entered, we than have the responsibility of making sure we can jump in early enough to keep the designated equipment from a catastrophic failure state causing an unplanned downtime situation.

The P-F curve is an illustration we have seen in technical journals and at Ultrasound World conferences that describes the “Potential for Failure of rotating equipment from early stages of failure to catastrophic failure. At Ultrasound World we were shown where along this “slope to failure” various predictive technologies lie. As it happens ultrasound technology was shown to be capable of detecting the earliest stages of failure in rotating equipment.

Some inspectors may not feel that it is important to catch a bearing fault at the earliest onset. To others it is a welcome feature in that the affected bearing can be identified as needing increased inspection intervals. Determination of further action strategies can be assessed by the creation of a trend chart. Some of these actions might call for additional monitoring with vibration, oil analysis or thermal imaging or to schedule a replacement at the most advantageous time.

To learn more about the P-F curve, review the Ultrasound World III proceedings available as a free download or as a CD. The presentations that cover the P-F curve are: Mike Howard: “Optimizing an Asset Lubrication Program Utilizing Common Sense and Ultrasound Technology”, Terry Harris: “You Can’t Get There from Here, The Climb Up The PF Curve”.
To get your complimentary copy of Ultrasound World proceedings, click here: http://www.uesystems.com/ultrasound_world_III_proceedings.asp

 

 Ultraprobe Tip- Spectral Analysis for Valve Inspection

One advantage of ultrasound inspection is that it can detect the presence of turbulent flow related to a leak condition. When a valve leaks, turbulence is generated downstream of the valve seat. By comparing upstream to downstream, differentials in ultrasound levels can help determine if a valve is leaking. Often the procedure involves four test points: 2 upstream (points A and B) and two downstream (points C and D). For the majority of cases simply comparing upstream to downstream dB levels is sufficient. There may be instances in which valve flow modulates or, as with reciprocating compressor valves, observing a timed event might provide more information than by just observing changes in dB levels. In other instances the ability to graphically portray the image of a leaking valve can help illustrate findings in a report.

Using spectral analysis can help. Record the sounds at the C test point and play them back in the time series. If a known good condition has been recorded the images of both can be used in your report. If you want to provide an image of the leaking valve, record all four test positions. When you play them back create overlays for each. Be sure to keep the sensitivity the same when recording the four test points or the sound recording comparison will not be accurate. The spectra view of the 4 is colourful and makes a great attachment in your reporting.

Carlos Garza provided us with some excellent graphical representations of leaking valve conditions at Ultrasound World. You’ll find them in his presentation entitled: “Ultrasound Fundamental Technology for the Efficient Use of Steam” http://www.uesystems.com/ultrasound_world_III_proceedings.asp

 

 Comments & Contributions

Ultrasound World III

Ultrasound World III was an outstanding success. The presentations provided us all with valuable information which we would like to share with you. As we mentioned above in this newsletter, you can get your copy three ways: order the CD, view on line or download from the UE Systems web site: http://www.uesystems.com/ultrasound_world_III_proceedings.asp

COMPLIMENTARY ULTRASOUND WORLD III PROCEEDINGS -GET YOUR COPY NOW
HERE'S YOUR OPPORTUNITY TO LEARN FROM OTHER USERS

Learn how Ultrasound is used for safety
Learn about integrating Thermography and Ultrasound
How to improve Condition Monitoring Programs
Success Stories: How Ultrasound helped find Bearing Problems and
improve Reliability Programs

 

Mark your calendar for the next great learning experience,

Ultrasound World IV

January 27-30, 2008!

UE Systems Contest!

Here’s a new contest. Every month UE Systems is going to set up a new sound for you on their web site. All you have to do is read the clue and identify it. All successful entries will be placed in a monthly drawing for a prize. This month’s prize is a UE Watch.

Send UE systems one of your sounds with a brief description. If they select it for use they’ll put your name up on the site to give you the recognition you deserve plus they’ll happily send you one of their famous UE shirts as a thank you.

To participate in the contest simply click here.
 

 Ultrasound Training Schedule 2007:

As you may know from previous newsletters, this year we are offering a more varied program. You can attend our renown Level I and Level II courses or take a specialized software course.

Please be sure to register as early as possible for your class. Don't be shut out.

DATES and CLASS LOCATION:

  

Level I and Level II

February 5 - 9 Level I Crystal River, FL
March 5 - 9 Level I San Diego, CA
April 16 - 20 Level I Charlotte, NC
May 7 -11 Level I Des Moines, IA
June 11 - 15 Level I Milwaukee, WI
July 16 - 20 Level I Seattle, WA
August 6 - 10 Level II Elmsford, NY
September 10 - 14 Level I Houston, TX
October 15 - 19 Level I Louisville, KY
November 12 - 16 Level I Birmingham, AL
December 3 - 7 Level I Honolulu, HI

To register: email: info@uesystems.com 
or register on-line: http://www.uesystems.com/forms.asp?frmID=10

1-Day Software Class Ultratrend DMS & UE Spectralyzer

February 21 Software I Day Pasadena, CA
March 14 Software I Day Houston, TX
April 24 Software I Day Greenville, SC
May 16 Software I Day Birmingham, AL
June 20 Software I Day Detroit MI
July 25 Software I Day Albany, NY
August 15 Software I Day Springfield, MA
September 19 Software I Day Philadelphia, PA
October 24 Software I Day St. Louis, MO

To register: email: info@uesystems.com 
or register on-line: http://www.uesystems.com/forms.asp?frmID=21

 

Thanks for taking the time to read this newsletter...see you next time!

Best Regards
Mandy Jansz

Customer Response Coordinator

Marketing Department

Biolab (Aust) Pty Ltd trading as

Davidson Measurement

email: mandy@davidson.com.au

 

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We look forward to assisting you with your measurement needs.

Best Regards

Mandy Jansz
Customer Response Coordinator
Marketing Department
Biolab (Aust) Pty Ltd trading as Davidson Measurement
 

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