hi, friends.. I want to learn about oil leakage detection systems..

Oil leaks from where? What oil, seal oil, lub oil, crude oil leaks from pipeline,? TQ

yes josh you are right..ı am talking about hydraulic system oils...internal or external leaages at the system...for instance at cylinders..etc..is there any device to detect these kinds of leakages?..thank you all

If I were you, I won't be interested to detect leaks. I would want to prevent it from happening. I would look into the seal design and their hydraulic system's operational methods & maintenance strategies which may cause the leakages to happen. Even a good design would fail if not operated and maintained properly. I think doing FMEA or RCA would be helpful. Tracking MTTF and MTTR should be done. TQ

To prevent leakage in hydraulic systems, cleanliness is a must. Contamination is the biggest enemy for hydraulic systems. I would use special magnetic drain plugs to detect any metal debris in the oil. Check your oil regularly ( a prefer a six month base) for dirt, moister, oxidation and debris. When opening valves, pumps, motorss etc, check for abnormal wear. Broken parts will leave scratches and burs. Using your finger can be a good (but painfull ) indicator. A boroscope is an excellent inspection tool.

thanks for your valuable replays. but ı have some questions;
1- what is FMEA or RCA?
2-what is tracking MTTF and MTTR?
3-can you give detailed information about special magnetic drain plug.

thanks..have a good work

Come on, pls read posts about improving reliability to have the big picture eg:

]http://maintenanceforums.com/eve/forums/a/tpc/f/209103451/m/9281024651[B]
[URL=Use of FMEA for plant reliability purposes]Use of FMEA for plant reliability purposes[/URL]

It's ok not to know a lot now but it's under your own control. Keep digging, u might strike gold, or at least bronze.

P/s how tick are your glasses that you have to write in capital letters below? Just joking mate!

TQ

This message has been edited. Last edited by: Josh,

DEAR JOSH, I HAVE JUST JOINED TO THIS FORUM AND ALSO I HAVE JUST GRADUATED FROM ENGINEERING FACULTY..SO I THINK IT IS VERY NORMAL NOT HEAR ANYTHING ABOUT THAT SYTEMS...I AM WAITING FOR YOUR HELP AND ADVICES...THANKS

Quaresma , please do not SHOUT !!
Writing in capitals we call shouting.

A magnetic drain plug, is drain plug that is magnetized. When changing the hydraulic oil, any metal debris is an indication of broken parts cirulationg in the system causing more damage.

sorry svanels, ı don't know the story of capitals. thanks for your explanation..

Quaresma,

Out of general curosity, I searched on "oil leakage detection" and found a lot of methods for leak detection.

External leaks can be visually detected by naked eye or with a color marker such as Fluorescent Dye added to oil. The are also spray-on liquids to enhance view of leaks.

I have used an ultrasound meter (SDT 150) with contact sensor to detect internal hydraulic leaks by "listening" to the flow noise from a leaking valve. Very low flow rates (seeping or weeping) may not be detectible by this method.

There are electrical sensors to measure level, conductivity, flow rate, opacity, position (cylinder movement), and light reflection that may be used for detecting leaks.

I think that you will need to present a specific problem for this Forum to be able to help you. Good luck in your search.

Walt

Here is a post about leak detection:

[URL=Leak detection using Ultrasonic detector

On Reliabilityweb, many good write up abt leak detection.

TQ

This message has been edited. Last edited by: Josh,

I have been involved with testing for hydraulic leaks/bypass and a few things to remember.

I have been using ultrasonics to determine the condition of the systems. This technique can identify small - large leaks very easily as Walt has alredy mentioned. When using this you must know how the system works ie: the schematics should be obtained and areas for possible problems identified. Be aware of pressures in the system as a change in pressure can change the results. Also when doing cylinders remember the position of the cylinder can change the results.
Also Themo works pretty good on cylinders although minor bypassing is not able to be detected using this technique unless it is causing major heat.

Good luck with it I hope this helps. Send me an email if you wish and we can discuss more.
craig.staub@ccipope.com.au