Leak detection of systems

Transcription

1 Leak detection of systems detection and remove Serviceportfolio resom ltd. Hydraulic checking in production plant's Examination with special measuring technique incl. documentation and rental of the measuring technique with school enrolment for self measurement Pulsation damper for food industries Engineering, production and sale of pulsation damper Leak detection in production plant's Service, measuring and documentation Rental and school enrolment for self measurement Sale

2 Generally requirements to the food industry International requirements of chains force to introduce their producers for higher accreditation standards such as IFS (international Food standard). Are manufacturers in a the position to produce a safe product over the total production chain in biological, chemical and physical regard. Basis of a control system must be a systematically and comprehensively HACCP plan (Hazard Analysis Critical control POINT), on the bases of the hygiene guideline 93/94 of food hygiene. Article from publications Can booster pumps avoid you before product contaminations: After detailed tests, it's certain, that it can come in spite of a positive pressure gradient to a product mixture. Debt is the osmotic pressure which is the driving force on pin holes or micro cracks. In other words, by the turbulent flow there is always an exchange of material despite positive pressure gradient on the range of the leakage in both directions. Raimund Kalinowski (Brauindustrie 08/2007)

3 Applications in the beverage industry Leak detection and leak testing from plate and pipe heat exchangers Charging valve and ring tank inspection of bottling plants Leak detection of welding pipe's 1. Trouble presentation Corrosion Pulsation Pressure shocks on thin stainless steel plates produce leakages

4 2. Inspection method for plate heat exchanger a. Proving Leakage already exist (defect without breakout is not visible) Leakage check with pressure test (air or water) Leakage check with contuctometry testing Leakage check with infiltration UV.-tracer b. Preventive Leakage not exist (defect before breakout is visible) Leakage check with gas method - Helium -Hydrogen 2a. Providing inspection method Leakage check with pressure test The primary side is filled under pressure with air or water. The secondary side is pressure free. On a plate defect, there's a pressure reduction on primary side.

5 2a. Providing inspection method Leakage check with conuctometry test The primary side is filled e.g. with sodium sulfate water. The secondary side with water. Driven by the osmotic differential pressure the tracer substance diffuses on the water side. 2a. Providing inspection method Leakage check with infiltration UV - tracer The surface of the plates must be chemically cleaned. Then a fluorescent color is up-sprayed. After a response time each plate is checked with UV light in a darkened area.

6 2b. Preventive inspection method air hydrogen helium molecular weight 29 g/mol 2 g/mol 4 g/mol density 1,2 g/l 0,09 g/l 0,18 g/l viscosity 18, Pa s 8, Pa s 19, Pa s background concentration 100 % 0,5 ppm 5 ppm lightest molecule very low viscosity low background concentration (0.5 ppm) ecologically friendly cheapest check gas (cost's approx. ¼ of helium) non toxic non corrosiv food and beverage accredited (E 949) He H H 2b. Preventive inspection method advance identification of material fatigue concentration H2. / time 0,8 mm plate ok 1 corrosion starts plate still ok plate replace 2 3 H2

7 2c. Summary of inspection method's method expenditure of time especificity* pressure test -12 hours + conductometry test -12 hours ++ infiltration UV-tracer test - min. 40 hours +++ helium test - 4 hours ++ hydrogen test 1 hour +++ *, + bad, ++ good, +++ very good H He H 3. The hydrogen method What's the hydrogen method: The hydrogen method based on a tracer gas mix with 5% hydrogen and 95% nitrogen), which is ideal for leak testing and leak location. Hydrogen safety: Hydrogen is no flammable dilutes enough with nitrogen. The international standard ISO classifies the recommended tracer gas mix as non - flammable.

8 3. Range of application PHARMAINDUSTRIE AUTOMOBILINDUSTRIE AIRCRAFTINDUSTRIE MEDICAL TECHNOLOGIE TELECOMMUNICATION CHEMICAL INDUSTRIE - to check bioreactors - to check motor top heat - to check fuel and break pipes - to check artificial heart and blood pumps - to check underground cables - to check transmission pipelines 3. Function of hydrogen sensor The sensor is made of an hydrogen absorbing alloy (metal hydride). Instead of an electrical input to the amplifier there is a thin film of metal hydride, which is permeable to hydrogen atoms only. The absorbs hydrogen atoms give rise to a small voltage which is amplifier and transferred to the detector. Only hydrogen atoms can diffuse in the metal. There are no cross axis senilities with medium which not contain hydrogen.

9 3. Hydrogen leak detector HLD 400 simple and robust for industry use no vacuum pumping no maintenance no need to draw sample into the detector mobile use easy to calibrate - gas - test leakage instrument hand probe with hydrogen sensor 3. Schematic presentation of the hydrogen method secondary side gas filled sensor measuring area 90% N2 10% H2 hydrogen molecular transfer circulation pump

10 3. Leak detection on plate heat exchanger 3. Results of the H 2 measurement 5 samples in 40min. H2 concentration (ppm) increase less than 10ppm per min. and per measurement => plates ok. 5 samples in 40min. H2 concentration (ppm) increase to approx. 10ppm per min. and per measurement => plate corrosion starts 5 samples in 40min. H2 concentration (ppm) increase more than 10ppm per min. and per measurement => hair leakages, plate cracks

11 3. Sealing check on plate heat exchanger Example involving of a plate heat exchanger

12 More applications of HLD 400 Manuel leak detection on pipe heat exchangers bottle washing machines pasteurize ice water / brine cooler measuring cell gas More applications of HLD 400 Leakage detection on bottling plant bellow checking

13 Industrial applications Manual leakage detection Automatic leakage detection (cyclic) (daily) 5 % hydrogen gives you 100 % quality you increase the product quality For more info's and documents please contact office@resom.com