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Abstract

The theme of the paper is the detection of through-valve leakage by vibration analysis. Experiments have been performed which demonstrate that a valve leaking internally excites the downstream pipework at particular frequencies in the range below 20 kHz. Several frequencies are excited. However, of note is that certain frequencies appear to depend only on the internal diameter of the pipe and the properties of the gas leaking through the valve. The results of extensive experiments are presented and an empirical relationship is suggested to predict the frequencies excited by the leakage. Thus, there is potential for the use of this method in a valve condition monitoring system to augment the range of methods presently available, none of which find widespread application.

Keywords

valves leakage vibration analysis safety hazard

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References

Henderson

The UK Valve Market, 1985 (British Valve Manufacturers Association).

Billington

M. J.

Harrison

Vivian

B. E.

The identification and evaluation of valve problems. Valves and actuators for fluid control. International Conference on

Developments in Valves and Actuators for Fluid Control, September 1985 (BHRA and BVMA, Oxford).

Dau

G. J.

A review of on-line leak detection methods for reactor systems. Third Conference on

Periodic Inspection of Pressurized Components, London, 1976, pp. 67–73 (Institution of Mechanical Engineers, London).

Dickey

Dimmick

Moore

P. M.

Acoustic measurement of valve leak rates. Mater. Evaluation January 1978, 36, 67–77.

Kupcis

O. A.

Non-destructive inspection of pressure tubes at the Pickering nuclear generating station. Third Conference on

Periodic Inspection of Pressurized Components, London, 1976, pp. 19–25 (Institution of Mechanical Engineers, London).

Hartman

W. F.

McElroy

J. W.

Acoustic emission surveillance of boiling water reactor piping nozzles and valves. In Acoustic Emission Monitoring of Pressurized Systems, ASTM STP 697, 1979, pp. 205–218 (American Society for Testing and Materials, Philadelphia, Pennsylvania).

Parry

D. L.

Robinson

D. L.

Elk River acoustic emission tests. Idaho Nuclear Corporation report IN-1371, Idaho Falls, May 1970.

Shack

W. J.

Ellingson

W. A.

Youngdahl

C. A.

Development of a non-invasive acoustic leak detection system for large high pressure gas valves. ISA Trans., 1980, 19 (4), 65–71.

Blackmar

G. E.

Find leaks faster with ultrasonic leak detectors. Hydrocarbon Processing, 1973, 52 (1), 73–74.

10.

Murphy

R. V.

Ultrasonic leak detection. Atomic Energy of Canada Limited report AECL-5316, Chalk River Nuclear Laboratories, Ontario, January 1977.

11.

Flournoy

N. E.

Schroeder

W. W.

Development of a pipeline leak detector. J. Can. Petrol. Technol. 1978, 17 (3), 33–36.

12.

Thompson

Wijesundera

L. S.

Leak rate measurement and leak detection through standard design process valves by vibration monitoring. In Second Cairo MDP Conference, Cairo University, 1982, pp. 289–296.

13.

Webborn

T. J. C.

Thermography—making heat loss visible. Chartered Mech. Engr, 1984, 31 (11), 45–47.

14.

Toles

G. E.

Leak detection by mass spectrometry. Can. Machinery and Metal Working, 1975, 86 (2), 56.

15.

Morse

P. M.

Ingard

K. U.

Theoretical Acoustics. 1968 (McGraw-Hill).

An experimental investigation into the detection of internal leakage of gases through valves by vibration analysis

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