METHOD FOR MONITORING FLUID-TIGHTNESS AND DETECTING LEAKS IN A PIPE WITH A VALVE

Methods for technical diagnostics and inspection of pipelines to detect leaks in nuclear power plants pipelines. Acoustic signals are recorded within a broad ultrasonic range at two points along the pipeline length located on the pipeline downstream and upstream of a valve. The recorded ultrasonic s...

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Hauptverfasser:	ABIDOVA, Elena Aleksandrovna, SINELSHCHIKOV, Pavel Vladimirovich
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MEASURING MECHANICAL ENGINEERING PHYSICS PIPE-LINE SYSTEMS PIPE-LINES STORING OF DISTRIBUTING GASES OR LIQUIDS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	Methods for technical diagnostics and inspection of pipelines to detect leaks in nuclear power plants pipelines. Acoustic signals are recorded within a broad ultrasonic range at two points along the pipeline length located on the pipeline downstream and upstream of a valve. The recorded ultrasonic signals are then processed and used to construct two signal spectra. Then the range of 15,000 to 90,000 Hz is isolated, and the highest amplitude value in both signal spectra is selected within this range. Then the amplitudes of the signal spectra within the said frequency range are divided by the highest amplitude value, and the difference between the signal spectra upstream and downstream of the valve is determined using a mathematical formula, thereby determining the degree of the pipeline leak-tightness.