A METHOD AND AN APPARATUS FOR DETECTION OF AN INTERNAL LEAKAGE BETWEEN AT LEAST TWO FLUIDS FLOWING AND/OR CIRCULATING IN A PROCESS PLANT

摘要

The invention relates to a method and an apparatus for detection of an internal leakage between at least two fluids flowing and/or circulating in a process plant, wherein changes of a visual appearance of at least one of the flowing and/or circulating fluids are identified, wherein successive images of the at least one fluid comprising a number of pixels are obtained using digital image generating means for generating respective signals for each pixel; each of said successive images being processed via digital processing technique to calculate a respective value for the visual appearance of the fluid; a change of the visual appearance of the fluid being identified if the calculated respective values for the visual appearance are not constant, which change may be an indication of an internal leakage between the at least two fluids.