Detection of the thickness of scale on the inner surface of water pipes by infrared thermography

The infrared thermography technique developed in the present study was successfully applied to determine the scale thicknesses of the steel pipe. We aim to estimate the thickness of the scale on the inner surfaces by calculation of the maximum temperature of the infected pipe heated surface. Dimensions of the pipe and those of the layer of scale are taken as geometrical parameter. We have studied the effect of each one on the thermal response of the considered structure. These information are important for determining dangerous state of water distribution network.