CORROSION AND DEPOSIT MEASUREMENTS IN PIPES BY RADIOGRAPHIC TECHNIQUES

Cold and hot water pipelines are vulnerable to internal and external c orrosion and subjected to deposit accumulation because of chemical eff ects. Determining the extent and the progress rate of these provides u seful information about their operational life and safety. This paper describes the evaluation of corrosion, remaining wall thickness and de posits in pipes taken from water networks and heat plants, using tange ntial radiography and density measurement techniques. Accuracy and lim itations of both techniques were investigated on various pipe samples with different diameters and wall thicknesses, in order to obtain opti mum source-to-film distances, film densities and,call thickness/diamet er ratios.