Validation of protocols for corrosion and deposit evaluation in pipes by radiography (by S. Ekinci et al.)

The objective was to propose and to validate standard protocols for corrosion and deposit evaluation in pipes by film based tangential radiography. Film density measurement technique had to be used as an alternative or complementary method. The CRP covered straight pipes and bends/elbows made of carbon steel corroded/eroded on the outer or/and inner surface with or without insulation, some of them with deposit inside the pipe. This kind of a research work was co-ordinated as a Round Robin Test (RRT) programme. For the RRT, Turkey prepared three test samples of diameter 60 mm and wall thickness 4 mm, one straight pipe including artificial flaws and deposit, one elbow with artificial wall thinning and one straight pipe including natural corrosion pits. The examination procedures for the RRT samples were prepared by taking the General Standard ISO 5579 into consideration, and the examinations carried out accordingly. Aside from the RRT programme, Turkey prepared a draft standard on the subject for submission to ISO as a standard proposal. (author)