An automatic system for the nondestructive quality control of seamless pipes in mass line production

The structural scheme of an automatic system for nondestructive testing of seamless pipes in the technological line of their production is considered. The integrated use of ultrasonic and eddycurrent inspection methods reduced the number of missed flaws and overrejected pipes to a minimum. The refined calculation of the scanning step and turn angle of roll-table wheels is presented. The minimum reliably detectable area of the discrepancy between the wall thickness of a pipe and specified tolerances is calculated. The obtained calculation formulas make it possible to optimize the scanning step and increase the efficiency of inspection by 15.0%.