DUAL GUIDE TUBE FOR INSPECTION OF HEAT EXCHANGERS

摘要

A method and apparatus for simultaneously inspecting the inner wall of two tubes, such as in a heat exchanger, including a base member which supports first and second guide tubes for guiding inspection probes of a testing system. The guide tubes are held by the base member a predetermined distance apart to align with a pair of tubes of the heat exchanger. The guide tubes may be fixed with respect to the base member by clamping collars and spacer bushings, or may be mounted for longitudinal movement with respect to the base member against the bias of a coil spring. A robotic tool delivery system is used to automatically move the dual guide tube assembly through a predetermined sequence to optimize testing positions where two testing probes may be used simultaneously.