ULTRASONIC INSPECTION RECESS IN HEAT EXCHANGER AND NUCLEAR STEAM GENERATOR TUBESHEETS

摘要

A vessel with a butted weld seam is provided with an access slot in its surface at a selected distance from the weld seam. An ultrasonic probe engages with a wall of the slot which is aligned with the weld and signals generated by the probe cross the axis of the weld frontally without substantial reflection from adjacent vessel surfaces.