Abstract: A mounting for locating in side-by-side relationship two ultrasonic wheel probes 10 used for ultrasonically inspecting a pipeline, the mounting including a mounting member 12 defining a slide 16, and two slider members 14 located in back-to-back relationship in the slide 16 and retained therein by a backing member 38. Each slider member 14 is adapted to locate one of the wheel probes 10.

Abstract: Disclosed is a wheel probe for use on a pipe inspection vehicle. The wheel probe comprises a annular perspex outer rim with a polyurethane tire mounted on a hub assembly which, with the hub, defines a fluid-tight chamber containing an acoustic coupling fluid. A number of ultrasonic transducers are located inside the chamber and are positioned close to the inside circumferential surface of the rim. The hub assembly is carried by a spring loaded carriage which is secured through which ultrasound will pass.The wheel probe includes a guide wheel on each side. The guide wheels are carried by the carriage but are moveable bodily relative to the center of the hub assembly, and when deflected, they operate on the assembly to move the wheel probe to ensure that the outer rim of the wheel is correctly aligned relative to the pipe.The wheel probe has a number of shields spaced around its periphery.