Apparatus for the non-destructive control of pipes by ultrasonic means

Abstract

Abstract The device is particularly applicable to the inspection of heat exchanger pipes. It comprises a head which can be inserted into the pipe and which is equipped with means (36 - 40) for centring it in the pipe. Means are provided for translating the head along an axis and rotating it about the axis, these means consisting of ultrasonic transducers coupled by immersion with the wall of the pipe (10). These transducers are capable of emitting a beam of ultrasonic volume waves and of detecting echoes. The transducers consist of at least one first ultrasonic transducer providing a focused beam with a direction lying in a meridian plane of the pipe and making an angle with the normal to the wall, and at least one second ultrasonic transducer (24a, 24b) providing a focused beam with a direction parallel to a diameter of the pipe and at such a distance from this diameter that the beam is oblique to the wall of the pipe. <IMAGE>

Inventors

• 👤 Jean-Pierre Vallée

Bibliographic Details