Installation for non-destructive testing, by immersion ultrasounds, of workpieces

An installation for an ultrasonic immersion testing of a tubular part including a cylindrical wall terminated by a transverse end flange projecting from the cylindrical wall via a connecting region having an inner radius on a flange side which is smaller than an outer radius opposed thereto, the installation comprising:

• emitter and receiver transducers in contact with a coupling liquid for emitting and for receiving ultrasounds, respectively, and configured to be arranged and aligned respectively on either side of the flange to be tested;
• a structure in a form of a U shaped or C shaped stirrup, wherein ends of opposing branches of the stirrup respectively bear the emitter transducer and the receiver transducer aligned with respect to each other along an axis perpendicular to the branches so as to present an internal space through which the flange to be tested can pass without touching the stirrup, and wherein a base is mounted in an articulated manner at an end of a moveable control arm;
• and
• an immersion container inside which is arranged the stirrup shaped structure bearing the emitter and receiver transducers and which includes a liquid for coupling the emitter and receiver transducers to one another, wherein the container is shaped to be arranged over the flange to be tested and includes first and second portions configured to engage and straddle, with sealing, the transverse flange and the cylindrical wall of the tubular part.