The inspection of a portion of an internal member of an assembled article, unavailable for direct line inspection, for example portions of the rotor of a gas turbine engine, is accomplished through the use of an ultrasonic probe inserted through an access port of the article toward a surface of the member to be inspected. As a result of predetermined positioning of a transducer in the operating head of the probe to bounce an ultrasonic signal from an internal boundary toward the portion to be inspected and the comparison between predetermined and received signals, along with an analysis of the comparison, determines whether a defect is present in the member.

Ultrasonic inspection method

A method is disclosed for inspecting a weld joining a first rotor disk made of nickel alloy and having an inner surface and an outer surface concentric with the rotor's longitudinal axis to a second rotor disk having an inner surface and an outer surface concentric with the rotor's longitudinal axis. The weld made of nickel alloy fills a radial gap between the rotor disks, and has a dissimilar microstructure to either of the rotor disks. The method includes forming at least one slot in the first rotor disk extending through either the inner surface or the outer surface of the first rotor disk terminating in the first rotor disk; and passing an inspection signal from the first slot to the weld to inspect the weld for defects.

Rotor disk weld inspection method and arrangement

A construction method of a pipeline that forms a pipeline by joining tubular members to each other by butt welding, includes: a tubular member preparation step for preparing a tubular member (10,11) having a smooth length of an outer surface (5) along an axial direction (O1) from a joined end (10a,11a), which is set based on conditions of ultrasonic inspection of a welded portion (M), which are determined by usage condition of the pipeline (R); a tubular member welding step for welding together prepared tubular member (10,11); and a welded portion inspection step for inspecting a welded portion (M) by ultrasonic inspection.

Construction method, tubular member, and nuclear power plant

METHODE PERMETTANT UN EXAMEN DE PIECES PEU ACCESSIBLES. ELLE CONSISTE A REALISER UNE FORME NORMALE PREDETERMINEE DE SIGNAL ULTRASONORE ASSOCIEE A LA PARTIE A EXAMINER DE L'ELEMENT 26; A DIRIGER UN PREMIER SIGNAL ULTRASONORE 60 A L'INTERIEUR DE L'ELEMENT 16A, VERS AU MOINS UNE FRONTIERE 62 DE L'ELEMENT DISTANTE DE LA PARTIE A EXAMINER DE L'ELEMENT, CE SIGNAL ETANT DIRIGE DANS L'ELEMENT, PAR RAPPORT A LA FRONTIERE ET A LA PARTIE A EXAMINER DE L'ELEMENT, SUIVANT UN CHEMIN TEL QUE CE PREMIER SIGNAL EST DEVIE PAR LA FRONTIERE VERS LA PARTIE A EXAMINER DE L'ELEMENT; A RECEVOIR, EN PROVENANCE DE CETTE PARTIE A EXAMINER DE L'ELEMENT, UN SECOND SIGNAL ULTRASONORE QUI EST UNE REFLEXION DU PREMIER SIGNAL; PUIS A COMPARER LA FORME DU SECOND SIGNAL AVEC LA FORME NORMALE PREDETERMINEE DE SIGNAL, POUR RECHERCHER LA PRESENCE D'UN DEFAUT DANS CETTE PARTIE EXAMINEE DE L'ELEMENT. APPLICATION AUX MOTEURS A TURBINE A GAZ.

Methode et appareil de controle par ultra-sons

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.

John K. Parkinson

Papers

Ultrasonic inspection recess in heat exchanger and nuclear steam generator tubesheets