NF EN ISO 10863
Non-destructive testing of welds - Ultrasonic testing - Use of time-of-flight diffraction technique (TOFD)
ISO 10863:2011 specifies the application of the time-of-flight diffraction (TOFD) technique to the semi- or fully automated ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm. It applies to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld and parent material are low-alloyed carbon steel. Where specified and appropriate, TOFD can also be used on other types of materials that exhibit low ultrasonic attenuation (especially that due to scatter). Where material-dependent ultrasonic parameters are specified in ISO 10863:2011, they are based on steels having a sound velocity of (5 920 ± 50) m/s for longitudinal waves, and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when examining materials with a different velocity. ISO 10863:2011 makes reference to the basic standard EN 583‑6 and provides guidance on the specific capabilities and limitations of TOFD for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. TOFD can be used as a stand-alone method or in combination with other NDT methods or techniques, for manufacturing inspection, and for in-service inspection. ISO 10863:2011 specifies four testing levels (A, B, C, D) in accordance with ISO 17635 and corresponding to an increasing level of inspection reliability. Guidance on the selection of testing levels is provided. ISO 10863:2011 permits assessment of TOFD indications for acceptance purposes. This assessment is based on the evaluation of transmitted, reflected and diffracted ultrasonic signals within a generated TOFD image. ISO 10863:2011 does not include acceptance levels for discontinuities.
ISO 10863:2011 specifies the application of the time-of-flight diffraction (TOFD) technique to the semi- or fully automated ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm. It applies to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld and parent material are low-alloyed carbon steel. Where specified and appropriate, TOFD can also be used on other types of materials that exhibit low ultrasonic attenuation (especially that due to scatter).
Where material-dependent ultrasonic parameters are specified in ISO 10863:2011, they are based on steels having a sound velocity of (5 920 ± 50) m/s for longitudinal waves, and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when examining materials with a different velocity.
ISO 10863:2011 makes reference to the basic standard EN 583‑6 and provides guidance on the specific capabilities and limitations of TOFD for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. TOFD can be used as a stand-alone method or in combination with other NDT methods or techniques, for manufacturing inspection, and for in-service inspection.
ISO 10863:2011 specifies four testing levels (A, B, C, D) in accordance with ISO 17635 and corresponding to an increasing level of inspection reliability. Guidance on the selection of testing levels is provided.
ISO 10863:2011 permits assessment of TOFD indications for acceptance purposes. This assessment is based on the evaluation of transmitted, reflected and diffracted ultrasonic signals within a generated TOFD image.
ISO 10863:2011 does not include acceptance levels for discontinuities.
Le présent document spécifie l'application de la technique de diffraction des temps de vol (méthode TOFD) pour le contrôle par ultrasons semi-automatique ou entièrement automatique des assemblages soudés par fusion de matériaux métalliques d'épaisseur égale ou supérieure à 6 mm. Cette technique est essentiellement destinée à être utilisée sur des joints soudés à pleine pénétration de géométrie simple sur plaques, tubes et récipients dans lesquels le métal de base et le métal fondu sont tous les deux constitués d'acier au carbone faiblement allié.
<p>This document specifies the application of the time-of-flight diffraction (TOFD) technique to the semi- or fully automated ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm.</p> <p>It applies to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld and the parent material are low-alloyed carbon steel. Where specified and appropriate, TOFD can also be used on other types of materials that exhibit low ultrasonic attenuation (especially that due to scatter).</p> <p>Where material-dependent ultrasonic parameters are specified in this document, they are based on steels having a sound velocity of (5 920 ± 50) m/s for longitudinal waves and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when testing materials with a different velocity.</p> <p>This document makes reference to ISO 16828 and provides guidance on the specific capabilities and limitations of TOFD for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. TOFD can be used as a stand-alone method or in combination with other non-destructive testing (NDT) methods or techniques, for manufacturing inspection, and for in-service inspection.</p> <p>This document specifies four testing levels (A, B, C, D) in accordance with ISO 17635 and corresponding to an increasing level of testing reliability. Guidance on the selection of testing levels is provided.</p> <p>This document permits assessment of TOFD indications for acceptance purposes. This assessment is based on the evaluation of transmitted, reflected and diffracted ultrasonic signals within a generated TOFD image.</p> <p>This document does not include acceptance levels for discontinuities.</p>
- Avant-proposiv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions2
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4 Remarques générales sur les possibilités de la technique3
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5 Niveaux d'examen3
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6 Informations exigées avant contrôle4
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6.1 Points à définir par la spécification4
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6.2 Informations spécifiques exigées par l'opérateur avant contrôle5
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6.3 Procédure ou instruction de contrôle écrite5
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7 Exigences relatives au personnel et à l'appareillage5
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7.1 Qualification du personnel5
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7.2 Appareillage6
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8 Préparation avant contrôle6
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8.1 Volume à contrôler6
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8.2 Disposition des traducteurs6
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8.3 Réglage du pas de balayage7
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8.4 Considérations d'ordre géométrique8
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8.5 Préparation des surfaces balayées8
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8.6 Température8
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8.7 Couplant8
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8.8 Points de référence8
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9 Contrôle du matériau de base8
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10 Réglages de l'échelle de la base de temps et de la sensibilité9
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10.1 Réglages9
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10.2 Vérification des réglages9
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10.3 Blocs de référence10
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11 Contrôle des soudures11
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12 Interprétation et analyse des images TOFD11
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12.1 Généralités11
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12.2 Évaluation de la qualité de l'image TOFD12
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12.3 Identification des indications TOFD pertinentes12
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12.4 Classification des indications TOFD pertinentes12
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12.5 Détermination de la position et de la taille14
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12.6 Évaluation par rapport aux critères d'acceptation14
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13 Rapport de contrôle14
- Annexe A (informative) Blocs de référence16
- Annexe B (informative) Exemples de balayages types21
- Bibliographie31
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