Contrôles non destructifs
Veille normative décembre 2019

ISO/TS 16943, Tubes en matières thermoplastiques pour le transport des fluides – Contrôle des assemblages par emboîtures électrosoudables en polyéthylène au moyen de la technique pas ultrasons multi-éléments

Thermoplastic pipes for the conveyance of fluids – Inspection of polyethylene electrofusion socket joints using phased array ultrasonic testing

This document describes the phased array ultrasonic testing (PAUT) of polyethylene electrofusion (EF) socket joints used for the conveyance of fluids. It provides a test whereby the presence of imperfections such as voids, wire dislocation, misalignment, pipe under-penetration, particulate contamination, cold fusion and lack of fusion in electrofusion socket joints can be detected. The technique is only applicable to polyethylene electrofusion socket fittings without a barrier to ultrasonic waves. This document also provides requirements for procedure qualification and guidance for personnel qualifications, which are essential for the application of this test method. At the time of publication, experience only exists on the use of PAUT for polyethylene (PE80 and PE100) electrofusion socket joint sizes between 90 mm and 710 mm (SDR 11 and 17). Round robin testing has shown that PAUT is a viable method for enhancing the integrity assessment of electrofusion joints. This document does not apply to the detection of unscraped pipe. Such detection can be achieved by a simple visual inspection, provided mechanical scraping tools are employed.

Publié par ISO le 01/12/2019

ISO 21432, Essais non destructifs – Méthode normalisée de détermination des contraintes résiduelles par diffraction de neutrons

Remplace ISO/TS 21432 ( de juillet 2005) et ISO/TS 21432/AC1 ( de janvier 2008).

Non-destructive testing – Standard test method for determining residual stresses by neutron diffraction

This document describes the test method for determining residual stresses in polycrystalline materials by neutron diffraction. It is applicable to both homogeneous and inhomogeneous materials including those containing distinct phases. The principles of the neutron diffraction technique are outlined. Suggestions are provided on:

• the selection of appropriate diffracting lattice planes on which measurements should be made for different categories of materials;

• the specimen directions in which the measurements should be performed;

• the volume of material...