Contrôles non destructifs
Veille normative février 2021

ASTM E273, Pratique normalisée pour le contrôle par ultrasons de la zone des soudures des tuyauteries et des tubes soudés (Revision 2020)

Remplace ASTM E273 ( de juin 2015) .

Standard practice for ultrasonic testing of the weld zone of welded pipe and tubing

This practice describes general ultrasonic testing procedures for the detection of discontinuities in the weld and adjacent heat affected zones of welded pipe and tubing by scanning with relative motion between the search unit and pipe or tube. When contact or unfocused immersion search units are employed, this practice is intended for tubular products having specified outside diameters = 2 in. (= 50 mm) and specified wall thicknesses of 1/8 to 11/16 in. (3 to 27 mm). When properly focused immersion search units are employed, this practice may also be applied to material of smaller diameter and thinner wall. When contact or immersion phased array search units are employed, this practice may also be applied to material of above-mentioned outside diameters and wall thicknesses. When contact or unfocused immersion search units are used, precautions should be exercised when examining pipes or tubes near the lower specified limits. Certain combinations of search unit size, frequency, thin-wall thicknesses, and small diameters could cause generation of unwanted sound waves that may produce erroneous examination results. All surfaces of material to be examined in accordance with this practice shall be clean from scale, dirt, burrs, slag, spatter, or other conditions that would interfere with the examination results. The configuration of the weld must be such that interfering signals are not generated by reflections from it. Treatment of the inner surface and outer surface weld beads such as trimming (“scarfing”) or rolling is often required to remove protuberances that could result in spurious reflections. This practice does not establish acceptance criteria; they must be specified by the using parties.

Publié par ASTM le 01/12/2020

ASTM E494, Pratique normalisée pour la mesure de la vitesse des ondes ultrasonores dans les matériaux au moyen de comparaisons avec la méthode par réflexion (Revision 2020)

Remplace ASTM E494 ( de décembre 2015) .

Standard practice for measuring ultrasonic velocity in materials by comparative pulse-echo method

This practice covers a test procedure for measuring ultrasonic velocities in materials with conventional ultrasonic pulse echo flaw detection equipment in which results are displayed in an A-scan...