Standard Digital Reference Images for Inspection of Aluminum Castings
Importancia y uso:
4.1 Personnel utilizing reference radiographs to this standard shall be qualified to perform radiographic interpretation in accordance with a nationally or internationally recognized NDT personnel qualification practice or standard and certified by the employer or certifying agency, as applicable. The practice or standard used and its applicable revision shall be identified in the contractual agreement between the using parties. If assistance is needed with interpreting specifications and product requirements as applied to the reference radiographs, a certified Level III shall be consulted before accept/reject decisions are made (if the Level III is the radiographic interpreter, this may be the same person).
4.2 These digital reference images are intended for reference only, but are so designed that acceptance standards, which may be developed for particular requirements, can be specified in terms of these digital reference images. The illustrations are digital images of castings that were produced under conditions designed to develop the discontinuities. The images of the 1/4-in. (6.35-mm) castings are intended to be used in the thickness range up to and including 1/2-in. (12.7 mm). The images of the 3/4-in. (19.1-mm) castings are intended to be used in the thickness range of over 1/2 in., up to and including 2 in. (51 mm).
4.3 Image Deterioration—Many conditions can affect the appearance and functionality of digital reference images. For example, electrical interference, hardware incompatibilities, and corrupted files or drivers may affect their appearance. The ASTM E2002 line pair gauges located in the lower right hand corner of each digital reference can be used as an aid to detect image deterioration by comparing the measured resolution using the gauges to the resolution stated on the digital reference image. Do not use the digital reference images if their appearance has been adversely affected such that the interpretation and use of the images could be influenced.
4.4 Agreement should be reached between cognizant engineering organization and the supplier that the system used by the supplier is capable of detecting and classifying the required discontinuities.
Subcomité:
E07.02
Referida por:
E0155-20, B0026_B0026M-18E01, E2007-10R23, E3420-24, B0618_B0618M-18E01, B0108_B0108M-19, B0969_B0969M-18E01, B0955_B0955M-18, E2736-17R22, E0155-20, B0686_B0686M-18, E3327_E3327M-21
Volúmen:
03.04
Número ICS:
77.150.10 (Aluminium products)
Palabras clave:
aluminum; castings; digital reference image; discontinuities; X-ray;