Standard Reference Radiographs for Inspection of Aluminum and Magnesium Castings

Importancia y uso:

4.1 Personnel utilizing reference radiographs to this standard shall be qualified and authorized to perform radiographic interpretation in accordance with a nationally or internationally recognized NDT personnel qualification practice or standard such as ANSI/ASNT-CP-189, SNT-TC-1A, NAS 410, ISO 9712 or a similar document 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. A certified Level III shall be available to assist with interpreting specifications and product requirements as applied to the reference radiographs (if the Level III is the radiographic interpreter, this may be the same person).

4.2 These radiographs 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 radiographs. The illustrations are radiographs of castings that were produced under conditions designed to develop the discontinuities. The radiographs 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 radiographs 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). The grouping and system of designations are based on considerations of the best practical means of making these reference radiographs of the greatest possible value.

4.3 Film Deterioration—Radiographic films are subject to wear and tear from handling and use. The extent to which the image deteriorates over time is a function of storage conditions, care in handling and amount of use. Reference radiograph films are no exception and may exhibit a loss in image quality over time. The radiographs should therefore be periodically examined for signs of wear and tear, including scratches, abrasions, stains, and so forth. Any reference radiographs which show signs of excessive wear and tear which could influence the interpretation and use of the radiographs should be replaced.

Subcomité:

E07.02

Referida por:

B0080-23, E2422-22, B0026_B0026M-18E01, B0403-20, B0618_B0618M-18E01, B0108_B0108M-19, B0969_B0969M-18E01, F3318-18, B0199-17, B0955_B0955M-18, E2736-17R22, E2869-17, E1030_E1030M-21, B0686_B0686M-18, E1648-20, E1030_E1030M-21, E0505-22

Volúmen:

03.03

Número ICS:

77.040.20 (Non-destructive testing of metals), 77.150.10 (Aluminium products), 77.150.20 (Magnesium products)

Palabras clave:

aluminum; castings; discontinuities; magnesium; reference radiographs; X-ray;