Standard Reference Radiographs for Ductile Iron Castings

Importancia y uso:

4.1 The casting process has demonstrated radiographic similarities between internal discontinuities for ductile cast iron and cast steel to the extent that the reference radiographs for steel castings are applicable. The exact application and usage of discontinuity classifications contained within steel casting reference radiographs must, however, give consideration to the differences in material properties between cast steel and ductile cast iron. In some applications, reference radiographs for steel castings may not be entirely applicable to ductile cast iron material dependent upon design or other usage criteria.

4.2 When employing steel casting reference radiographs to evaluate ductile iron castings for film radiography, the applicable E446, E186, or E280 steel casting written standard shall also be used for specific guidance and evaluation procedures. When employing digital radiographic methods, the digital reference images in Digital Reference Images E2868 and E3030 shall be used.

4.3 These reference radiographs are intended as a basis from which manufacturers and purchasers may, by mutual agreement, select particular discontinuity classes to serve as standards representing minimum levels of acceptability. Reference radiographs represented by these steel casting standards may be used, as agreed upon in a purchaser supplier agreement, for radiation energy levels, thicknesses, or both, outside the range of these standards when determined applicable for the casting service application

4.4 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).

Subcomité:

E07.02

Referida por:

E1109-19, A0834-24, A0395_A0395M-99R22, A0874_A0874M-98R22, E1030_E1030M-21, E1030_E1030M-21

Volúmen:

03.03

Número ICS:

77.080.10 (Irons)

Palabras clave:

classification; discontinuity; ductile iron castings; gamma ray; reference radiographs; X-ray;