Документы

ASTM International

Standard Reference Radiographs for Heavy-Walled (2 to 41?2-in. (50.8 to 114-mm)) Steel Castings
 N E186

Annotation

These reference radiographs2 illustrate various categories, types and severity levels of discontinuities occurring in steel castings that have section thicknesses of 2 to less than 41 2 in. (50.8 to 114 mm). The reference radiograph films are an adjunct to this document and must be purchased separately from ASTM International, if needed (see 2.2). Categories and severity levels for each discontinuity type represented by these reference radiographs are described in 1.2.1. Note that the basis of application for these reference radiographs requires a prior purchaser/supplier agreement of radiographic examination attributes and classification criterion as described in Sections 4, 6, and 7 of this standard. Reference radiographs for other steel casting thicknesses may be found in Reference Radiograph standards E446 and E280. Reference Radiograph standards E446 and E280 provide some overlap of severity levels for similar discontinuity categories within the same energy level range (see 4.2, 5.1, and 6.3)

These reference radiographs consist of three separate volumes as follows:

Volume I: 1–MV X-rays and Iridium 192 (called "1 to 2–Mev X-rays" in previous editions)-Set of 28 plates (nominal 5 by 8 in. (127 by 203 mm) in a 15 by 17 in. (381 by 432 mm) ring binder).

Volume II: 2–MV X-rays and Cobalt-60 (called "gamma rays" in previous editions). This includes cobalt-60 or equivalent isotope radiation and from 2–MV up to 4–MV X-rays- Set of 28 plates (nominal 5 by 8 in.) in a 15 by 17 in. ring binder.

Volume III: 4–MV to 30–MV X-rays (called "10 to 24 Mev X-rays" in previous editions)- Set of 28 plates (nominal 5 by 8 in.) in a 15 by 17 in. ring binder.