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Standard Reference Radiographs for Appearances of Radiographic Images as Certain Parameters Are Changed
Automaticky přeložený název:
Standardní referenční Rentgenové snímky pro vystoupení radiografické snímků za určitých parametrů se změní
NORMA vydána dne 1.6.2010
Označení normy: ASTM E242-01(2010)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.6.2010
Kód zboží: NS-45267
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
film systems, discontinuities, gamma rays, reference radiographs, steel, unsharpness, welds, x-ray, Welding/welds, X-irradiation, Appearance, Discontinuities, Gamma radiation, Parameters, Radiographic examination, Reference radiographs, Steel, Unsharpness, ICS Number Code 19.100 (Non-destructive testing)
Significance and Use | ||||||||||||
A key consideration with any radiographic system is its capability to resolve detail (that is, sensitivity). The degree of obtainable sensitivity with a given system is dependent upon several radiographic parameters such as source energy level, film system, type and thickness of intensifying screens, and material thickness radiographed. These reference radiographs permit the user to estimate the degree of sensitivity change that may be obtained when these parameters are varied from a specific technique. This standard may also be used in conjunction with Test Method E1815 or with Test Method E746 to provide a basis for developing data for evaluation of a user's specific system. This data may assist a user in determining appropriate parameters for obtaining desired degrees of radiographic system sensitivity. |
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1. Scope | ||||||||||||
1.1 This document describes the appearance of a radiographic image where fundamental components of image quality are changed, that is, variables such as whether an X-ray or gamma ray source was used, the characteristics of the radiographic film and intensifying screens, and the geometrical configuration of the object under investigation as well as its associated radiographic set-up. 1.2 These reference radiographs consist of four composite illustrations and show how such factors as radiation energy, specimen thickness, and film properties affect the radiographic image. The reference radiograph films are an adjunct to this document and must be purchased separately from ASTM if needed. 1.3 The values stated in inch-pound units are to be regarded as the standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||
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