ASTM E242 - 15 - Standard Reference Radiographs for Appearances of Radiographic Images as Certain Parameters are Changed

ASTM E242 - 15

Standard Reference Radiographs for Appearances of Radiographic Images as Certain Parameters are Changed

Status : Current   Published : January 2015

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PDF

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HARDCOPY



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 (gradient, granularity, and developing conditions) and intensifying screens, and specimen thickness (the geometrical configuration of the radiographic set-up and focal spot size both affect image quality but are not considered in the reference radiographs).

1.2 The X-ray film systems used in obtaining the illustrative data were as follows: Very Fine Grain (comparable to class I of Test Method E1815) and Fine Grain (comparable to class II of Test Method E1815).

1.3 These reference radiographs 2 consist of four composite illustrations 3 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.

1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5  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.




Standard NumberASTM E242 - 15
TitleStandard Reference Radiographs for Appearances of Radiographic Images as Certain Parameters are Changed
StatusCurrent
Publication Date01 January 2015
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Appearance, Crystal Structure And Defects, Discontinuities, Gamma Radiography, Image Quality, Image Resolution And Quality, Photographic Films, Radiographic Films, Reference Radiographs, X-Ray Radiography
ICS19.100
PublisherASTM
FormatA4
DeliveryYes
Pages4
File Size78 KB
Price£36.00


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