ASTM E142-92
(Test Method)Method for Controlling Quality of Radiographic Testing (Withdrawn 2000)
Method for Controlling Quality of Radiographic Testing (Withdrawn 2000)
SCOPE
1.1 This method covers the radiographic testing of materials for internal discontinuities, and also the use of film and other recording media. Requirements expressed in this method are intended to control the reliability or quality of the radiographic images, and are not intended for controlling the acceptability or quality of materials or products.
1.2 The number of areas or parts to be radiographed and the acceptance standard to be applied shall be specified in the contract, purchase order, product specification, or drawings. The quality level required for radiography shall be at least 2% (2-2T), unless a higher or lower quality is agreed upon by the purchaser and the supplier. Note 1-For additional information, refer to Guide E94, Test Method E1030, and Method E1032.
1.3 The values stated in inch-pound units are to be regarded as standard.
1.4 This standard does not purport to address all of the safety problems, 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. (For specific safety precautionary information see Section 15.)
General Information
Standards Content (Sample)
Designation:E142–92 An American National Standard
Standard Method for
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Controlling Quality of Radiographic Testing
This standard is issued under the fixed designation E142; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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1. Scope E1316 Terminology for Nondestructive Examinations
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1.1 This method covers the radiographic testing of materi-
3. Terminology
als for internal discontinuities, and also the use of film and
3.1 Definitions— Refer to Terminology E1316 for other
other recording media. Requirements expressed in this method
terms used in this method.
are intended to control the reliability or quality of the radio-
graphic images, and are not intended for controlling the
4. Direction of Radiation
acceptability or quality of materials or products.
4.1 When not otherwise specified, the direction of the
1.2 Thenumberofareasorpartstoberadiographedandthe
central beam of radiation shall be perpendicular, wherever
acceptance standard to be applied shall be specified in the
possible, to the surface of the film.
contract, purchase order, product specification, or drawings.
The quality level required for radiography shall be at least 2%
5. Penetrameters
(2-2T), unless a higher or lower quality is agreed upon by the
5.1 The quality of all levels of radiographic testing shall be
purchaser and the supplier.
determined by a penetrameter that conforms to the require-
NOTE 1—Foradditionalinformation,refertoGuideE94,TestMethods
ments of Practice E1025.
E1030 and E1032.
6. Placement of Penetrameters
1.3 Thevaluesstatedininch-poundunitsaretoberegarded
6.1 Penetrameters shall be placed on the source side of the
as standard.
1.4 This standard does not purport to address all of the section being examined and should be placed so that the plane
of the penetrameter is normal to the radiation beam. If this is
safety problems, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- not practicable, placement of the penetrameter on a block is
acceptable provided the block is of radiographically similar
priate safety and health practices and determine the applica-
bilityofregulatorylimitationspriortouse.(Forspecificsafety material, is placed as close as possible to the item being
examined, and the resulting radiographic density of the block
precautionary information see Section 15.)
imageiswithinprescribedpenetrameter/areaofinterestdensity
2. Referenced Documents
variation tolerances.
2.1 ASTM Standards: 6.2 When radiographing welds, the penetrameters shall be
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E94 Guide for Radiographic Testing placed on the source side adjacent to the weld being radio-
E1025 Practice for Design, Manufacture, and Material graphed. When weld reinforcement or protruding backing ring
Grouping Classification of Hole-Type Image Quality Indi- is not removed, a shim of the same type of metal as the parent
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cators (IQI) Used for Radiology metal shall be placed under the penetrameter to provide the
E1030 Test Method for Radiographic Examination of Me- same thickness of material under the penetrameter as the
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tallic Castings average thickness through the weld. Shims shall exceed the
E1032 Test Method for Radiographic Examination of penetrameter dimensions such that the outline of at least three
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Weldments sides of the penetrameter image shall be visible on the
E1079 Practice for Calibration of Transmission Densitom- radiographandtheshimmedpenetrametershallbeplacedsoas
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eters not to overlap the backing strip or ring.
6.3 When examining double-walled parts such as piping or
duct with a radiation source outside the pipe, the penetrameter
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ThismethodisunderthejurisdictionofASTMCommitteeE-7onNondestruc-
shall be placed, where practicable, on the outside of the pipe
tive Testing and is the direct responsibility of Subcommittee E07.01 on Radio-
graphic Practice and Penetrameters.
alongside the weld nearest the source of radiation.
Current edition approved May 15, 1992. Published July 1992. Originally
6.3.1 In cases where placement of the penetrameter on the
published as E142–59T. Last previous edition E142–86.
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source side is impracticable, the penetrameter may be placed
ForASMEBoilerandPressureVesselCodeApplicationsseeSectionV,Article
22 of Method SE-142.
on the film side if one of the following conditions is met.
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