Standard Practice for Fabrication and Control of Flat Bottomed Hole Ultrasonic Standard Reference BlocksName übersetzen
NORM herausgegeben am 1.12.2020
Bezeichnung normen: ASTM E127-20
Ausgabedatum normen: 1.12.2020
Zahl der Seiten: 16
Gewicht ca.: 48 g (0.11 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
aluminum reference blocks, area-amplitude reference blocks, distance-amplitude reference blocks, nondestructive testing, standard reference blocks, ultrasonic reference blocks,, ICS Number Code 77.040.01 (Testing of metals in general),77.120.10 (Aluminium and aluminium alloys)
|Significance and Use|
5.1Standard reference block sets per fabricated in accordance with this practice will exhibit specific area-amplitude and distance amplitude relationships only with an immersion test at 5MHz using the search unit, test instrument, and test parameters described in this practice. Comparison tests at other frequencies or with uncalibrated instruments will not necessarily give the same relationships shown in this practice. See Ref () for area-amplitude limitations at other frequencies and transducer diameters. Also see Ref 5.2Reference standards fabricated per may utilize the fabrication and verification techniques herein. Due to the variable nature of non-standard blocks, the details should be agreed upon in the ordering documents.
1.1This practice covers a procedure for fabrication and control of metal alloy reference blocks used in ultrasonic examinations that contain flat bottom holes (FBH).
1.2These blocks may be used for checking the performance of ultrasonic examination instrumentation and search units and for standardization and control of ultrasonic examination of metal alloy products.
1.3The reference blocks described are suitable for use with either the direct-contact method or immersion pulse-echo ultrasonic methods.
1.4Standard sets are described for flat surface sound entry; the Basic set, Area-Amplitude set, and Distance Amplitude set.
1.5The requirements for FBH fabrication may be applied to round bar/billet reference standards and reference standards fabricated from other product forms.
1.6This practice does not specify reference reflector sizes or product rejection limits. It does describe fabrication practices and applied tolerances. In all cases of conflict between this practice and customer specifications, the customer specification shall prevail.
1.7The 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.
1.8This practice has incorporated the requirements of Practice and Guide . Reference standards that were manufactured under Practice and Guide comply with the requirements of this practice.
1.9This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.10This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
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