Standard Practice for Fabrication and Control of Flat Bottomed Hole Ultrasonic Standard Reference BlocksTranslate name
STANDARD published on 1.12.2020
Designation standards: ASTM E127-20
Publication date standards: 1.12.2020
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: American technical standard
Category: Technical standards 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|
5.1ï¿½Standard 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 5â€‰MHz 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 5.2ï¿½Reference 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.
1.1ï¿½This practice covers a procedure for fabrication and control of metal alloy reference blocks used in ultrasonic examinations that contain flat bottom holes (FBH).
1.2ï¿½These 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.
1.3ï¿½The reference blocks described are suitable for use with either the direct-contact method or immersion pulse-echo ultrasonic methods.
1.4ï¿½Standard sets are described for flat surface sound entry; the Basic set, Area-Amplitude set, and Distance Amplitude set.
1.5ï¿½The requirements for FBH fabrication may be applied to round bar/billet reference standards and reference standards fabricated from other product forms.
1.6ï¿½This 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.
1.7ï¿½The 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.
1.8ï¿½This 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.
1.9ï¿½This 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.
1.10ï¿½This 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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