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Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Contact TestingPřeložit název
NORMA vydána dne 1.12.2020
Označení normy: ASTM E114-20
Datum vydání normy: 1.12.2020
Kód zboží: NS-1013605
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
contact, examination, nondestructive testing, pulse-echo, straight-beam, ultrasonic ,, ICS Number Code 19.100 (Non-destructive testing)
|Significance and Use|
5.1This practice employs the use of normal-incident, or straight beam, longitudinal wave ultrasound for the detection and evaluation of discontinuities in materials requiring volumetric examination.
5.2Although not all requirements of this practice can be applied universally to all inspection situations and materials, it does provide the basis for establishing contractual criteria between suppliers and purchasers of materials for performing contact longitudinal wave pulse-echo examination and may be used as a guide for writing detailed procedures for particular applications.
5.3Types of information that may be obtained from the pulsed-echo straight-beam practice are as follows:
5.3.1Apparent discontinuity size (see Note 1) by comparison of the signal amplitudes from the test piece to the amplitudes obtained from a reference standard.
5.3.2Depth location of discontinuities by calibrating the horizontal scale of the A-scan display.
5.3.3Material properties as indicated by the relative sound attenuation or velocity changes of compared items.
5.3.4The extent of bond and unbond (or fusion and lack of fusion) between two ultrasonic conducting materials if geometry and materials permit.
Note 1:The term apparent is emphasized since true size depends on orientation, composition, and geometry of the discontinuity and equipment limitations.
1.1This practice1.2This practice shall be applicable to development of an examination procedure agreed upon by the users of the document.
1.3UnitsThe 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.
1.4This 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.
1.5This 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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