Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Contact Testing

Importancia y uso:

5.1 This 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.

5.2 Although 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.

5.3 Types of information that may be obtained from the pulsed-echo straight-beam practice are as follows:

5.3.1 Apparent discontinuity size (see Note 1) by comparison of the signal amplitudes from the test piece to the amplitudes obtained from a reference standard.

5.3.2 Depth location of discontinuities by calibrating the horizontal scale of the A-scan display.

5.3.3 Material properties as indicated by the relative sound attenuation or velocity changes of compared items.

5.3.4 The 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.

Subcomité:

E07.06

Referida por:

B0495-22, B0351_B0351M-13R23, B0352_B0352M-17R21, E3167_E3167M-18R23, E1901-23, B0898-20, B0594-19E01, B0548-03R17, F0914_F0914M-20, G0158-23, E1816-18R22, F1430_F1430M-20, A0646_A0646M-24, B0350_B0350M-11R21, A0660_A0660M-21, E0543-21, E2981-21, E2533-21, E1106-12R21, E1781_E1781M-20, E3166-20E01, E0317-21, E0587-15R20, F1797-18R22, E3370-24, E0543-21

Volúmen:

03.03

Número ICS:

19.100 (Non-destructive testing)

Palabras clave:

contact; examination; nondestructive testing; pulse-echo; straight-beam; ultrasonic ;