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1.1 This specification covers an ultrasonic angle-beam procedure and acceptance standards for the detection of internal discontinuities not laminar in nature and of surface imperfections in a steel plate. This specification is intended for use only as a supplement to specifications which provide straight-beam ultrasonic examination.
Note 1--An internal discontinuity that is laminar in nature is one whose principal plane is parallel to the principal plane of the plate.
1.2 Individuals performing examinations in accordance with this specification shall be qualified and certified in accordance with the requirements of the latest edition of ASNT SNT-TC-1A or an equivalent accepted standard. An equivalent standard is one which covers the qualification and certification of ultrasonic nondestructive examination candidates and which is acceptable to the purchaser.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
ICS Number Code 77.040.20 (Non-destructive testing of metals)
UNSPSC Code 30102204(Steel plate)
ASTM A577 / A577M-90(2001), Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates, ASTM International, West Conshohocken, PA, 2001, www.astm.orgBack to Top