ASTM A 577/A 577M Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates

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ASTM A 577/A 577M Document Information:

Title
Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates

ASTM International

Publication Date:
Dec 28, 1990

Scope:

This specification² 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 straightbeam 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.

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.

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.

² For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-577/SA-577M in Section II of that Code. Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://www.asme.org.

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