ASTM A578/A578M-96
(Specification)Standard Specification for Straight-Beam Ultrasonic Examination of Plain and Clad Steel Plates for Special Applications
Standard Specification for Straight-Beam Ultrasonic Examination of Plain and Clad Steel Plates for Special Applications
SCOPE
1.1 This specification covers the procedure and acceptance standards for straight-beam, pulse-echo, ultrasonic examination of rolled carbon and alloy plain and clad steel plates, 3/8 in. [10 mm] in thickness and over, for special applications. The method will detect internal discontinuities parallel to the rolled surfaces. Three levels of acceptance standards are provided. Supplementary requirements are provided for examination of clad plate and for alternative procedures.
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.
1.4 This 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 and health practices and determine the applicability of regulatory limitations prior to use.
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withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: A 578/A578M – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Straight-Beam Ultrasonic Examination of Plain and Clad
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Steel Plates for Special Applications
This standard is issued under the fixed designation A 578/A578M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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1. Scope Clad Plate, Sheet, and Strip
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A 265 Specification for Nickel and Nickel-Base Alloy-Clad
1.1 This specification covers the procedure and acceptance
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Steel Plate
standards for straight-beam, pulse-echo, ultrasonic examina-
3 2.2 ANSI Standard:
tion of rolled carbon and alloy plain and clad steel plates, ⁄8 in.
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B 46.1 Surface Texture
[10 mm] in thickness and over, for special applications. The
2.3 ASNT Standard:
method will detect internal discontinuities parallel to the rolled
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SNT-TC-1A
surfaces. Three levels of acceptance standards are provided.
Supplementary requirements are provided for examination of
3. Ordering Information
clad plate and for alternative procedures.
3.1 The inquiry and order shall indicate the following:
1.2 Individuals performing examinations in accordance with
3.1.1 Acceptance level requirements (Sections 7, 8, and 9).
this specification shall be qualified and certified in accordance
Acceptance Level B shall apply unless otherwise agreed to by
with the requirements of the latest edition of ASNT SNT-
purchaser and manufacturer.
TC-1A or an equivalent accepted standard. An equivalent
3.1.2 Any additions to the provisions of this specification as
standard is one which covers the qualification and certification
prescribed in 5.2, 13.1, and Section 10.
of ultrasonic nondestructive examination candidates and which
3.1.3 Supplementary requirements, if any.
is acceptable to the purchaser.
1.3 The values stated in either inch-pound units or SI units
4. Apparatus
are to be regarded separately as standard. Within the text, the
4.1 The amplitude linearity shall be checked by positioning
SI units are shown in brackets. The values stated in each
the transducer over the depth resolution notch in the IIW or
system are not exact equivalents; therefore, each system must
similar block so that the signal from the notch is approximately
be used independently of the other. Combining values from the
30 % of the screen height, and the signal from one of the back
two systems may result in nonconformance with the specifi-
surfaces is approximately 60 % of the screen height (two times
cation.
the height of the signal from the notch). A curve is then plotted
1.4 This standard does not purport to address all of the
showing the deviations from the above established 2:1 ratio
safety concerns, if any, associated with its use. It is the
that occurs as the amplitude of the signal from the notch is
responsibility of the user of this standard to establish appro-
raised in increments of one scale division until the back
priate safety and health practices and determine the applica-
reflection signal reaches full scale, and then is lowered in
bility of regulatory limitations prior to use.
increments of one scale division until the notch signal reaches
2. Referenced Documents one scale division. At each increment the ratio of the two
signals is determined. The ratios are plotted on the graph at the
2.1 ASTM Standards:
position corresponding to the larger signal. Between the limits
A 263 Specification for Corrosion-Resisting Chromium
3 of 20 and 80 % of the screen height, the ratio shall be within
Steel-Clad Plate, Sheet, and Strip
10 % of 2:1. Instrument settings used during inspection shall
A 264 Specification for Stainless Chromium-Nickel Steel-
not cause variation outside the 10 % limits established above.
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4.2 The transducer shall be 1 or 1 ⁄8 in. [25 or 30 mm] in
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This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
diameter or 1 in. [25 mm] square.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.11 on Steel Plates for Boilers and Pressure Vessels.
Current edition approved Sept. 10, 1996. Published November 1996. Originally
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published as A 578 – 67 T. Last previous edition A 578/A 578M – 92. Available from American National Standards Institute, 11 W. 42nd St., 13th
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For ASME Boiler and Pressure Vessel Code applications, see related Specifi- floor, New York, NY 10036.
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cation SA-578/SA-578M in Section II of that Code. Available from American Society for Nondestructive Testing, 1711 Arlingate
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Annual Book of ASTM Standards, Vol
...
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