ASTM A388/A388M-04
(Practice)Standard Practice for Ultrasonic Examination of Heavy Steel Forgings
Standard Practice for Ultrasonic Examination of Heavy Steel Forgings
SCOPE
1.1 This practice covers the examination procedures for the contact, pulse-echo ultrasonic examination of heavy steel forgings by the straight and angle-beam techniques. The straight beam techniques include utilization of the DGS (Distance Gain-Size) method. See .
1.2 This practice is to be used whenever the inquiry, contract, order, or specification states that forgings are to be subject to ultrasonic examination in accordance with Practice A 388/A 388M.
1.3 The values stated in either inch-pound or SI units are to be regarded as the 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 specification and the applicable material specifications are expressed in both inch-pound units and SI units. However, unless the order specifies the applicable "M" specification designation [SI units], the material shall be furnished to inch-pound units.
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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Used in USNRC-RDT standards
Designation: A 388/A 388M – 04
Standard Practice for
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Ultrasonic Examination of Heavy Steel Forgings
This standard is issued under the fixed designationA 388/A 388M; 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.
1. Scope* of Ultrasonic Pulse-Echo Examination Instruments and
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Systems Without the Use of Electronic Measurement
1.1 Thispractice coverstheexaminationproceduresforthe
Instruments
contact, pulse-echo ultrasonic examination of heavy steel
E 428 Practice for Fabrication and Control of Steel Refer-
forgings by the straight and angle-beam techniques. The
ence Blocks Used in Ultrasonic Inspection
straight beam techniques include utilization of the DGS (Dis-
2.2 ANSI Standard:
tance Gain-Size) method. See Appendix X3.
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B 46.1 Surface Texture
1.2 This practice is to be used whenever the inquiry,
2.3 Other Document:
contract, order, or specification states that forgings are to be
Recommended Practice for Nondestructive Personnel Quali-
subject to ultrasonic examination in accordance with Practice
fication and Certification SNT-TC-1A, Supplement
A 388/A 388M.
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C—Ultrasonic Testing
1.3 The values stated in either inch-pound or SI units are to
be regarded as the standard. Within the text, the SI units are
3. Ordering Information
shown in brackets. The values stated in each system are not
3.1 When this practice is to be applied to an inquiry,
exact equivalents; therefore, each system must be used inde-
contract, or order, the purchaser shall so state and shall also
pendentlyoftheother.Combiningvaluesfromthetwosystems
furnish the following information:
may result in nonconformance with the specification.
3.1.1 Method of establishing the sensitivity in accordance
1.4 This specification and the applicable material specifica-
with 7.2.2 and 7.3.3 (Vee or rectangular notch),
tions are expressed in both inch-pound units and SI units.
3.1.1.1 The diameter and test metal distance of the flat-
However, unless the order specifies the applicable “M” speci-
bottom hole and the material of the reference block in
fication designation [SI units], the material shall be furnished
accordance with 7.2.2.2,
to inch-pound units.
3.1.2 Quality level for the entire forging or portions thereof
1.5 This standard does not purport to address all of the
in accordance with 10.3, and
safety concerns, if any, associated with its use. It is the
3.1.3 Any options in accordance with 6.1, 6.2, and 7.1.11.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Apparatus
bility of regulatory limitations prior to use.
4.1 An ultrasonic, pulsed, reflection type of instrument shall
2. Referenced Documents be used for this examination. The system shall have a mini-
3 mum capability for examining at frequencies from 1 to 5 MHz.
2.1 ASTM Standards:
On examining austenitic stainless forgings the system shall
A 469 Specification for Vacuum-Treated Steel Forgings for
have the capabilities for examining at frequencies down to 0.4
Generator Rotors
MHz.
A 745/A745M Practice for Ultrasonic Examination ofAus-
4.1.1 The ultrasonic instrument shall provide linear presen-
tenitic Steel Forgings
tation (within 5 %) for at least 75 % of the screen height
E 317 Practice for Evaluating Performance Characteristics
(sweep line to top of screen). The 5 % linearity referred to is
descriptive of the screen presentation of amplitude. Instrument
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linearity shall be verified in accordance with the intent of
This practice is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
Practice E 317.Any set of blocks processed in accordance with
A01.06 on Steel Forgings and Billets.
Practice E 317 or E 428 may be used to establish the specified
Current edition approved September 2004. Published October 2004. Originally
65 % instrument linearity.
approved in 1955. Last previous edition approved in 2003 as A 388/A 388M–03.
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For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-388/SA-388M in Section II of that Code.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from the American National Standards Institute, Inc., 25 W. 43rd
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Street, 4th floor, New York, NY 10036.
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Standards volume information, refer to the standard’s Document Summary page on Available from the American Society for Nondestructive Testing, 1711 Arlin-
the ASTM website. gate Ln., P.O. Box 285
...
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