ASTM A531/A531M-18
(Practice)Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
ABSTRACT
This test method covers the procedures for the standard practice of performing ultrasonic shear and longitudinal wave examinations on turbine-generator steel retaining rings. A pulsed reflection-type ultrasonic instrument shall be used for the tests. Scanning of steel specimens may be performed by either the contact (stationary) or immersion (rotating) methods, both of which may be executed in either the axial or circumferential directions. Tests shall be performed after specimens have gone through final processing and heat treatment for properties, and the circumferential and axial faces machined flat and parallel to one another. Also prior to testing, surface examinations shall be made for surface roughness and tears, loose scales, machining or grinding particles, paint, and other foreign and extraneous matter. Suitable couplant liquids, capable of conducting ultrasonic vibrations, shall be used to couple the transducer to test surfaces.
SCOPE
1.1 This practice covers ultrasonic examination of turbine-generator retaining rings produced in accordance with Specifications A288 and A289/A289M with an inside diameter to wall thickness ratio equal to or greater than 5:1 and with wall thicknesses from 1 to 4 in. [25 to 102 mm].
1.2 Forgings may be inspected by either the contact or the immersion methods, or combinations thereof, as agreed upon between the manufacturer and the purchaser.
1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.4 This practice is expressed in inch-pound and SI units; however, unless the purchase order or contract specifies the applicable “M” specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the practice, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation: A531/A531M − 18
Standard Practice for
Ultrasonic Examination of Turbine-Generator Steel Retaining
1
Rings
This standard is issued under the fixed designation A531/A531M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2
1.1 This practice covers ultrasonic examination of turbine- 2.1 ASTM Standards:
generator retaining rings produced in accordance with Speci- A288 Specification for Carbon and Alloy Steel Forgings for
fications A288 and A289/A289M with an inside diameter to Magnetic Retaining Rings for Turbine Generators
wall thickness ratio equal to or greater than 5:1 and with wall A289/A289M Specification for Alloy Steel Forgings for
thicknesses from 1 to 4 in. [25 to 102 mm]. Nonmagnetic Retaining Rings for Generators
E127 Practice for Fabrication and Control of Aluminum
1.2 Forgings may be inspected by either the contact or the
Alloy Ultrasonic Standard Reference Blocks
immersion methods, or combinations thereof, as agreed upon
E317 Practice for Evaluating Performance Characteristics of
between the manufacturer and the purchaser.
Ultrasonic Pulse-Echo Testing Instruments and Systems
1.3 Supplementary requirements of an optional nature are
without the Use of Electronic Measurement Instruments
provided for use at the option of the purchaser. The supple-
2.2 Other Documents:
mentary requirements shall apply only when specified indi-
ANSI/ASME B46.1 Surface Texture (Surface Roughness,
vidually by the purchaser in the purchase order or contract.
3
Waviness and Lay)
1.4 This practice is expressed in inch-pound and SI units; Recommended Practice No. SNT-TC-1A Personnel Qualifi-
4
however, unless the purchase order or contract specifies the
cation and Certification in Nondestructive Testing
applicable “M” specification designation (SI units), the inch-
3. Personnel Requirements
pound units shall apply. The values stated in either SI units or
inch-pound units are to be regarded separately as standard.
3.1 Personnel performing ultrasonic examinations to this
Within the practice, the SI units are shown in brackets. The
practice shall be qualified and certified in accordance with a
values stated in each system may not be exact equivalents;
written procedure conforming to Recommended Practice No.
therefore, each system shall be used independently of the other.
SNT-TC-1A or other national standard acceptable to both the
Combining values from the two systems may result in noncon-
purchaser and the supplier.
formance with the standard.
4. Ordering Information
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 When this practice is to be applied to an inquiry,
responsibility of the user of this standard to establish appro-
contract, or order, the purchaser shall so state and shall also
priate safety, health, and environmental practices and deter-
furnish the following information:
mine the applicability of regulatory limitations prior to use.
4.1.1 The method or combination of methods to be used for
1.6 This international standard was developed in accor-
inspection.
dance with internationally recognized principles on standard-
4.1.2 The frequency to be used for conducting each inspec-
ization established in the Decision on Principles for the
tion.
Development of International Standards, Guides and Recom-
4.1.3 Report requirements including C-scan plot, if appli-
mendations issued by the World Trade Organization Technical
cable.
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This practice is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee the ASTM website.
3
A01.06 on Steel Forgings and Billets. Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
Current edition approved May 1, 2018. Published May 2018. Originally 4th Floor, New York, NY 10036, http://www.ansi.org.
4
approved in 1965. Last previous edition approved in 2013 as A531/A531M – 13. Available from American Society for Nondestructive Testing (ASNT), P.O. Box
DOI: 10.1520/A0531_A0531M-18. 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A531/A531M − 13 A531/A531M − 18
Standard Practice for
Ultrasonic Examination of Turbine-Generator Steel Retaining
1
Rings
This standard is issued under the fixed designation A531/A531M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers ultrasonic examination of turbine-generator retaining rings produced in accordance with Specifications
A288 and A289/A289M with an inside diameter to wall thickness ratio equal to or greater than 5:1 and with wall thicknesses from
1 to 4 in. [25 to 102 mm].
1.2 Forgings may be inspected by either the contact or the immersion methods, or combinations thereof, as agreed upon between
the manufacturer and the purchaser.
1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The supplementary
requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.4 This practice is expressed in inch-pound and SI units; however, unless the purchase order or contract specifies the applicable
“M” specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or inch-pound units
are to be regarded separately as standard. Within the practice, the SI units are shown in brackets. The values stated in each system
may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two
systems may result in nonconformance with the standard.
1.5 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A288 Specification for Carbon and Alloy Steel Forgings for Magnetic Retaining Rings for Turbine Generators
A289/A289M Specification for Alloy Steel Forgings for Nonmagnetic Retaining Rings for Generators
E127 Practice for Fabrication and Control of Aluminum Alloy Ultrasonic Standard Reference Blocks
E317 Practice for Evaluating Performance Characteristics of Ultrasonic Pulse-Echo Testing Instruments and Systems without the
Use of Electronic Measurement Instruments
2.2 Other Documents:
3
ANSI/ASME B46.1 Surface Texture (Surface Roughness, Waviness and Lay)
4
Recommended Practice No. SNT-TC-1A Personnel Qualification and Certification in Nondestructive Testing
3. Personnel Requirements
3.1 Personnel performing ultrasonic examinations to this practice shall be qualified and certified in accordance with a written
procedure conforming to Recommended Practice No. SNT-TC-1A or other national standard acceptable to both the purchaser and
the supplier.
1
This practice is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee A01.06 on
Steel Forgings and Billets.
Current edition approved May 1, 2013May 1, 2018. Published June 2013May 2018. Originally approved in 1965. Last previous edition approved in 20122013 as
A531/A531M – 12.A531/A531M – 13. DOI: 10.1520/A0531_A0531M-13.10.1520/A0531_A0531M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
4
Available from American Society for Nondestructive Testing (ASNT), P.O. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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