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ASTM A531/A531M-18(2023)

(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 in. to 4 in. [25 mm 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.

General Information

Status
Published
Publication Date
14-Mar-2023
ICS
21.060.60 - Rings, bushes, sleeves, collars
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.06 - Steel Forgings and Billets
Current Stage
Ref Project

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ASTM A531/A531M-18(2023) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining RingsASTM A531/A531M-18(2023) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
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ASTM A531/A531M-18(2023) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
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Standards Content (Sample)

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.
Designation: A531/A531M − 18 (Reapproved 2023)
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 in. to 4 in. [25 mm to 102 mm]. Nonmagnetic Retaining Rings for Generators
E127 Practice for Fabrication and Control of Flat Bottomed
1.2 Forgings may be inspected by either the contact or the
Hole 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 March 15, 2023. Published April 2023. Originally 4th Floor, New York, NY 10036, http://www.ansi.org.
4
approved in 1965. Last previous edition approved in 2018 as A531/A531M – 18. Available from American Society for Nondestructive Testing (ASNT), P.O. Box
DOI: 10.1520/A0531_A0531M-18R23. 28518, 1711 Arlingate Ln., Columbus, OH 43228-
...

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4.2 Neutron Field Characterization—The tasks required to satisfy the second part of the objective of 4.1 are complex and are summarized in Practice E853. In doing this, it is necessary to describe the neutron field at selected (r, θ, z) points within the pressure vessel wall. The description can be either time dependent or time averaged over the reactor service period of interest. This description can best be obtained by combining neutron transport calculations with plant measurements such as reactor cavity (ex-vessel) and surveillance capsule or RPV cladding (in-vessel) measurements, benchmark irradiations of dosimeter sensor materials, and knowledge of th...
SCOPE
1.1 This guide establishes the means and frequency of monitoring the neutron exposure of the LWR reactor pressure vessel throughout its operating life.  
1.2 The physics-dosimetry relationships determined from this guide may be used to estimate reactor pressure vessel damage through the application of Practice E693 and Guide E900, using fast neutron fluence (E > 1.0 MeV and E > 0.1 MeV), displacements per atom (dpa), or damage-function-correlated exposure parameters as independent exposure variables. Supporting the application of these standards are the E853, E944, E1005, and E1018 standards, identified in 2.1.  
1.3 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.  
1.4 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.

  • Guide
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  • Guide
    12 pages
    English language
    sale 15% off