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ASTM A531/A531M-91(1996)

(Practice)

Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings

Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings

SCOPE
1.1 This practice covers the procedures to be followed when performing ultrasonic shear and longitudinal wave tests on turbine-generator retaining rings 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 Although this practice describes methods of ultrasonically testing retaining rings by either the contact or immersion method, it shall not restrict the use of improved inspection methods as they are developed. It is recognized that techniques for examination and evaluation may be chosen in order to enhance or improve the results or to accommodate variations in procedures, equipment, or capabilities. Considering these characteristics, forgings may be inspected by a combination of both the contact and the immersion methods, as mutually agreed upon between the manufacturer and the purchaser.
1.3 This practice 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.
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.

General Information

Status
Historical
Publication Date
14-Dec-1991
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.06 - Steel Forgings and Billets
Current Stage
Ref Project

Relations

Replaced By
ASTM A531/A531M-91(2001) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
Effective Date
15-Dec-1991

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ASTM A531/A531M-91(1996) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining RingsASTM A531/A531M-91(1996) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
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ASTM A531/A531M-91(1996) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: A 531/A 531M – 91 (Reapproved 1996) An American National Standard
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 Practice for
Ultrasonic Examination of Turbine-Generator Steel Retaining
1
Rings
This standard is issued under the fixed designation A 531/A 531M; 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 3. Personnel Requirements
1.1 This practice covers the procedures to be followed when 3.1 The manufacturer shall be responsible for assigning
performing ultrasonic shear and longitudinal wave tests on qualified personnel to perform ultrasonic examination in con-
turbine-generator retaining rings with an inside diameter to formance with the requirements of this practice.
wall thickness ratio equal to or greater than 5:1 and with wall 3.2 Personnel performing ultrasonic examinations in accor-
thicknesses from 1 to 4 in. (25 to 102 mm). dance with this practice shall be familiar with the following:
1.2 Although this practice describes methods of ultrasoni- 3.2.1 Ultrasonic terminology,
cally testing retaining rings by either the contact or immersion 3.2.2 Instrument calibration,
method, it shall not restrict the use of improved inspection 3.2.3 Effect of transducer material, size, frequency, and
methods as they are developed. It is recognized that techniques mode on test results,
for examination and evaluation may be chosen in order to 3.2.4 Effect of material structure (grain size, cleanliness,
enhance or improve the results or to accommodate variations in etc.) on test results,
procedures, equipment, or capabilities. Considering these char- 3.2.5 Effect of test distance on test results,
acteristics, forgings may be inspected by a combination of both 3.2.6 Effect of nonlinearity on test results,
the contact and the immersion methods, as mutually agreed 3.2.7 Effect of thickness and orientation of discontinuities
upon between the manufacturer and the purchaser. on test results, and
1.3 This practice and the applicable material specifications 3.2.8 Effect of surface roughness on test results.
are expressed in both inch-pound units and SI units. However, 3.3 A qualification record (see Note 1) of personnel consid-
unless the order specifies the applicable “M” specification ered suitable by the manufacturer to perform examination in
designation SI units, the material shall be furnished to inch- accordance with this practice shall be available upon request.
pound units.
NOTE 1—SNT-TC-1 A, Ultrasonic Testing Method, provides a recom-
1.4 This standard does not purport to address all of the
mended procedure for qualifying personnel. Other personnel qualification
safety concerns, if any, associated with its use. It is the
requirement documents may be used when agreed upon between the
responsibility of the user of this standard to establish appro-
purchaser and supplier.
priate safety and health practices and determine the applica-
4. Ordering Information
bility of regulatory limitations prior to use.
4.1 When this practice is to be applied to an inquiry,
contract, or order, the purchaser shall so state and shall also
2. Referenced Documents
furnish the following information:
2.1 ASTM Standards:
4.1.1 The method or combination of methods to be used for
E 127 Practice for Fabricating and Checking Aluminum
inspection.
2
Alloy Ultrasonic Standard Reference Blocks
4.1.2 The frequency to be used for conducting each inspec-
2.2 Other Document:
tion.
Recommended Practice for Nondestructive Personnel Quali-
4.1.3 Report requirements including C-scan plot, if appli-
fication and Certification SNT-TC-1A, Supplement
cable.
3
C-Ultrasonic Testing
5. General Requirements
5.1 As far as possible the entire volume of the retaining
rings shall be subject to ultrasonic inspection. Circumferential
1
This practice is under the jurisdiction of ASTM Committee A-1 on Steel,
and axial faces shall be machined flat and parallel to one
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
A01.06on Steel Forgings and Billets. another.
Current edition approved Dec. 15, 1991. Published February 1992. Originally
5.2 The ultrasonic inspection shall be performed after final
published as A 531 – 65. Last previous edition A 531/A 531M – 90.
processing and heat treatment for properties, unless otherwise
2
Annual Book of ASTM Standards, Vol 03.03.
3
specified in the order or contract.
Available from the American Society for Nondestructive Testing, 914 Chicago
Ave., Evanston, IL 60202.
...

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1.1 This specification covers UNS N06002, UNS N06030, UNS N06035, UNS N06022, UNS N06200, UNS N10362, UNS N06230, UNS N06600, UNS N06617, UNS N06625, UNS N08020, UNS N08026, UNS N08024, UNS N08120, UNS N08926, UNS N08367, UNS N10242, UNS N10276, UNS N10665, UNS N10675, UNS N12160, UNS R20033, UNS N06059, UNS N06686, UNS N10629, UNS N08031, UNS N06045, UNS N06025, UNS N06699, and UNS R305562 billets and bars for reforging.  
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