ASTM E570-15e1
(Practice)Standard Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
Standard Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
SIGNIFICANCE AND USE
5.1 This practice outlines a procedure for examining ferromagnetic tubular products using the flux leakage method. If properly applied, this method is capable of detecting the presence and location of significant longitudinally or transversely oriented discontinuities such as pits, scabs, slivers, gouges, roll-ins, laps, seams, cracks, holes, and improper welds in ferromagnetic tubes under inspection. In addition, the severity of a discontinuity may be estimated and a rejection level set with respect to the magnitude of the electromagnetic indication produced by the discontinuity.
5.2 The response from natural discontinuities can be significantly different from the response for artificial discontinuities such as drilled holes or notches of equivalent depth. For this reason, sufficient work should be done to determine the conditions necessary to detect and mark natural discontinuities whose characteristics will adversely affect the serviceability of the tube, in order to establish acceptance criteria between the supplier and purchaser.
SCOPE
1.1 This practice covers the application and standardization of equipment using the flux leakage test method for detection of outer surface, inner surface, and subsurface discontinuities in ferromagnetic steel tubular products (Note 1) of uniform cross section such as seamless and welded tubing.
Note 1: The term “tube” or “tubular product” will be used to refer to both pipe and tubing.
1.2 This practice is intended for use on tubular products having outside diameters from approximately 1/2 to 24 in. (12.7 to 610 mm) with wall thicknesses to 1/2 in. (12.7 mm). These techniques have been used for other sizes, however, and may be so specified upon contractual agreement between the purchaser and the supplier.
1.3 This practice does not establish acceptance criteria; they must be specified by the using parties.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address 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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´1
Designation: E570 − 15
Standard Practice for
Flux Leakage Examination of Ferromagnetic Steel Tubular
1
Products
This standard is issued under the fixed designation E570; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1
ε NOTE—Editorially corrected 10.1.1 in March 2016.
1. Scope* E543 Specification for Agencies Performing Nondestructive
Testing
1.1 This practice covers the application and standardization
E1316 Terminology for Nondestructive Examinations
of equipment using the flux leakage test method for detection
2.2 Other Documents:
of outer surface, inner surface, and subsurface discontinuities
SNT-TC-1A Recommended Practice for Personnel Qualifi-
in ferromagnetic steel tubular products (Note 1) of uniform
cation and Certification of NondestructiveTesting Person-
cross section such as seamless and welded tubing.
3
nel
NOTE 1—The term “tube” or “tubular product” will be used to refer to
ANSI/ASNT CP-189 ASNT Standard for Qualification and
both pipe and tubing.
3
Certification of Nondestructive Testing Personnel
1.2 This practice is intended for use on tubular products
NAS-410 NAS Certification and Qualification of Nonde-
1 4
having outside diameters from approximately ⁄2 to 24 in. (12.7
structive Personnel (Quality Assurance Committee)
1
to 610 mm) with wall thicknesses to ⁄2 in. (12.7 mm). These
ISO 9712 Non-destructive Testing—Qualification and Cer-
5
techniques have been used for other sizes, however, and may
tification of NDT Personnel
be so specified upon contractual agreement between the
purchaser and the supplier. 3. Terminology
1.3 This practice does not establish acceptance criteria; they 3.1 Definitionsoftermsrelatingtofluxleakageexamination
must be specified by the using parties. are provided in Terminology E1316.
1.4 The values stated in inch-pound units are to be regarded
4. Summary of Practice
asthestandard.Thevaluesgiveninparenthesesaremathemati-
4.1 This method consists of the following steps:
cal conversions to SI units that are provided for information
4.1.1 The tube wall is magnetized at the area under exami-
only and are not considered standard.
nation to a proper level approaching magnetic saturation.
1.5 This standard does not purport to address the safety
NOTE 2—Tubes subjected to magnetic inspections can retain various
concerns, if any, associated with its use. It is the responsibility
strengthsandconfigurationofresidualmagneticfieldsdependinguponthe
of the user of this standard to establish appropriate safety and
magnetization technique. If the residual field resulting from a given
health practices and determine the applicability of regulatory
technique can interfere with subsequent applications of the tube, then a
limitations prior to use.
supplemental demagnetization process may be required.
4.1.2 A flux sensor containing magnetic transducers is
2. Referenced Documents
placed on or above the outside surface of the tube in the
2
2.1 ASTM Standards:
magnetized area.
4.1.3 Either the tube or the flux sensor is moved at a
constant speed in the direction of the magnetic field so that the
1
This practice is under the jurisdiction of ASTM Committee E07 on Nonde-
sensor scans the entire surface of the tube.
structive Testing and is the direct responsibility of Subcommittee E07.07 on
Electromagnetic Method.
CurrenteditionapprovedJune1,2015.PublishedJuly2015.Originallyapproved
3
in1976.Lastpreviouseditionapprovedin2009asE570 - 09.DOI:10.1520/E0570- AvailablefromAmericanSocietyforNondestructiveTesting(ASNT),P.O.Box
15E01. 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Aerospace Industries Association of America, Inc., 1250 Eye
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM St., NW, Washington, DC 20005.
5
Standards volume information, refer to the standard’s Document Summary page on Available from International Organization for Standardization (ISO), 1, ch. de
the ASTM website. la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.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
---------------------- Page: 1 ----------------------
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E570 − 15
4.1.4 Each magnetic transducer in the flux sensor is con- E543 shall be identified in the purchase specification or
nected to an electronic console which amplifies, filters, an
...
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.
´1
Designation: E570 − 15 E570 − 15
Standard Practice for
Flux Leakage Examination of Ferromagnetic Steel Tubular
1
Products
This standard is issued under the fixed designation E570; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1
ε NOTE—Editorially corrected 10.1.1 in March 2016.
1. Scope*
1.1 This practice covers the application and standardization of equipment using the flux leakage test method for detection of
outer surface, inner surface, and subsurface discontinuities in ferromagnetic steel tubular products (Note 1) of uniform cross
section such as seamless and welded tubing.
NOTE 1—The term “tube” or “tubular product” will be used to refer to both pipe and tubing.
1
1.2 This practice is intended for use on tubular products having outside diameters from approximately ⁄2 to 24 in. (12.7 to 610
1
mm) with wall thicknesses to ⁄2 in. (12.7 mm). These techniques have been used for other sizes, however, and may be so specified
upon contractual agreement between the purchaser and the supplier.
1.3 This practice does not establish acceptance criteria; they must be specified by the using parties.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address 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.
2. Referenced Documents
2
2.1 ASTM Standards:
E543 Specification for Agencies Performing Nondestructive Testing
E1316 Terminology for Nondestructive Examinations
2.2 Other Documents:
3
SNT-TC-1A Recommended Practice for Personnel Qualification and Certification of Nondestructive Testing Personnel
3
ANSI/ASNT CP-189 ASNT Standard for Qualification and Certification of Nondestructive Testing Personnel
4
NAS-410 NAS Certification and Qualification of Nondestructive Personnel (Quality Assurance Committee)
5
ISO 9712 Non-destructive Testing—Qualification and Certification of NDT Personnel
3. Terminology
3.1 Definitions of terms relating to flux leakage examination are provided in Terminology E1316.
4. Summary of Practice
4.1 This method consists of the following steps:
4.1.1 The tube wall is magnetized at the area under examination to a proper level approaching magnetic saturation.
1
This practice is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.07 on Electromagnetic
Method.
Current edition approved June 1, 2015. Published July 2015. Originally approved in 1976. Last previous edition approved in 2009 as E570 - 09. DOI:
10.1520/E0570-15.10.1520/E0570-15E01.
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 Society for Nondestructive Testing (ASNT), P.O. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
4
Available from Aerospace Industries Association of America, Inc., 1250 Eye St., NW, Washington, DC 20005.
5
Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.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
---------------------- Page: 1 ----------------------
´1
E570 − 15
NOTE 2—Tubes subjected to magnetic inspections can retain various strengths and configuration of residual magnetic fields depending upon the
magnetization technique. If the residual field resulting from a given technique can interfere with subsequent applications of the tube, then a supplemental
demagnetization process may be required.
4.1.2 A flux sensor containing magnetic transducers is placed on or above the outside surface of the tube in the magne
...
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