ASTM E1033-98
(Practice)Standard Practice for Electromagnetic (Eddy-Current) Examination of Type F-Continuously Welded (CW) Ferromagnetic Pipe and Tubing Above the Curie Temperature
Standard Practice for Electromagnetic (Eddy-Current) Examination of Type F-Continuously Welded (CW) Ferromagnetic Pipe and Tubing Above the Curie Temperature
SCOPE
1.1 This practice covers a procedure for in-line, eddy-current examination of continuously welded (CW) ferromagnetic pipe and tubing at temperatures above the Curie temperature (approximately 1400°F (760°C), where the pipe is substantially nonmagnetic or austenitic.
1.2 This practice is intended for use on tubular products having nominal diameters of 1/2 in. (12.7 mm) to 4 in. (101.6 mm). These techniques may be used for larger- or smaller-diameter pipe and tubing as specified by the using parties.
1.3 This practice is specifically applicable to eddy-current examination using encircling coils, or probe coils.
1.4 This practice does not establish acceptance criteria. They must be established by the using parties.
1.5 The values stated in inch-pound units are to be regarded as standard. The SI units in parentheses may be approximate.
1.6 This standard does not purport to address the safety problems 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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Designation: E 1033 – 98
Standard Practice for
Electromagnetic (Eddy-Current) Examination of Type
F-Continuously Welded (CW) Ferromagnetic Pipe and
Tubing Above the Curie Temperature
This standard is issued under the fixed designation E 1033; 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 Certification of Nondestructive Testing Personnel
MIL-STD-410E Nondestructive Testing Personnel Qualifi-
1.1 This practice covers a procedure for in-line, eddy-
cation and Certification
current examination of continuously welded (CW) ferromag-
NAS-410 NAS Certification and Qualification of Nonde-
netic pipe and tubing at temperatures above the Curie tempera-
structive Personnel (Quality Assurance Committee)
ture (approximately 1400°F (760°C), where the pipe is
substantially nonmagnetic or austenitic.
3. Terminology
1.2 This practice is intended for use on tubular products
3.1 Standard terminology relating to electromagnetic ex-
having nominal diameters of ⁄2 in. (12.7 mm) to 4 in. (101.6
amination may be found in Terminology E 1316, Section C,
mm). These techniques may be used for larger- or smaller-
Electromagnetic Testing.
diameter pipe and tubing as specified by the using parties.
1.3 This practice is specifically applicable to eddy-current
4. Summary of Practice
examination using encircling coils, or probe coils.
4.1 In-line, automatic, eddy-current examination of CW
1.4 This practice does not establish acceptance criteria.
pipe utilizes probes or encircling coils, or both, mounted in the
They must be established by the using parties.
pass line to monitor the quality of pipe during production at
1.5 The values stated in inch-pound units are to be regarded
temperatures ranging from 1600 to 2200°F (870 to 1204°C).
as standard. The SI units in parentheses may be approximate.
4.2 Eddy-current instrumentation provides timely and use-
1.6 This standard does not purport to address the safety
ful information regarding the acceptability of CW pipe for
problems associated with its use. It is the responsibility of the
quality control purposes as well as for early warning that
user of this standard to establish appropriate safety and health
unacceptable pipe is being produced.
practices and determine the applicability of regulatory limita-
tions prior to use.
5. Significance and Use
5.1 The purpose of this practice is to outline a procedure for
2. Referenced Documents
the in-line eddy-current examination of hot CW pipe for the
2.1 ASTM Standards:
detection of major imperfections and repetitive discontinuities.
E 309 Practice for Eddy-Current Examination of Steel Tu-
5.2 A major advantage of in-line eddy-current examination
bular Products Using Magnetic Saturation
of ferromagnetic CW pipe above the Curie temperature lies in
E 543 Practice for Agencies Performing Nondestructive
the enhanced signal-to-noise ratio and depth of penetration
Testing
2 obtained without the use of magnetic saturation.
E 1316 Terminology for Nondestructive Examinations
5.3 The eddy-current method is capable of detecting and
2.2 Other Documents:
locating weld imperfections commonly referred to as open
SNT-TC-1A Recommended Practice for Personnel Qualifi-
3 welds, cave welds, black spots (weld inclusions), and partial
cation and Certification in Nondestructive Testing
welds (incomplete penetration). In addition, it will detect
ANSI/ASNT-CP-189 ASNT Standard for Qualification and
pipe-wall imperfections such as slivers, laps, and ring welds
(end welds).
5.4 The relative severity of the imperfections may be
This practice is under the jurisdiction of ASTM Committee E-7 on Nonde-
indicated by eddy-current signal amplitude or phase, or both.
structive Testing and is the direct responsibility of Subcommittee E07.07 on
Electromagnetic Methods.
Current edition approved Dec. 10, 1998. Published February 1999. Originally
published as E 1033 – 85. Last previous edition E 1033 – 91. Available from Standardization Documents Order Desk, Bldg. 4, Section D,
Annual Book of ASTM Standards, Vol 03.03. 100 Robbins Ave., Philadelphia, PA 19111–5904.
3 5
Available from American Society for Nondestructive Testing, 1711 Arlingate Available from Aerospace Industries Association of America, Inc., 1250 Eye
Plaza, PO Box 28518, Columbus, OH 43228–0518. Street, N.W., Washington, DC 20005.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E1033–98
An alarm level may be selected that utilizes signal amplitude or 8.1.1 The types and sizes of transducers employed are
phase, or both, for automatic recording or marking, or both. determined to a large degree by the coverage and resolution
required. Through precise transducer positioning, the geom-
5.5 Because the responses from natural discontinuities may
etries required for effective pipe inspection can be maintained.
vary significantly from those from artificial discontinuities,
care must be exercised in establishing test sensitivity and
8.1.2 The eddy-current transducers are cooled to maintain
acceptance criteria.
proper operating temperatures for test stability, and to avoid
thermal damage to the windings or the associated fixturing, or
6. Basis of Application
both.
8.1.3 The optimum response to the variables of interest (see
6.1 The following criteria may be specified in the purchase
5.3) can be obtained through the selection of the proper
specification, contractual agreement, or elsewhere, and may
instrumentation, transducer design, and operating frequency.
require agreement between the purchaser and the supplier.
Through signal processing, responses to variables of interest
6.1.1 The diameter, wall-thickness, and temperature of the
can be increased while those from such sources as scale
pipe being examined.
patches, cold spots, and mechanical vibration can be sup-
6.1.2 The extent of the examination.
pressed.
6.1.3 The time of examination: the point or points in the
8.1.4 Usually, the transducer assembly is placed at a loca-
manufacturing process where
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