ASTM F1035-03
(Practice)Standard Practice for Use of Rubber-Cord Pie Disk to Demonstrate the Discernment Capability of a Tire X-ray Imaging System
Standard Practice for Use of Rubber-Cord Pie Disk to Demonstrate the Discernment Capability of a Tire X-ray Imaging System
SIGNIFICANCE AND USE
All X-ray systems are subject to changing efficiencies, so a practice for checking the overall operation is needed. This practice will assure the operator of an optimized image when ambient conditions are controlled and the X-ray high voltage generator is adjusted as prescribed.
The densities of some tire cord materials are very close to that of the rubber matrix in which they are enclosed, so the resolving capability of an X-ray system is critical to the detection of abnormalities. The rubber-cord pie disk provides a means for optimizing the resolving power in a particular apparatus and for comparing its performance over any period of time.
The rubber-cord pie disk can be used to compare the performances of X-ray systems in different laboratories. It can also be used in special cases to optimize system performance for a particular sector or cord-type, as may be required for examining a specific tire.
FIG. 2 Pie-Cord Disk Test Fixture
SCOPE
1.1 This practice describes the construction and use of a rubber-cord pie-shaped standard disk for demonstrating the discernment capability of an X-ray imaging system.
1.2 This practice is applicable to direct viewing (fluoroscopic) X-ray imaging systems and film, plate or paper (radiographic) X-ray imaging systems that are used for checking the construction consistency of pneumatic tires.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 This standard does not purport to address the safety concernss 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:F1035–03
Standard Practice for
Use of Rubber-Cord Pie Disk to Demonstrate the
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Discernment Capability of a Tire X-ray Imaging System
This standard is issued under the fixed designation F 1035; 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 3.1.2.1 Discussion—The centerline of the cone of radiation
from the X-ray tube is normal to the image plane. F 538
1.1 This practice describes the construction and use of a
3.1.3 X-ray imaging system, n—in tire testing, a collection
rubber-cord pie-shaped standard disk for demonstrating the
of the components and subsystems needed to produce a
discernment capability of an X-ray imaging system.
fluoroscopic or radiographic image of the tire.
1.2 This practice is applicable to direct viewing (fluoro-
3.1.3.1 Discussion—The collection includes the X-ray high
scopic) X-ray imaging systems and film, plate or paper
voltage generator, X-ray tube, and X-ray screen or radiograph.
(radiographic) X-ray imaging systems that are used for check-
F 538
ing the construction consistency of pneumatic tires.
3.1.4 X-ray radiograph, n—an X-ray film, plate, or paper
1.3 The values stated in SI units are to be regarded as the
that is placed at the image plane and is used for recording an
standard.
X-ray image of the object being examined. F 538
1.4 This standard does not purport to address the safety
3.1.5 X-ray screen, n—a fluorescent screen, placed at the
concernss associated with its use. It is the responsibility of the
image plane, that produces an X-ray image of the object being
user of this standard to establish appropriate safety and health
examined.
practices and determine the applicability of regulatory limita-
3.1.5.1 Discussion—Thisvisiblelightmaybephotographed
tions prior to use.
or input to a television system. F 538
2. Referenced Documents
4. Summary of Practice
2.1 ASTM Standards:
4.1 The pie disk is a rubber-cord composite that is used as
D 1349 Practice for Rubber—Standard Temperatures for
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the subject in an X-ray imaging system. Each of the six
Testing
sections of the disk has a different cord material which,
D 3186 Test Methods for Rubber—Evaluation of SBR
together, represent the cords commonly used in vehicle tires.
(Styrene-Butadiene Rubber) Mixed With Carbon Black or
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The X-ray absorption of these cords range from very nearly the
Carbon Black and Oil
same as that of the rubber matrix to quite different from it.
F 538 Terminology Relating to the Characteristics and Per-
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4.2 The rubber-cord pie disk shall be placed between the
formance of Tires
X-ray tube and the X-ray image plane at a specified distance
3. Terminology
from the image plane (see Fig. 1). The ambient conditions are
controlled or monitored, and recorded.
3.1 Definitions:
4.3 The image of the disk on a fluorescent screen or
3.1.1 pie disk, rubber-cord, n—in tire X-ray testing,a
photograph can be studied for clarity of detail for each cord
circular disk of a specified diameter having six pie-shaped
material. The voltage and current of the X-ray high voltage
sections, each containing cord of different materials; it is used
generator shall be adjusted for optimum detail and contrast
for demonstrating the discernment capability of an X-ray
sensitivity to view all cord materials simultaneously.
imaging system. (F 538)
3.1.2 X-ray image plane, n—in tire testing,asurfacelocated
5. Significance and Use
at a specified distance from the X-ray tube “focal spot.”
5.1 All X-ray systems are subject to changing efficiencies,
so a practice for checking the overall operation is needed. This
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This practice is under the jurisdiction ofASTM Committee F09 on Tires and is
practice will assure the operator of an optimized image when
the direct responsibility of Subcommittee F09.10 on Equipment, Facilities, and
ambient conditions are controlled and the X-ray high voltage
Calibration.
generator is adjusted as prescribed.
Current edition approved May 10, 2003. Published May 2003. Originally
e1
approved in 1986. Last previous edition approved in 1997 as F 1035 – 91 (1997) .
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Annual Book of ASTM Standards, Vol 09.01.
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Annual Book of ASTM Standards, Vol 09.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1035–03
FIG. 1 Pie-Cord Disk Test Fixture Positioning for Tire X-Ray System
FIG. 2 Pie-Cord Disk Test Fixture
5.2 The densities of some tire cord materials are very close for a particular sector or cord-type, as may be required for
to that of the rubber matrix in which they are encl
...
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