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ASTM D4166-99(2004)e1

(Test Method)

Standard Test Method for Measurement of Thickness of Nonmagnetic Materials by Means of a Digital Magnetic Intensity Instrument (Withdrwan 2008)

Standard Test Method for Measurement of Thickness of Nonmagnetic Materials by Means of a Digital Magnetic Intensity Instrument (Withdrwan 2008)

SIGNIFICANCE AND USE
This test method is useful for measuring the wall thickness of plastic vessels and other plastic structures where the geometry of the equipment does not permit direct measurement by conventional methods, such as micrometers, calipers, and rulers. This test method is not limited to plastics and can be used for all nonmagnetic materials. It provides for a rapid and accurate thickness measurement, without the need for drilling and repair of holes.  
Accuracies are not affected by density variations, permitting the measurement of composites made up of a variety of materials of varying densities. By placement of the magnetic source on the mold surface, thickness measurements can be made during and after fabrication of plastic products to verify thickness and adherence to specifications.
SCOPE
1.1 This test method covers the measurement of thickness of any nonmagnetic material by means of a digital magnetic intensity instrument.Note 1
The instrument on which this test method is based is no longer sold or serviced.
1.2 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.
1.2 There is no similar or equivalent ISO standard.
WITHDRAWN RATIONALE
Formerly under the jurisdiction of Committee D20 on Plastics, this test method was withdrawn in August 2008. This devise is no longer manufactured nor are existing devises capable of being serviced.

General Information

Status
Withdrawn
Publication Date
30-Sep-2004
Withdrawal Date
17-Aug-2008
ICS
17.040.20 - Properties of surfaces
Technical Committee
D20 - Plastics
Drafting Committee
D20.23 - Reinforced Thermosetting Resin Piping Systems and Chemical Equipment
Current Stage
Ref Project

Relations

Replaces
ASTM D4166-99 - Standard Test Method for Measurement of Thickness of Nonmagnetic Materials by Means of a Digital Magnetic Intensity Instrument
Effective Date
01-Oct-2004
Referred By
ASTM D3567-17(2022) - Standard Practice for Determining Dimensions of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and Fittings
Effective Date
01-Oct-2004

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ASTM D4166-99(2004)e1 - Standard Test Method for Measurement of Thickness of Nonmagnetic Materials by Means of a Digital Magnetic Intensity Instrument (Withdrwan 2008)ASTM D4166-99(2004)e1 - Standard Test Method for Measurement of Thickness of Nonmagnetic Materials by Means of a Digital Magnetic Intensity Instrument (Withdrwan 2008)
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ASTM D4166-99(2004)e1 - Standard Test Method for Measurement of Thickness of Nonmagnetic Materials by Means of a Digital Magnetic Intensity Instrument (Withdrwan 2008)
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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
An American National Standard
e1
Designation:D 4166–99 (Reapproved 2004)
Standard Test Method for
Measurement of Thickness of Nonmagnetic Materials by
Means of a Digital Magnetic Intensity Instrument
This standard is issued under the fixed designation D 4166; 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.
e NOTE—Note 1 was added and footnote 2 was editorially corrected.
1. Scope* made during and after fabrication of plastic products to verify
thickness and adherence to specifications.
1.1 Thistestmethodcoversthemeasurementofthicknessof
any nonmagnetic material by means of a digital magnetic
4. Interferences
intensity instrument.
4.1 Any instrument measuring the intensity of a magnetic
NOTE 1—The instrument on which this test method is based is no
field can sometimes be influenced by a strong artificial or
longer sold or serviced.
natural magnetic field.
1.2 This standard does not purport to address all of the
4.2 Any magnetic material located in the space between the
safety concerns, if any, associated with its use. It is the
magnet and the sensor will distort the measurement.
responsibility of the user of this standard to establish appro-
4.3 Amajor temperature change (+10°F, +5.6°C) will cause
priate safety and health practices and determine the applica-
a slight drift in calibration, requiring a recalibration at the new
bility of regulatory limitations prior to use.
temperature prior to making the measurement.
1.3 There is no similar or equivalent ISO standard.
5. Apparatus
2. Summary of Test Method 2
5.1 Micro Digital Magnetic Thickness Sensor .
2.1 In this test method, a magnetic sensing device is
6. Sampling
calibrated and placed on one side of the material to be
measured. A magnet of known intensity is placed on the
6.1 Two separate measurements at each location shall be
opposite side and the distance between the magnet and the
taken. If a variation in excess of 0.01 in. (0.25 mm) appears, a
magnetic sensing device shows as a digit that can be converted third measurement shall be taken.
to inch-pound or metric units by reference to a table.
7. Procedure
3. Significance and Use
7.1 Calibration—Calibrate the magnetic sensing device as
3.1 This test method is useful for measuring the wall
follows:
thickness of plastic vessels and other plastic structures where 7.1.1 Center the magnet supplied with the apparatus on the
the geometry of the equipment does not permit direct measure-
end of the sensor head and depress the “set’’ button. This
ment by conventional methods, such as micrometers, calipers, establishes the zero measurement point.
and rulers.This test method is not limited to plastics and can be
7.2 Measurement:
used for all nonmagnetic materials. It provides for a rapid and 7.2.1 Place the magnet used in the calibration procedure
accurate thickness measurement, without the need for drilling
(7.1) on one side of the material to be measured.
and repair of holes. 7.2.2 Place the magnetic sensing device on the opposite side
3.2 Accuracies are not affected by density variations, per-
and move it in a criss-cross motion until the digit reaches its
mitting the measurement of composites made up of a variety of lowest point. This denotes that the magnetic sensing device is
materials of varying
...

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5.2 It is also important that automotive finishes and other high-gloss nonmetallic surfaces possess the desired finished appearance. The present method identifies by measurements important aspects of finishes. Those having identical sets of numbers normally have the same gloss characteristics. It usually requires more than one measurement to identify properly the glossy appearance of any finish (see Refs 3 and 4).
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1.2 As originally developed by Tingle and others (see Refs 1 and 2),2 the test methods were applied only to bright metals. Recently they have been applied to high-gloss automotive finishes and other nonmetallic surfaces.  
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4.1 Measurement of the thickness of a coating is essential to assessing its utility and cost.  
4.2 The coulometric method destroys the coating over a very small (about 0.1 cm2) test area. Therefore its use is limited to applications where a bare spot at the test area is acceptable or the test piece may be destroyed.
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SCOPE
1.1 This terminology standard defines terms used in the description of appearance, including but not limited to color, gloss, opacity, scattering, texture, and visibility of both materials (ordinary, fluorescent, retroreflective) and light sources (including visual display units).  
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