ASTM D902-12

Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation (Withdrawn 2020)

SIGNIFICANCE AND USE
The electrical properties of resin-coated glass fabrics are affected by their temperature and moisture content. For this reason it is necessary to control these properties for a specified time immediately prior to testing in order to attain reasonably good reproducibility of test values. The time of exposure to the conditioning atmosphere must be long enough to permit the test specimen to reach a relatively stable value. Usually the moisture content of these materials has little effect on the mechanical properties.
SCOPE
1.1 These test methods cover procedures for the testing of resin-coated glass fabrics and glass fabric tapes (Note 1) to be used as electrical insulation.
Note 1—Methods of testing varnished cloths and tapes are given in Methods D295.  
1.2 The warp threads in fabrics are the threads that are parallel with the length dimension as manufactured.
1.3 The procedures appear as follows:
Procedure
SectionASTM Test
Method Reference Breaking Strength22-28D828 Conditioning 6-8... Dielectric Breakdown Voltage and Di-
electric Strength29-38D149, D295 Dissipation Factor and Relative Permit-
tivity52-60D150, E104, D5032 Effect of Elevated Temperature39-45D1830 Resistance to Oil46-51D3487 Sampling 3-5... Thermal Endurance68 D1830 Thickness16-21D374 Thread Count12-15... Weight 9-11... Weight Loss at Elevated Temperature61-67 D5423
1.4 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.  
1.5 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. Specific warning statement are given in 35.1.1 and 58.1.
WITHDRAWN RATIONALE
These test methods cover procedures for the testing of resin-coated glass fabrics and glass fabric tapes to be used as electrical insulation.
Formerly under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, these test methods were withdrawn in March 2020. This standard is being withdrawn without replacement because it is no longer being maintained.

General Information

• Status: Withdrawn
• Publication Date: 31-Mar-2012
• Withdrawal Date: 08-Mar-2020
• ICS: 29.035.30 - Glass and ceramic insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Relations

• Referred By: ASTM D4969-17(2022) - Standard Specification for Polytetrafluoroethylene–(PTFE) Coated Glass Fabric
• Effective Date: 01-Apr-2012

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: D902 − 12
Standard Test Methods for
Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes
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Used for Electrical Insulation
This standard is issued under the fixed designation D902; 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. Scope* bility of regulatory limitations prior to use. Specific warning
statement are given in 35.1.1 and 58.1.
1.1 These test methods cover procedures for the testing of
resin-coated glass fabrics and glass fabric tapes (Note 1)tobe
2. Referenced Documents
used as electrical insulation.
2
2.1 ASTM Standards:
NOTE 1—Methods of testing varnished cloths and tapes are given in
D149 Test Method for Dielectric Breakdown Voltage and
Methods D295.
Dielectric Strength of Solid Electrical Insulating Materials
1.2 The warp threads in fabrics are the threads that are
at Commercial Power Frequencies
parallel with the length dimension as manufactured.
D150 Test Methods forAC Loss Characteristics and Permit-
1.3 The procedures appear as follows: tivity (Dielectric Constant) of Solid Electrical Insulation
D295 Test Methods for Varnished Cotton Fabrics Used for
ASTM Test
Procedure Section Method Reference
Electrical Insulation
Breaking Strength 22 – 28 D828
D374 Test Methods for Thickness of Solid Electrical Insu-
Conditioning 6–8 .
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lation (Withdrawn 2013)
Dielectric Breakdown Voltage and Di- 29 – 38 D149, D295
electric Strength
D828 Test Method for Tensile Properties of Paper and
Dissipation Factor and Relative Permit- 52 – 60 D150, E104,
PaperboardUsingConstant-Rate-of-ElongationApparatus
tivity D5032
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Effect of Elevated Temperature 39 – 45 D1830 (Withdrawn 2009)
Resistance to Oil 46 – 51 D3487
D1711 Terminology Relating to Electrical Insulation
Sampling 3–5 .
D1830 Test Method for Thermal Endurance of Flexible
Thermal Endurance 68 D1830
Sheet Materials Used for Electrical Insulation by the
Thickness 16 – 21 D374
Thread Count 12–15 .
Curved Electrode Method
Weight 9–11 .
D3487 Specification for Mineral Insulating Oil Used in
Weight Loss at Elevated Temperature 61 – 67 D5423
Electrical Apparatus
1.4 The values stated in inch-pound units are to be regarded
D5032 Practice for Maintaining Constant Relative Humidity
as the standard. The values in parentheses are for information
by Means of Aqueous Glycerin Solutions
only.
D5423 Specification for Forced-Convection Laboratory Ov-
1.5 This standard does not purport to address all of the
ens for Evaluation of Electrical Insulation
safety concerns, if any, associated with its use. It is the
E104 Practice for Maintaining Constant Relative Humidity
responsibility of the user of this standard to establish appro-
by Means of Aqueous Solutions
priate safety and health practices and determine the applica-
1 2
These methods are under the jurisdiction of ASTM Committee D09 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical and Electronic Insulating Materials and are the direct responsibility of contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Subcommittee D09.07 on Flexible and Rigid Insulating Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2012. Published April 2012. Originally the ASTM website.
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approved in 1946. Last previous edition approved in 2006 as D902 – 06. DOI: The last approved version of this historical standard is referenced on
10.1520/D0902-12. www.astm.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
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D902 − 12
2.2 IEEE Standard: or 8.1.3. In matters of dispute, consider 8.1.2 the referee
IEEE No. 1 General Principles forTemperature Limits in the method. Use the method described in 8.1.3 only if specifically
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Rating of Electrical Equipment agreed upon by the producer and consumer.
8.1.1 Condition the test specimen for 48 h in the Standard
SAMPLING
Laboratory Atmosphere (50 6 2 % relative humidity at a
temperatureof23 61°C(73.4 61.8°F)),andconductthetests
3. Selecting Sample Rolls
in the Standard Laboratory Atmosphere.
3.1 Sampleshipmentsofresin-coatedglassfabricsandglass
8.1.2 Condition the test specimen for 48 h in the Standard
fabric tapes as specified in 3.2 and 3.3. Select the rolls or pads
Laboratory Atmosphere (50 6 2 % relative humidity at a
in such a manner as to be representative of the sh
...