ASTM D115-17

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.
Designation: D115 − 14 D115 − 17
Standard Test Methods for Testing
1
Solvent Containing Varnishes Used for Electrical Insulation
This standard is issued under the fixed designation D115; 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.
1. Scope*
1.1 These test methods cover tests for solvent containing varnishes primarily intended to provide electrical, mechanical, and
chemical protection for electrical equipment. These test methods include tests for control and performance as follows:
Procedure Section
Build 38 – 42
Dielectric Strength 43 – 48
Drainage 26 – 32
Flash Point 18 – 20
Nonvolatile Matter 21 – 25
Oil Resistance 54 – 56
Preparation of Test Specimens 7
Specific Gravity 9 – 12
Temperature Index 49 – 50
Time of Drying 33 – 37
Varnish Compatibility 51 – 53
Viscosity 13 – 17
1.2 Where the entire test method is included in this standard, the precision and bias are not known unless given in the stated
method.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific hazard statements, see Section 5.
NOTE 1—There is no equivalent IEC standard.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D56 Test Method for Flash Point by Tag Closed Cup Tester
D93 Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
D287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
D295 Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation
D374 Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M
D580 Specification for Greige Woven Glass Tapes and Webbings
D1475 Test Method for Density of Liquid Coatings, Inks, and Related Products
D1932 Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
1
These test methods are under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and are the direct responsibility of Subcommittee
D09.01 on Electrical Insulating Varnishes, Powders and Encapsulating CompoundsProducts.
Current edition approved Nov. 1, 2014Nov. 1, 2017. Published November 2014November 2017. Originally approved in 1941. Last previous edition approved in 20122014
as D115 – 07 (2012).D115 – 14. DOI: 10.1520/D0115-14.10.1520/D0115-17.
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.
*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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D115 − 17
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D2518 Specification for Woven Glass Fabrics for Electrical Insulation (Withdrawn 2013)
D2519 Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test
D3145 Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
D3251 Test Method for Thermal Endurance Characteristics of Electrical Insulating Varnishes Applied Over Film-Insulated
Magnet Wire
D3278 Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus
D5032 Practice for Maintaining Constant Relative Humidity by Means of Aqueous
...

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: D115 − 17
Standard Test Methods for Testing
1
Solvent Containing Varnishes Used for Electrical Insulation
This standard is issued under the fixed designation D115; 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.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods cover tests for solvent containing
D56 Test Method for Flash Point by Tag Closed Cup Tester
varnishes primarily intended to provide electrical, mechanical,
D93 Test Methods for Flash Point by Pensky-Martens
and chemical protection for electrical equipment. These test
Closed Cup Tester
methods include tests for control and performance as follows:
D149 Test Method for Dielectric Breakdown Voltage and
Procedure Section
Dielectric Strength of Solid Electrical Insulating Materials
Build 38 – 42
Dielectric Strength 43 – 48
at Commercial Power Frequencies
Drainage 26 – 32
D202 Test Methods for Sampling and Testing Untreated
Flash Point 18 – 20
Paper Used for Electrical Insulation
Nonvolatile Matter 21 – 25
Oil Resistance 54 – 56
D287 Test Method for API Gravity of Crude Petroleum and
Preparation of Test Specimens 7
Petroleum Products (Hydrometer Method)
Specific Gravity 9 – 12
D295 Test Methods for Varnished Cotton Fabrics Used for
Temperature Index 49 – 50
Time of Drying 33 – 37
Electrical Insulation
Varnish Compatibility 51 – 53
D374 Test Methods for Thickness of Solid Electrical Insu-
Viscosity 13 – 17
lation (Metric) D0374_D0374M
1.2 Where the entire test method is included in this standard,
D580 Specification for Greige Woven Glass Tapes and
the precision and bias are not known unless given in the stated
Webbings
method.
D1475 Test Method for Density of Liquid Coatings, Inks,
and Related Products
1.3 The values stated in SI units are to be regarded as
D1932 Test Method for Thermal Endurance of Flexible
standard. The values given in parentheses are for information
Electrical Insulating Varnishes
only.
D2518 Specification for Woven Glass Fabrics for Electrical
3
1.4 This standard does not purport to address all of the
Insulation (Withdrawn 2013)
safety concerns, if any, associated with its use. It is the
D2519 Test Method for Bond Strength of Electrical Insulat-
responsibility of the user of this standard to establish appro-
ing Varnishes by the Helical Coil Test
priate safety, health, and environmental practices and deter-
D3145 Test Method for Thermal Endurance of Electrical
mine the applicability of regulatory limitations prior to use.
Insulating Varnishes by the Helical Coil Method
For specific hazard statements, see Section 5.
D3251 Test Method for Thermal Endurance Characteristics
of Electrical Insulating Varnishes Applied Over Film-
NOTE 1—There is no equivalent IEC standard.
Insulated Magnet Wire
1.5 This international standard was developed in accor-
D3278 Test Methods for Flash Point of Liquids by Small
dance with internationally recognized principles on standard-
Scale Closed-Cup Apparatus
ization established in the Decision on Principles for the
D3487 Specification for Mineral Insulating Oil Used in
Development of International Standards, Guides and Recom-
Electrical Apparatus
mendations issued by the World Trade Organization Technical
D5032 Practice for Maintaining Constant Relative Humidity
Barriers to Trade (TBT) Committee.
by Means of Aqueous Glycerin Solutions
1 2
These test 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 service@astm.org. For Annual Book of ASTM
Subcommittee D09.01 on Electrical Insulating Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 1, 2017. Published November 2017. Originally the ASTM website.
3
approved in 1941. Last previous edition approved in 2014 as D115 – 14. DOI: The last approved version of this historical standard is referenced on
10.1520/D0115-17. 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
1

---------------------- Page: 1 ----------------------
D115 − 17
D5423 Specification for Forced-Convection Laboratory Ov- 4.1.1 Specific gravity,
ens for Evaluation of Electrical Insulation 4.1.2 Viscosity,
E104 Practice for Maintaining Constant Relative Humidity 4.1.3 Flash point, and
by Means of Aqueous Solutions 4.1.4 Nonvolatile matter by weig
...