ASTM D115 : 17(2024)

Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation

Standard Details

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, health, and environmental 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.