ASTM D4652-20

ASTM D4652-20 - 1.11.2020

1. Scope

1.1 This specification covers silicone liquid for use in transformers, capacitors, and electronic assemblies as an insulating or cooling medium, or both.

1.2 Silicone liquid covered by this specification is polydimethylsiloxane having a nominal viscosity of 50 mm²/s at 25°C and a fire point of 340°C or greater. This specification applies only to new silicone liquid. Information on in-service maintenance testing is available in appropriate guides.2

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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

D1816-12(2019)	Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using VDE Electrodes
D1169-19a	Standard Test Method for Specific Resistance (Resistivity) of Electrical Insulating Liquids (Includes all amendments and changes 10/10/2019).
D974-22	Standard Test Method for Acid and Base Number by Color-Indicator Titration
D924-23	Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids
D923-15(2023)	Standard Practices for Sampling Electrical Insulating Liquids
D877-02	Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes
D664-18e2	Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration (Includes all amendments and changes 1/4/2019).
D445-23	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D97-17b(2022)	Standard Test Method for Pour Point of Petroleum Products (Includes all amendments and changes 11/29/2022).
D4559-99	Standard Test Method for Volatile Matter in Silicone Fluid
D4059-00(2018)	Standard Test Method for Analysis of Polychlorinated Biphenyls in Insulating Liquids by Gas Chromatography
D4052-22	Standard Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
D2864-21a	Standard Terminology Relating to Electrical Insulating Liquids and Gases (Includes all amendments and changes 12/14/2021).
D2225-20	Standard Test Methods for Silicone Liquids Used for Electrical Insulation
D2161-20	Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity
D2129-17	Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
D1298-12b(2017)e1	Standard Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method (Includes all amendments and changes 3/14/2023).
D1807-00	Standard Test Methods for Refractive Index and Specific Optical Dispersion of Electrical Insulating Liquids
D1533-20	Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration
D92-18	Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester
D1481-17	Standard Test Method for Density and Relative Density (Specific Gravity) of Viscous Materials by Lipkin Bicapillary Pycnometer (Withdrawn 2023)