Standard Specification for Silicone Liquid Used for Electrical Insulation

Data records

• The 2020 edition of ASTM D4652 was approved on 2020-11-01 and published in November 2020. Value: 2020. Source: ASTM D4652-20, clause Front matter. Verified 2026-10-24. Record std.astm-d4652.approved
• ASTM D4652-20 is the designation of the ASTM International specification for silicone liquid used for electrical insulation, the 2020 edition of ASTM D4652. Value: ASTM D4652-20. Source: ASTM D4652-20, clause Front matter. Verified 2026-10-24. Record std.astm-d4652.designation
• ASTM D4652-20 replaces the previous edition, which carried the designation ASTM D4652-05(2012). Value: 2020. Source: ASTM D4652-20, clause Front matter. Verified 2026-10-24. Record std.astm-d4652.revision-of
• ASTM D4652-20 specifies a silicone liquid for use as an insulating or cooling medium in transformers, capacitors and electronic assemblies. Source: ASTM D4652-20, clause 1.1. Verified 2026-10-24. Record std.astm-d4652.scope
• Clause 1.2 of ASTM D4652-20 limits the specification to a polydimethylsiloxane liquid of a stated nominal viscosity and a stated minimum fire point, and to new liquid only; a footnote to the clause points to IEEE C57.111 for the maintenance of silicone liquid in service. Source: ASTM D4652-20, clause 1.2. Verified 2026-10-24. Record std.astm-d4652.scope.fluid-class
• Clause 1.3 of ASTM D4652-20 states that the values in the specification are given in SI units only. Source: ASTM D4652-20, clause 1.3. Verified 2026-10-24. Record std.astm-d4652.scope.units
• ASTM D4652-20 is the responsibility of ASTM Committee D27 and its Subcommittee D27.02. Source: ASTM D4652-20, clause Front matter. Verified 2026-10-24. Record std.astm-d4652.sponsor
• Table 1 of ASTM D4652-20 addresses the chemical properties of the as-received liquid: neutralization number by ASTM D664 or ASTM D974, water content by ASTM D1533 with the modifications for silicone liquid that the table's footnote cites, and PCB content by ASTM D4059. Source: ASTM D4652-20, clause Table 1. Verified 2026-10-24. Record std.astm-d4652.structure.chemical-properties
• Clause 5.1 of ASTM D4652-20 requires the as-received liquid to meet every requirement of Table 1, and the specification refers the significance of those properties to ASTM D2225. Source: ASTM D4652-20, clause 5.1. Verified 2026-10-24. Record std.astm-d4652.structure.conformance
• Table 1 of ASTM D4652-20 addresses the dielectric properties of the as-received liquid: power-frequency dielectric breakdown with disk electrodes by ASTM D877 as modified for silicone liquid in ASTM D2225, power-frequency breakdown with VDE electrodes at two gap spacings by ASTM D1816, dissipation factor by ASTM D924, and resistivity by ASTM D1169. Source: ASTM D4652-20, clause Table 1. Verified 2026-10-24. Record std.astm-d4652.structure.dielectric-properties
• Table 1 of ASTM D4652-20 addresses the physical properties of the as-received liquid: color on the platinum-cobalt scale by ASTM D2129, flash point and fire point by ASTM D92, pour point by ASTM D97, refractive index by ASTM D1807, viscosity at four temperatures by ASTM D445, specific gravity by ASTM D1298, ASTM D1481 or ASTM D4052, and volatile matter by ASTM D4559. Source: ASTM D4652-20, clause Table 1. Verified 2026-10-24. Record std.astm-d4652.structure.physical-properties
• In Table 1 of ASTM D4652-20 the viscosity, refractive index and specific gravity requirements are each stated as a range with a lower and an upper bound, whereas the remaining properties carry a single minimum or maximum or a qualitative requirement. Source: ASTM D4652-20, clause Table 1. Verified 2026-10-24. Record std.astm-d4652.structure.range-requirements
• Clause 4.1 of ASTM D4652-20 directs sampling by ASTM D923 and clause 4.2 assigns each property the test method named in Table 1; the notes to clause 4 leave packaging, labeling and quality assurance to agreement between buyer and seller and recommend a functional evaluation of the liquid in the apparatus itself. Source: ASTM D4652-20, clause 4. Verified 2026-10-24. Record std.astm-d4652.structure.sampling-and-testing
• The licensed copy gives the full title of ASTM D4652-20 as Standard Specification for Silicone Liquid Used for Electrical Insulation. Value: Standard Specification for Silicone Liquid Used for Electrical Insulation. Source: ASTM D4652-20, clause Front matter. Verified 2026-10-24. Record std.astm-d4652.title