ASTM D831 / D831M - 12(2020)

    Standard Test Method for Gas Content of Cable and Capacitor Oils

    Active Standard ASTM D831 / D831M | Developed by Subcommittee: D27.03

    Book of Standards Volume: 10.03

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    Significance and Use

    4.1 The gas content of cable and capacitor oils is considered to be important, since the evolution of gas in the form of bubbles can have an adverse effect on the insulating properties of these fluids. It is customary to degas these oils prior to use, and this test method provides a means of determining the gas content before and after degassing.

    1. Scope

    1.1 This test method covers the determination of the gas content of electrical insulating oils of low and medium viscosities in the general range up to 190 mm2/s at 104°F [40°C], such as are used in capacitors and paper-insulated electric cables and cable systems of the oil-filled type. The determination of gas content is desirable for any insulating oil having these properties and intended for use in a degassed state.

    Note 1: For testing insulating oils with viscosities of 19 mm2/s or below at 40°C, see Test Method D2945.

    1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

    1.3 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.

    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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D2945 Test Method for Gas Content of Insulating Oils

    ICS Code

    ICS Number Code 29.040.10 (Insulating oils)

    UNSPSC Code

    UNSPSC Code 15121505(Transformer oil or insulating oil); 32121500(Capacitors)

    Referencing This Standard
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    DOI: 10.1520/D0831_D0831M-12R20

    Citation Format

    ASTM D831 / D831M-12(2020), Standard Test Method for Gas Content of Cable and Capacitor Oils, ASTM International, West Conshohocken, PA, 2020,

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