ASTM D7873-13(2017)

    Standard Test Method for Determination of Oxidation Stability and Insolubles Formation of Inhibited Turbine Oils at 120 °C Without the Inclusion of Water (Dry TOST Method)


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    1. Scope

    1.1 This test method is used to evaluate the sludging tendencies of steam and gas turbine lubricants during the oxidation process in the presence of oxygen and metal catalyst (copper and iron) at an elevated temperature. This test method may be used to evaluate industrial oils (for example, circulating oils and so forth).

    1.2 This test method is a modification of Test Method D4310 where the sludging and corrosion tendencies of the same kinds of oils are determined after 1000 h at 95 °C in the presence of water. Water is omitted in this modification.

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

    1.3.1 Exception—The values in parentheses in some of the figures are provided for information only for those using old equipment based on non-SI units.

    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.

    1.5 WARNING—Mercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPA’s website—http://www.epa.gov/mercury/faq.htm—for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law.

    1.6 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

    A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel (Metric)

    B1 Specification for Hard-Drawn Copper Wire

    D943 Test Method for Oxidation Characteristics of Inhibited Mineral Oils

    D1193 Specification for Reagent Water

    D2272 Test Method for Oxidation Stability of Steam Turbine Oils by Rotating Pressure Vessel

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4310 Test Method for Determination of Sludging and Corrosion Tendencies of Inhibited Mineral Oils

    E1 Specification for ASTMLiquid-in-Glass Thermometers

    E230/E230M Specification for Temperature-Electromotive Force (emf) Tables for Standardized Thermocouples


    ICS Code

    ICS Number Code 75.080 (Petroleum products in general); 75.100 (Lubricants, industrial oils and related products)

    UNSPSC Code

    UNSPSC Code 15121527(Turbine oil)


    Referencing This Standard
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    DOI: 10.1520/D7873-13R17

    Citation Format

    ASTM D7873-13(2017), Standard Test Method for Determination of Oxidation Stability and Insolubles Formation of Inhibited Turbine Oils at 120 °C Without the Inclusion of Water (Dry TOST Method), ASTM International, West Conshohocken, PA, 2017, www.astm.org

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