ASTM D1401-21
Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids

Standard No.

ASTM D1401-21

Release Date

2021

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D1401-21

Scope

1.1 This test method covers measurement of the ability of petroleum oils or synthetic fluids to separate from water. Although developed specifically for steam-turbine oils having viscosities of 28.8 mm2 /s to 90 mm2 /s at 40 °C, this test method may be used to test oils of other types having various viscosities and synthetic fluids at other test temperatures. It is recommended, however, that the test temperature be raised to 82 °C 6 1 °C when testing products more viscous than 90 mm2 /s at 40 °C. For higher viscosity oils where there is insufficient mixing of oil and water, Test Method D2711 is recommended. Other test temperatures such as 25 °C may also be used. A 1 % sodium choloride (NaCl) solution or synthetic seawater may be used in place of distilled water when testing certain oils or fuels used in marine applications. 1.2 When testing synthetic fluids whose relative densities are greater than that of water, the procedure is unchanged, but it should be noted that the water will probably float on the emulsion or liquid. 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 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 warning statements, see Section 7. 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.

ASTM D1401-21 Referenced Document

• ASTM D1141 Standard Practice for the Preparation of Substitute Ocean Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2711 Standard Test Method for Demulsibility Characteristics of Lubricating Oils
• ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
• ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants*， 2023-07-01 Update
• ASTM D665 Standard Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water

ASTM D1401-21 history

• 2021 ASTM D1401-21 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2019 ASTM D1401-19 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2018 ASTM D1401-18b Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2018 ASTM D1401-18a Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2018 ASTM D1401-18 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2012 ASTM D1401-12e1 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2012 ASTM D1401-12 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2010 ASTM D1401-10 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2009 ASTM D1401-09 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 2002 ASTM D1401-02 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• 1998 ASTM D1401-98 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids