ASTM D7155-20
Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils

Standard No.

ASTM D7155-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7155-20

Scope

1.1 This practice covers the compatibility of mixtures of turbine lubricating oils as defined by Specification D4304. The methods compare properties of specific mixtures with those of the neat oils after storage at specified conditions. 1.2 The methods are grouped into four tiers of testing types: 1.2.1 Tier 1—Visual appearance 1.2.2 Tier 2—Interfacial properties 1.2.3 Tier 3—Physical and chemical properties 1.2.4 Tier 4—Specific performance properties 1.3 The methods can be used to evaluate new (unused) lubricant compatibility or the effects of adding new (unused) lubricant to in-service lubricant in the system. 1.4 This practice does not evaluate the wear prevention characteristics, load carrying capacity, or the mechanical shear stability of lubricants mixtures while in service. If anti-wear (AW), extreme pressure (EP), or shear stability are to be evaluated, further testing of these parameters may be required. 1.5 Mixtures of the two constituent oils are evaluated using the Tier 1 and Tier 2 testing protocol. Sequential or concurrent testing is continued by applying tests from Tier 3 or Tier 4 until the test requestor or user is satisfied that the intent of this practice has been met. If any mixture fails the methods, the oils are considered incompatible by that method. If all mixtures pass the methods, the oils are considered compatible by those methods. It is recommended that passing only Tier 1 does not adequately test for fluid compatibility. 1.6 If the mixture passes Tier 1, it shows two oils are visually compatible only. If the mixture passes Tier 1 and 2, it shows two oils are visually and interfacially compatible. If the mixture passes Tier 1, 2 and 3, it shows two oils are visually, interfacially, physically, and chemically compatible. If the mixture passes Tier 1, 2, 3, 4, it shows two oils are compatible with the highest confidence level. Testing each tier level is giving the user more confidence that the two fluids are compatible. 1.7 This practice applies only to lubricating oils having characteristics suitable for evaluation by the suggested test methods. If the scope of a specific test method limits testing to those oils within a specified range of properties, oils outside that range cannot be tested for compatibility by that test method. 1.8 This practice may be used to evaluate the compatibility of different types and grades of oil. However, it is not intended to evaluate such mixtures for lubrication performance. The user is advised to consult with suppliers in these situations. 1.9 This practice does not purport to cover all test methods that could be employed. 1.10 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.11 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. 1.12 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 D7155-20 Referenced Document

• ASTM D130 Standard Test Method for Detection of Copper Corrosion from Petroleum Products by the Copper Strip Tarnish Test
• ASTM D1401 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids
• ASTM D1500 Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)
• ASTM D2270 Standard Practice for Calculating Viscosity Index From Kinematic Viscosity at 40 and 100176C
• ASTM D2272 Standard Test Method for Oxidation Stability of Steam Turbine Oils by Rotating Pressure Vessel
• ASTM D3120 Standard Test Method for Trace Quantities of Sulfur in Light Liquid Petroleum Hydrocarbons by Oxidative Microcoulometry
• ASTM D3427 Standard Test Method for Air Release Properties of Petroleum Oils
• ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants*， 2023-07-01 Update
• ASTM D4304 Standard Specification for Mineral Lubricating Oil Used in Steam or Gas Turbines
• ASTM D4310 Standard Test Method for Determination of the Sludging and Corrosion Tendencies of Inhibited Mineral Oils
• ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
• ASTM D4629 Standard Test Method for Trace Nitrogen in Liquid Petroleum Hydrocarbons by Syringe/Inlet Oxidative Combustion and Chemiluminescence Detection
• ASTM D5185 Standard Test Method for Determination of Additive Elements, Wear Metals, and Contaminants in Used Lubricating Oils and Determination of Selected Elements in Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
• ASTM D5762 Standard Test Method for Nitrogen in Petroleum and Petroleum Products by Boat-Inlet Chemiluminescence
• ASTM D5846 Standard Test Method for Universal Oxidation Test for Hydraulic and Turbine Oils Using the Universal Oxidation Test Apparatus
• ASTM D611 Standard Test Methods for Aniline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents
• ASTM D6186 Standard Test Method for Oxidation Induction Time of Lubricating Oils by Pressure Differential Scanning Calorimetry (PDSC)
• ASTM D6304 Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration*， 2020-12-01 Update
• ASTM D6514 Standard Test Method for High Temperature Universal Oxidation Test for Turbine Oils
• ASTM D664 Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
• ASTM D665 Standard Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water
• ASTM D7042 Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)*， 2021-11-01 Update
• ASTM D7843 Standard Test Method for Measurement of Lubricant Generated Insoluble Color Bodies in In-Service Turbine Oils using Membrane Patch Colorimetry*， 2021-04-01 Update
• ASTM D7873 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)*， 2022-11-01 Update
• ASTM D8148 Standard Test Method for Spectroscopic Determination of Haze in Fuels*， 2022-04-01 Update
• ASTM D892 Standard Test Method for Foaming Characteristics of Lubricating Oils
• ASTM D893 Standard Test Method for Insolubles In Used Lubricating Oils
• ASTM D974 Standard Test Method for Acid and Base Number by Color-Indicator Titration

ASTM D7155-20 history

• 2020 ASTM D7155-20 Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils
• 2018 ASTM D7155-18 Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils
• 2011 ASTM D7155-11 Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils
• 2006 ASTM D7155-06 Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils