1.1 This specification covers mineral and synthetic (API group I, II, III, or IV) oils used in steam and gas turbine lubrication systems where the performance requirements demand highly refined mineral or synthetic base oils compounded with rust and oxidation inhibitors plus selected additives as needed to control foam, wear, demulsibility, and so forth. This standard may also be applied to “combined cycle” turbine systems, where a single lubricant circulating system is used to supply oil to a steam and gas turbine configured in tandem either on a single or separate shaft for enhanced energy efficiency.
1.2 This specification is intended to define the properties of mineral and synthetic oil-based turbine lubricating oils that are functionally interchangeable with existing oils of this type, are compatible with most existing machinery components, and with appropriate field maintenance, will maintain their functional characteristics.
1.3 This specification is intended to define only new lubricating oil before it is installed in the machinery.
1.4 This specification is intended to be used as a guide. It is possible that oils that do not meet this specification may perform satisfactorily in some turbines.
1.5 This specification does not include API Group V fluids. For polyol ester fluids used to lubricate land-based gas turbines, the user is referred to the current version of military specification MIL-PRF-23699 for fluid performance requirements. For phosphate ester fluids used as turbine lubricants or steam turbine electro-hydraulic control (EHC) fluids, the user is referred to the current version of Specification D4293 for fluid performance requirements.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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 D4304-17 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 D2272 Standard Test Method for Oxidation Stability of Steam Turbine Oils by Rotating Pressure Vessel
ASTM D2422 Standard Classification of Industrial Fluid Lubricants by Viscosity System*, 2018-10-01 Update
ASTM D3339 Standard Test Method for Acid Number of Petroleum Products by Semi-Micro Color Indicator Titration
ASTM D3427 Standard Test Method for Air Release Properties of Petroleum Oils
ASTM D4052 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter
ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
ASTM D4293 Standard Specification for Phosphate Ester Based Fluids for Turbine Lubrication
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 D5182 Standard Test Method for Evaluating the Scuffing Load Capacity of Oils (FZG Visual Method)
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 D6439 Standard Guide for Cleaning, Flushing, and Purification of Steam, Gas, and Hydroelectric Turbine Lubrication Systems
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 D7155 Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils*, 2020-05-01 Update
ASTM D7546 Standard Test Method for Determination of Moisture in New and In-Service Lubricating Oils and Additives by Relative Humidity Sensor*, 2024-02-01 Update
ASTM D7547 Standard Specification for Hydrocarbon Unleaded Aviation Gasoline*, 2023-05-01 Update
ASTM D7647 Standard Test Method for Automatic Particle Counting of Lubricating and Hydraulic Fluids Using Dilution Techniques to Eliminate the Contribution of Water and Interfering Soft Particles by Light Extinc*, 2024-02-01 Update
ASTM D892 Standard Test Method for Foaming Characteristics of Lubricating Oils
ASTM D92 Standard Test Method for Flash and Fire Points by Cleveland Open Cup
ASTM D943 Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils
ASTM D97 Standard Test Method for Pour Point of Petroleum Products
ASTM D974 Standard Test Method for Acid and Base Number by Color-Indicator Titration
ISO 6072 Rubber - Compatibility between hydraulic fluids and standard elastomeric materials
ISO 8068 Lubricants, industrial oils and related products (class L) — Family T (Turbines) — Specification for lubricating oils for turbines — Amendment 1: Filterability tests according to ISO 13357-1 and ISO 1*, 2019-03-04 Update
ASTM D4304-17 history
2022ASTM D4304-22 Standard Specification for Mineral and Synthetic Lubricating Oil Used in Steam or Gas Turbines
2017ASTM D4304-17 Standard Specification for Mineral and Synthetic Lubricating Oil Used in Steam or Gas Turbines
2013ASTM D4304-13 Standard Specification for Mineral and Synthetic Lubricating Oil Used in Steam or Gas Turbines
2006ASTM D4304-06a Standard Specification for Mineral Lubricating Oil Used in Steam or Gas Turbines
2006ASTM D4304-06 Standard Specification for Mineral Lubricating Oil Used in Steam or Gas Turbines
2000ASTM D4304-00 Standard Specification for Mineral Lubricating Oil Used in Steam or Gas Turbines
1999ASTM D4304-99 Standard Specification for Mineral Lubricating Oil Used in Steam or Gas Turbines