ASTM D4304-13 - 1.10.2013
 
1. Scope

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

 
2. Referenced Documents

D130-26

Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test

D445-26

Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

D665-25

Standard Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water

D943-25

Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils

D1401-21

Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids

D3427-26

Standard Test Method for Air Release Properties of Hydrocarbon Based Oils

D4052-22

Standard Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

D4057-22

Standard Practice for Manual Sampling of Petroleum and Petroleum Products

D7546-24

Standard Test Method for Determination of Moisture in New and In-Service Lubricating Oils and Additives by Relative Humidity Sensor

ISO 4406–99

Particle Count Analysis

D2272-22

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

D2422-24

Standard Classification of Industrial Fluid Lubricants by Viscosity System

D3339-21

Standard Test Method for Acid Number of Petroleum Products by Semi-Micro Color Indicator Titration

D4310-22a

Standard Test Method for Determination of Sludging and Corrosion Tendencies of Inhibited Mineral Oils (Includes all amendments and changes 11/10/2022).

D5182-26

Standard Test Method for Evaluating the Scuffing Load Capacity of Oils (FZG A/8.3/90 Method)

D664-24

Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration

D892-25

Standard Test Method for Foaming Characteristics of Lubricating Oils

D974-22

Standard Test Method for Acid and Base Number by Color-Indicator Titration

D1500-24

Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)

D6304-25

Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

D6439-23

Standard Guide for Cleaning, Flushing, and Purification of Steam, Gas, and Hydroelectric Turbine Lubrication Systems

D7155-20(2026)

Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils

D7547-26a

Standard Specification for Hydrocarbon Unleaded Aviation Gasoline (Includes all amendments and changes 5/11/2026).

D7647-24

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 Extinction

ISO?6072

Rubber--Compatibility Between Hydraulic Fluids and Standard Elastomeric Materials

ISO?8068

Lubricatns, Industrial Oils and Related Products (Class L)--Family T (Turbines)--Specification for Lubricating Turbines

D92-24

Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester

D97-17b(2022)

Standard Test Method for Pour Point of Petroleum Products (Includes all amendments and changes 11/29/2022).