Abstract

This specification covers mineral lubricating oils used in steam and gas turbine lubricating systems where the performance requirements demand a highly refined mineral base oil compounded with rust and oxidation inhibitors plus selected additives as needed to control foam, wear, demulsibility, and so forth. This specification is intended to define the properties of new mineral 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. The lubricating oils shall meet the functional property limits specified for each type, as follows: ISO-viscosity grade; ASTM color; specific gravity, flash point, and pour point; water content and viscosity; visual examination; total acid number; emulsion characteristics; foaming characteristics; air release; rust preventing characteristics; copper corrosion; oxidation stability; 1000-h TOST sludge and total acid number; and cleanliness at the delivery stage.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers mineral oils used in steam and gas turbine lubrication systems where the performance requirements demand a highly refined mineral base oil 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 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.

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

D92 Test Method for Flash and Fire Points by Cleveland Open Cup Tester

D97 Test Method for Pour Point of Petroleum Products

D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test

D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration

D665 Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water

D892 Test Method for Foaming Characteristics of Lubricating Oils

D943 Test Method for Oxidation Characteristics of Inhibited Mineral Oils

D974 Test Method for Acid and Base Number by Color-Indicator Titration

D1401 Test Method for Water Separability of Petroleum Oils and Synthetic Fluids

D1500 Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)

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

D2422 Classification of Industrial Fluid Lubricants by Viscosity System

D3339 Test Method for Acid Number of Petroleum Products by Semi-Micro Color Indicator Titration

D3427 Test Method for Air Release Properties of Petroleum Oils

D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

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

D5182 Test Method for Evaluating the Scuffing Load Capacity of Oils (FZG Visual Method)

D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

ISO Standards

Keywords

combined cycle turbine oil; gas turbine oil; mineral oil; R and O oils; steam turbine oil; turbine lubricating oils; turbine lubrication systems;

ICS Code

ICS Number Code 75.100 (Lubricants, industrial oils and related products)

DOI: 10.1520/D4304-06A

ASTM International is a member of CrossRef.

ASTM D4304