ASTM D4293 Specification for Phosphate Ester Based Fluids for Turbine Lubrication
1. Scope
1.1 This specification covers the requirements for phosphate ester based fire resistant fluids for use in turbine lubrication.
1.2 The specification defines only unused fluid before it is installed in the turbine. It is not intended for fluids used in electrohydraulic control (EHC) systems.
1.3 The use of this type of fluid is restricted to turbine systems that have been designed or modified to accommodate phosphate ester lubricants.
1.4 The following precautionary caveat pertains only to Sections 5 and 5.3. 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D92 Test Method for Flash and Fire Points by Cleveland Open Cup
D97 Test Method for Pour Point of Petroleum Oils
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)
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
D974 Test Method for Acid and Base Number by Color-Indicator Titration
D1744 Test Method for Water in Liquid Petroleum Products by Karl Fischer Reagent
D2619 Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
2.2 Federal Test Method Standard:
791B, Method 5308 Corrosiveness and Oxidation Stability of Light Oils (Metal Strip)
2.3 SAE Specification:
SAE Aeronautical Material Specification (AMS) 3150C Hot Manifold and High Temperature Ignition Flammability Tests
3. Functional Property Requirements
3.1 Requirements for ISO viscosity grades 32 and 46 phosphate ester based fire resistant fluids are shown in Table 1.
3.2 The choice of viscosity grade for use in a particular turbine should comply with the turbine manufacturer's recommendation.
3.3 The autoignition temperature property for phosphate esters, although important to turbine manufacturers and to fluid users, is not listed because there is no published procedure in the ASTM manual.
