This specification refers to polyalkylene glycol (PAG) lubricants used in steam and gas turbine lubrication systems where the performance requirements include control of foam, wear, corrosion and the creation of minimal deposits. This standard may also be applied to combined cycle turbine systems, where a single lubricant circulating system is used to supply lubricant to a steam and gas turbine configured in tandem either on a single or separate shaft for enhanced energy efficiency. This specification is intended to define the properties of polyalkylene glycol turbine lubricants that are functionally interchangeable with existing PAG based lubricants of this type, are compatible with most existing machinery components, and with appropriate field maintenance, will maintain their functional characteristics. This specification is intended to define only new PAG based lubricant before it is installed in the machinery. This specification is intended to be used as a guide. It is possible that other PAG based lubricants that do not meet this specification may perform satisfactorily in some turbines. This specification does not include API Group I, II, III and IV oils. This specification does not include the following the Group V fluids; polyol ester and phosphate ester based 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.
Keywordspolyalkylene glycol; PAG; polyglycol; combined cycle turbine oil; gas turbine oil; steam turbine oil; turbine lubricating systems; turbine lubricating oils; combined cycle turbine lubricant; gas turbine lubricant; steam turbine lubricant:
The use of PAG based turbine lubricants is increasing in gas and steam turbine systems. The chemistry of polyalkylene glycols is different from mineral oils and esters therefore the specifications and test methods may need to be different from that found in existing standards for turbine oils using other base stocks.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development