RS ISO 8068: 2006
Lubricants, industrial oils and related products (class L) — Family T (Turbines) — Specification for lubricating oils for turbines


This International Standard specifies the minimum requirements for turbine lubricants, as delivered. It
specifies the requirements for a wide variety of turbines for power generation, including steam turbines, gas
turbines, combined-cycle turbines with a common lubrication system and hydraulic (water driven) turbines.
This International Standard does not specify the requirements for wind turbines, which are dealt with in
ISO 12925-1[4].
Whilst power generation is the primary application for turbines, steam and gas turbines can also be used to
drive rotating equipment, such as pumps and compressors. The lubrication systems of these driven loads can
be common to that of the turbine.
Turbine installations incorporate complex auxiliary systems requiring lubrication, including hydraulic systems,
gearboxes and couplings. Depending upon the design and configuration of the turbine and driven equipment,
turbine lubricants can also be used in these auxiliary systems.
This International Standard should be read in conjunction with ISO 6743-5[2], the classification of different
turbine lubricant types.
The following lubricants are considered in this International Standard:
? mineral oils;
? synthetic lubricants, ester and polyalphaolefin types intended for high-temperature gas turbines;
? synthetic lubricants, ester and polyalphaolefin types, environmentally acceptable for use in hydraulic
? fire-resistant phosphate-ester type lubricants.
NOTE For the purposes of this International Standard, the term “% (m/m)” is used to represent the mass fraction.

General Information

RS ISO 8068: 2006ADOPTED ISO STANDARDSChemical technology25Second Edition
Oct 2022
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