ISO 8068:2024
Lubricants, industrial oils and related products (class L)-Family T (Turbines)-Specifications for lubricating oils for turbines

Standard No.

ISO 8068:2024

Release Date

2024

Published By

International Organization for Standardization (ISO)

Latest

ISO 8068:2024

Scope

This document specifies the minimum requirements for lubricants for turbines, as delivered. It is intended to be used in conjunction with ISO 6743-5. This document specifies the requirements for a wide variety of lubricants for the lubrication of most types of turbines for power generation, including steam turbines, gas turbines, single shaft combined cycle turbines with common lubrication system and hydraulic turbines. This document does not specify the requirements for lubricants for wind turbines, which are covered in ISO 12925-1. The following lubricants are considered: 　——mineral oils, of either API groups I, II, II+, III, including group III from GTL (gas to liquid) process, and III+. Some API groups II and III are suitable for high temperature gas turbines; 　——synthetic lubricants, esters (API group V) and polyalphaolefins (API group IV), intended for high temperature gas turbines; 　——synthetic lubricants, esters (API group V) and polyalphaolefins (API group IV), environmentally acceptable for use in hydraulic turbines; 　——fire resistant phosphate-ester type lubricants.

ISO 8068:2024 Referenced Document

• DIN 51589-1 Determination of water separation ability of lubricating oils and low-flammability fluids after contact with steam
• EN 14832 Petroleum and related products - Determination of the oxidation stability and corrosivity of fire-resistant phosphate ester fluids
• EN 14833 Petroleum and related products - Determination of the hydrolytic stability of fire-resistant phosphate ester fluids
• EN 16807 Liquid petroleum products - Bio-lubricants - Criteria and requirements of bio-lubricants and bio-based lubricants
• EN 17181 Lubricants - Determination of aerobic biological degradation of fully formulated lubricants in an aqueous solution - Test method based on CO2-production
• ISO 12185 Crude petroleum, petroleum products and related products
• ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer titration method
• ISO 13226 Rubber - Standard reference elastomers (SREs) for characterizing the effect of liquids on vulcanized rubbers
• ISO 13357-1 Petroleum products — Determination of the filterability of lubricating oils — Part 1: Procedure for oils in the presence of water*， 2025-04-01 Update
• ISO 13357-2 Petroleum products — Determination of the filterability of lubricating oils — Part 2: Procedure for dry oils*， 2025-04-02 Update
• ISO 14593 Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Method by analysis of inorganic carbon in sealed vessels (CO<(Index)2> headspace test)
• ISO 14635-1 Gears — FZG test procedures — Part 1: FZG test method A/8,3/90 for relative scuffing load-carrying capacity of oils
• ISO 14669 Water quality - Determination of acute lethal toxicity to marine copepods (Copepoda, Crustacea)
• ISO 14935 Petroleum and related products — Determination of wick flame persistence of fire-resistant fluids
• ISO 1817 Rubber, vulcanized or thermoplastic
• ISO 2049 Petroleum products - Determination of colour (ASTM scale)
• ISO 20764 Petroleum and related products - Preparation of a test portion of high-boiling liquids for the determination of water content - Nitrogen purge method
• ISO 20823 Petroleum and related products - Determination of the flammability characteristics of fluids in contact with hot surfaces - Manifold ignition test
• ISO 2160 Petroleum products - Corrosiveness to copper - Copper strip test
• ISO 2592 Determination of flash and fire points — Cleveland open cup method
• ISO 2909 Petroleum products - Calculation of viscosity index from kinematic viscosity
• ISO 3016 Petroleum and related products from natural or synthetic sources — Determination of pour point
• ISO 3104 Petroleum products — Transparent and opaque liquids — Determination of kinematic viscosity and calculation of dynamic viscosity
• ISO 3170 Petroleum liquids - Manual sampling
• ISO 3448 Industrial liquid lubricants - ISO vicosity classification; Technical Corrigendum 1
• ISO 3675 Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method — Amendment 1
• ISO 4259-2 Petroleum and related products — Precision of measurement methods and results — Part 2: Interpretation and application of precision data in relation to methods of test AMENDMENT 1
• ISO 4263-1 Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids; TOST test - Part 1: Procedure for mineral oils
• ISO 4263-3 Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids using the TOST test - Part 3: Anhydrous procedure for synthetic hydraulic fluids
• ISO 4263-4 Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids - TOST test - Part 4: Procedure for industrial gear oils
• ISO 4406 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
• ISO 6247 Petroleum products - Determination of foaming characteristics of lubricating oils; Technical Corrigendum 1
• ISO 6296 Petroleum products - Determination of water - Potentiometric Karl Fischer titration method
• ISO 6341 Water quality - Determination of the inhibition of the mobility of Daphnia magna Straus (Cladocera, Crustacea) - Acute toxicity test
• ISO 6614 Petroleum products — Determination of water separability of petroleum oils and synthetic fluids — Amendment 1
• ISO 6618 Petroleum products and lubricants - Determination of acid or base number - Coulour-indicator titration method; Technical Corrigendum 1
• ISO 6743-5 Lubricants, industrial oils and related products (class L) - Classification - Part 5: Family T (Turbines)
• ISO 7120:1987 Petroleum products and lubricants; Petroleum oils and other fluids; Determination of rust-preventing characteristics in the presence of water
• ISO 7346-2 Water quality - Determination of the acute lethal toxicity of substances to a freshwater fish [Brachydanio rerio Hamilton-Buchanan (Teleostei, Cyprinidae)] - Part 2: Semi-static method
• ISO 760 Determination of water; Karl Fischer method (General method)
• ISO 8192 Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation
• ISO 9120 Petroleum and related products — Determination of air-release properties of steam turbine and other oils — Impinger method — Amendment 1
• ISO 9439 Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Carbon dioxide evolution test

ISO 8068:2024 history

• 2024 ISO 8068:2024 Lubricants, industrial oils and related products (class L)-Family T (Turbines)-Specifications for lubricating oils for turbines
• 2019 ISO 8068:2006/Amd 1:2019 Lubricants, industrial oils and related products (class L) — Family T (Turbines) — Specification for lubricating oils for turbines — Amendment 1: Filterability tests according to ISO 13357-1 and ISO 1
• 2006 ISO 8068:2006 Lubricants, industrial oils and related products (class L) - Family T (Turbines) - Specification for lubricating oils for turbines
• 1987 ISO 8068:1987 Petroleum products and lubricants; Petroleum lubricating oils for turbines (categories ISO-L-TSA and ISO-L-TGA); Specifications

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