ISO 8068-2024 PDF

Full title and description

St ISO 8068-2024 — Lubricants, industrial oils and related products (class L) — Family T (Turbines) — Specifications for lubricating oils for turbines. This international standard specifies minimum requirements for lubricants intended for the lubrication of most types of turbines used in power generation (steam, gas, single-shaft combined cycle with common lubrication systems and hydraulic turbines), and identifies lubricant types and performance considerations for turbine service.

Abstract

This standard defines minimum requirements for turbine lubricating oils as delivered, to be used in conjunction with ISO 6743-5. It covers mineral and synthetic lubricants (including esters and polyalphaolefins), environmentally acceptable fluids for hydraulic turbines, and fire‑resistant phosphate‑ester types. Wind‑turbine lubricants are excluded (see ISO 12925-1).

General information

• Status: Published.
• Publication date: April 2024 (2024-04).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.100 (Lubricants, industrial oils and related products).
• Edition / version: Edition 3 (2024).
• Number of pages: 19.

Scope

Specifies requirements for lubricants for a wide variety of turbines used in power generation (steam turbines, gas turbines, single‑shaft combined cycle turbines with common lubrication systems and hydraulic turbines). The document does not cover lubricants for wind turbines (those are addressed in ISO 12925-1). It is intended to be used together with ISO 6743-5 for classification and additional guidance.

Key topics and requirements

• Minimum physical and performance requirements for turbine lubricants (viscosity grades, oxidation stability, foaming, demulsibility, corrosion protection).
• Compatibility and suitability guidance for mineral oils (API groups I, II, II+, III, III+ including GTL-derived group III) and synthetic fluids (esters, polyalphaolefins).
• Recommendations for environmentally acceptable lubricants for hydraulic turbines and for fire‑resistant phosphate‑ester lubricants where applicable.
• Use together with ISO 6743-5 for lubricant classification and family/branch identification.
• Application boundaries and explicit exclusion of wind‑turbine lubricant requirements (reference to ISO 12925-1).

Typical use and users

Used by power‑plant engineers, turbine manufacturers, lubricant producers and formulators, procurement and specification writers, maintenance and reliability teams, and testing laboratories to select, specify and verify lubricants for turbines in power generation applications.

Related standards

ISO 6743-5 (lubricant classification and designation) — referenced for classification and supplementary guidance; ISO 12925-1 (lubricants for wind turbines) — excluded scope; previous editions/amendments of ISO 8068 (2006 and amendments) for historical comparison; documents and technical work from ISO/TC 28/SC 4.

Keywords

turbine lubricants, lubricating oil specifications, industrial oils, turbine oil, ISO 8068, ISO 6743-5, turbine maintenance, steam turbine oil, gas turbine oil, hydraulic turbine lubricant, ester, polyalphaolefin, phosphate ester.

FAQ

Q: What is this standard?

A: ISO 8068:2024 specifies minimum requirements and guidance for lubricating oils used in turbines for power generation (steam, gas, combined‑cycle and hydraulic turbines).

Q: What does it cover?

A: It covers types of lubricants (mineral and synthetic oils, esters, PAOs, environmentally acceptable fluids, phosphate‑ester fire‑resistant fluids), required performance characteristics and application guidance; it excludes wind‑turbine lubricants.

Q: Who typically uses it?

A: Turbine and power‑plant operators, lubricant manufacturers and formulators, maintenance engineers, procurement/specification teams and test laboratories.

Q: Is it current or superseded?

A: This is the current published edition (Edition 3, published April 2024). Earlier editions and amendments (for example the 2006 edition and subsequent amendments) have been superseded by this 2024 publication.

Q: Is it part of a series?

A: Yes — it is part of ISO’s series on lubricants, industrial oils and related products (class L), specifically Family T for turbines; it is intended to be used alongside classification standards such as ISO 6743-5.

Q: What are the key keywords?

A: Turbine oil, lubricating oils, industrial lubricants, turbine lubricant specifications, ester, polyalphaolefin, phosphate ester, ISO 8068, ISO 6743-5.