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ISO 4263-2:2003

Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 2: Procedure for category HFC hydraulic fluids

Publication date:   Apr 25, 2003

General information

90.93   Standard confirmed   Mar 5, 2026

ISO

ISO/TC 28 Petroleum and related products, fuels and lubricants from natural or synthetic sources

International Standard

75.120   Hydraulic fluids

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Scope

ISO 4263-2:2003 specifies a method for the determination of the ageing behaviour of hydraulic fluids of category HFC as defined in ISO 6743-4 and specified in ISO 12922. The ageing is accelerated by the presence of oxygen, water and metal catalysts at elevated temperature, and the degradation of the fluid is followed by changes in pH value and insolubles content. Other parts of ISO 4263 specify similar procedures for the determination of the ageing behaviour of mineral oils and specified categories of fire-resistant fluids used in hydraulic and other applications.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4263:1986

NOW

PUBLISHED
ISO 4263-2:2003
90.93 Standard confirmed
Mar 5, 2026