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ISO 4406:2021

Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles ISO 4406:2021

Publication date:   Jan 7, 2021

General information

90.93   Standard confirmed   Jun 29, 2026

ISO

ISO/TC 131/SC 6 Contamination control

International Standard

23.100.60   Filters, seals and contamination of fluids | 75.120   Hydraulic fluids

Buying

Published

Language in which you want to receive the document.

Scope

This document specifies the code to be used in defining the quantity of solid particles in the fluid used in a given hydraulic fluid power system.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4406:2017

NOW

PUBLISHED
ISO 4406:2021
90.93 Standard confirmed
Jun 29, 2026




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