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ISO/DIS 4021

Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of an operating system

General information

Current stage: 40.60 Effective date: Jun 12, 2026

Originator: ISO

Owner: ISO/TC 131/SC 6

Type: International Standard

ICS: 23.100.60

Scope

The preferred method is to extract fluid samples from a main flowline in such a manner that the particulate contaminant in the sample is representative of the fluid flowing at the point of sampling. An alternative method is to extract a sample from the reservoir, but this method should only be used if a suitable sampler is not fitted.

ISO/DIS 4021

Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of an operating system

General information

Scope

Life cycle

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