ISO 28523:2009

INTERNATIONAL ISO
STANDARD 28523
First edition
2009-02-15
Ships and marine technology —
Lubricating and hydraulic oil systems —
Guidance for sampling to determine
cleanliness and particle contamination
Navires et technologie maritime — Les systèmes lubrifiant et
hydraulique de pétrole — Directives pour essais pour déterminer la
contamination de propreté et particule

Reference number
©
ISO 2009
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ii © ISO 2009 – All rights reserved

Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Dynamic sampling . 1
4 Static sampling . 3
5 Sample bottles . 4
6 Automatic particle counting . 5
Bibliography . 7

Foreword
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(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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ISO 28523 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 3, Piping and machinery.
iv © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 28523:2009(E)

Ships and marine technology — Lubricating and hydraulic oil
systems — Guidance for sampling to determine cleanliness and
particle contamination
1 Scope
This International Standard specifies methods for dynamic and static extraction of fluid samples from
lubricating and hydraulic oil systems.
A correct execution of the sampling is essential when analysing fluids from lubricating and hydraulic oil
systems.
In order to achieve reliable and comparable analysis results, the sampling must be performed under defined
conditions and operating environment.
When the system has reached its operating temperature, a representative sample is extracted from where the
fluid is in a turbulent flow condition. This method is called dynamic sampling. If this is not possible, the sample
can be extracted from the system tank. This method is called static sampling.
NOTE Particles > 20 µm settle quickly during static sampling.
This International Standard specifies methods for both dynamic and static sampling in connection with
collection in bottles.
For extraction of samples through a filtration kit for comparison with “master slides”, reference is made to the
manuals from the suppliers of such equipment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3722, Hydraulic fluid power — Fluid sample containers — Qualifying and controlling cleaning methods
ISO 4021, Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines
of an operating system
ISO 4406, Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles
3 Dynamic sampling
3.1 Rigging the sampling device
If it is possible to mount the sampling device on a section of the system pipe with a turbulent flow, a sampling
device as specified in Figure 1 is used.
If this is not possible, a turbulent flow can be achieved by inserting a T-pie
...