Hydraulic fluid power — Hose and hose assemblies — Method of collecting a fluid sample for analyzing the cleanliness of a hose or hose assembly

ISO/TS 18409:2018 specifies two methods for collecting a fluid sample to be used to analyse the cleanliness of hydraulic fluid power hoses or hose assemblies within a certain inside diameter and length range (this range includes the majority of hose assemblies of real fluid power applications). The two methods described in this document are intended for collecting only solid particulate contamination; they may not be appropriate for collecting contamination in liquid or grease form. ISO/TS 18409:2018 is a specific application of ISO 18413:2015, specifically Annexes A and B. The scope of ISO/TS 18409:2018 does not include providing efficient and effective cleaning methods for hose assemblies. These methods are recommended for statistical validation of other hose cleaning methods, which are more suitable for systematic processing of large production batches. Contamination analysis is excluded from the scope of this document.

Transmissions hydrauliques — Flexibles et flexibles de raccordement — Méthode de collecte d'échantillon de fluide pour l'évaluation de la propreté de flexibles ou flexibles de raccordement

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Status
Published
Publication Date
16-Apr-2018
Current Stage
9093 - International Standard confirmed
Start Date
02-Nov-2021
Completion Date
02-Nov-2021
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ISO/TS 18409:2018 - Hydraulic fluid power -- Hose and hose assemblies -- Method of collecting a fluid sample for analyzing the cleanliness of a hose or hose assembly
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TECHNICAL ISO/TS
SPECIFICATION 18409
First edition
2018-04
Hydraulic fluid power — Hose
and hose assemblies — Method of
collecting a fluid sample for analyzing
the cleanliness of a hose or hose
assembly
Transmissions hydrauliques — Flexibles et flexibles de raccordement
— Méthode de collecte d'échantillon de fluide pour l'évaluation de la
propreté de flexibles ou flexibles de raccordement
Reference number
ISO/TS 18409:2018(E)
ISO 2018
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ISO/TS 18409:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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Published in Switzerland
ii © ISO 2018 – All rights reserved
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ISO/TS 18409:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Test equipment....................................................................................................................................................................................................... 2

5 Contaminant collection methods ........................................................................................................................................................ 3

5.1 General ........................................................................................................................................................................................................... 3

5.2 Procedure for collecting a sample using the agitation (“slosh”) method ............................................. 4

5.3 Procedure for collecting a sample using the quick rinse method ............................................................... 5

6 Identification statement (reference to this document) ............................................................................................... 6

Annex A (informative) Choice of the contaminant collection method ............................................................................... 7

Annex B (normative) Determination of the controlled volume and controlled surface.................................8

Annex C (normative) Agitation (slosh) method — Instructions on filling and rotating the

test item, and collecting the test liquid ......................................................................................................................................... 9

Annex D (normative) Requirements for the dispensing system for quick rinse method ...........................11

Bibliography .............................................................................................................................................................................................................................13

© ISO 2018 – All rights reserved iii
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ISO/TS 18409:2018(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee

SC 4, Connectors and similar products and components.
iv © ISO 2018 – All rights reserved
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ISO/TS 18409:2018(E)
Introduction

In hydraulic fluid power systems, power is transmitted and controlled through a pressurized liquid

within a circuit where piping allows the fluid to flow between components. Part of the piping may

consist of hose assemblies, usually manufactured by assembling a length of hose, cut out from a hose

coil, with specific connectors at its ends.

One of the functions of the hydraulic liquid in a system is to separate and lubricate the moving parts

of components. The presence of solid particles produces wear, resulting in loss of efficiency, reduced

component life and subsequent unreliability. Thus, hydraulic liquid cleanliness is very important for the

system’s uninterrupted operation and long life.

The amount of solid contamination present in a hydraulic system at start-up has a great influence on

reliability during initial operation and subsequent component life. Components should be cleaned to an

appropriate level after manufacturing and prior to use.

Hose assemblies are potential sources of contamination because of the bulk hose manufacturing

processes, which can be intrinsically dirty, and because of other contaminants coming from assembly

operations (hose cutting, dirty connectors, etc.) and/or storage.

It may be required to assess the actual built-in solid contamination of hose assemblies before installation

(e.g. ISO 4413: 2010, 5.4.6.4, in general requirements for piping).
© ISO 2018 – All rights reserved v
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TECHNICAL SPECIFICATION ISO/TS 18409:2018(E)
Hydraulic fluid power — Hose and hose assemblies —
Method of collecting a fluid sample for analyzing the
cleanliness of a hose or hose assembly
1 Scope

This document specifies two methods for collecting a fluid sample to be used to analyse the cleanliness

of hydraulic fluid power hoses or hose assemblies within a certain inside diameter and length range

(this range includes the majority of hose assemblies of real fluid power applications).

The two methods described in this document are intended for collecting only solid particulate

contamination; they may not be appropriate for collecting contamination in liquid or grease form.

This document is a specific application of ISO 18413:2015, specifically Annexes A and B.

The scope of this document does not include providing efficient and effective cleaning methods for hose

assemblies. These methods are recommended for statistical validation of other hose cleaning methods,

which are more suitable for systematic processing of large production batches.
Contamination analysis is excluded from the scope of this document.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 4405, Hydraulic fluid power — Fluid contamination — Determination of particulate contamination by

the gravimetric method

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

ISO 4407, Hydraulic fluid power — Fluid contamination — Determination of particulate contamination by

the counting method using an optical microscope
ISO 4788, Laboratory glassware — Graduated measuring cylinders
ISO 5598, Fluid power systems and components — Vocabulary

ISO 11500, Hydraulic fluid power — Determination of the particulate contamination level of a liquid sample

by automatic particle counting using the light-extinction principle

ISO 18413, Hydraulic fluid power — Cleanliness of components — Inspection document and principles

related to contaminant extraction and analysis, and data reporting
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5598 and ISO 18413 and the

following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2018 – All rights reserved 1
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ISO/TS 18409:2018(E)
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
SCL
hose cleanliness level
hose assembly cleanliness level

cleanliness level of a hydraulic fluid power hose or hose assembly with regards to solid particulate

contamination

Note 1 to entry: This may consist of a set of numbers of contaminant particles per 100 ml in each particle size

class of interest or any other cleanliness level code agreed upon.
3.2
contaminant

loose or detachable solid material present in a hose or hose assembly or on a wetted surface of a hose or

hose assembly
3.3
controlled surface

wetted surface of a part or component that is subject to a cleanliness requirement

Note 1 to entry: For the purposes of this document, A represents the nominal surface area of the test item that is

exposed to system liquid.
3.4
controlled volume
volume of a part or component that is subject to a cleanliness requirement

Note 1 to entry: For the purposes of this document, V represents the nominal internal volume of the test item

that the system liquid will occupy during normal end use.
3.5
external surfaces

those surfaces that will not be in contact with the system liquid during normal operation of the hose

assembly
3.6
nominal inside diameter
int
nominal inside diameter of the hose

Note 1 to entry: This is to be considered a dimensional quantity for calculation purposes in accordance with

Annex B.
3.7
nominal length of the test item
nominal length of the hose or hose assembly whose cleanliness shall be analysed

Note 1 to entry: This is to be considered a dimensional quantity for calculation purposes in accordance with

Annex B.
4 Test equipment

4.1 Sample containers, cleaned, qualified, and controlled as appropriate for purpose. ISO 3722

provides an acceptable method of qualification and control.
2 © ISO 2018 – All rights reserved
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ISO/TS 18409:2018(E)

4.2 Graduated cylinders or beakers, as required, conforming to ISO 4788 and cleaned, qualified,

and controlled as appropriate for purpose. ISO 3722 provides an acceptable method of qualification and

control.

4.3 Caps or plugs, as required to seal test items; these shall be leak-free and properly rinsed or flushed

and shall not increase the measured contamination of the test item.
4.4 Test liquid, with the following characteristics:

a) It shall be compatible with all materials used in the test item, as well as with the working liquid of

the final system. It should also be compatible with the test equipment, including seals and filters.

b) It shall have a viscosity of ≤5 mm /s at the test temperature.

c) It shall have a contamination level sufficiently low to minimize its contribution to the total

measured test item’s contamination. If different specifications are no
...

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