Small craft - Remote hydraulic steering systems (ISO 10592:2022)

This document specifies the requirements for the design, installation and testing of engine-mounted
and craft-mounted remote hydraulic steering systems used with single and multiple engine installations
of outboard engines over 15 kW per engine, as well as with single and multiple engines of inboard,
sterndrive, and water jet drives, all used on small craft.
This document does not address emergency means of steering the craft.

Kleine Wasserfahrzeuge - Hydraulische Steueranlagen (ISO 10592:2022)

Dieses Dokument legt die Anforderungen an Entwurf, Einbau und Prüfungen von motorseitigen und fahrzeugseitigen hydraulischen Steueranlagen fest, die alle mit ein- oder mehrmotorigen Anlagen von Außenbordmotoren mit einer Leistung über 15 kW je Motor sowie ein- oder mehrmotorigen Anlagen mit Innenbordmotor, Z-Antrieb und Wasserstrahlantrieb an kleinen Wasserfahrzeugen verwendet werden.
Dieses Dokument behandelt keine Mittel zur Steuerung des Wasserfahrzeugs im Notfall (Notsteuerung).

Petits navires - Système de direction hydraulique commandé à distance (ISO 10592:2022)

Le présent document spécifie les exigences relatives à la conception, l’installation et aux essais des systèmes de direction hydrauliques commandés à distance, montés sur le moteur ou montés sur le bateau, utilisés dans les installations de moteurs hors-bord simples ou multiples, avec des moteurs hors-bord de plus de 15 kW par moteur, ainsi que dans les installations simples ou multiples de moteurs intérieurs, à embase arrière de transmission ou à propulsion par jet d’eau, utilisées sur les petits navires.
Ce document ne traite pas des dispositifs de barre de secours pour diriger le bateau.

Mala plovila - Daljinski hidravlični sistemi krmiljenja (ISO 10592:2022)

Ta dokument določa zahteve za projektiranje, vgradnjo in preskušanje daljinskih hidravličnih sistemov krmiljenja, nameščenih v motor in plovilo, ki se uporabljajo v sistemih z enim in več izvenkrmnimi motorji
z močjo posameznega motorja 15 kW, ter v sistemih vgrajenih, krmnih in vodnih reaktivnih pogonskih enot z enim in več motorji, ki se uporabljajo za mala plovila.
Ta dokument ne obravnava naprav za krmiljenje plovila v sili.

General Information

Status
Published
Public Enquiry End Date
27-Feb-2020
Publication Date
18-Aug-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Jul-2022
Due Date
01-Oct-2022
Completion Date
19-Aug-2022

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SLOVENSKI STANDARD
SIST EN ISO 10592:2022
01-september-2022
Nadomešča:
SIST EN ISO 10592:2017
Mala plovila - Daljinski hidravlični sistemi krmiljenja (ISO 10592:2022)
Small craft - Remote hydraulic steering systems (ISO 10592:2022)
Kleine Wasserfahrzeuge - Hydraulische Steueranlagen (ISO 10592:2022)
Petits navires - Système de direction hydraulique commandé à distance (ISO
10592:2022)
Ta slovenski standard je istoveten z: EN ISO 10592:2022
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
47.080 Čolni Small craft
SIST EN ISO 10592:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10592:2022

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SIST EN ISO 10592:2022


EN ISO 10592
EUROPEAN STANDARD

NORME EUROPÉENNE

July 2022
EUROPÄISCHE NORM
ICS 47.080 Supersedes EN ISO 10592:2017
English Version

Small craft - Remote hydraulic steering systems (ISO
10592:2022)
Petits navires - Système de direction hydraulique Kleine Wasserfahrzeuge - Hydraulische Steueranlagen
commandé à distance (ISO 10592:2022) (ISO 10592:2022)
This European Standard was approved by CEN on 3 May 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10592:2022 E
worldwide for CEN national Members.

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SIST EN ISO 10592:2022
EN ISO 10592:2022 (E)
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered . 4

2

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SIST EN ISO 10592:2022
EN ISO 10592:2022 (E)
European foreword
This document (EN ISO 10592:2022) has been prepared by Technical Committee ISO/TC 188 "Small
craft" in collaboration with Technical Committee CEN/TC 464 “Small Craft” the secretariat of which is
held by SIS.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2023, and conflicting national standards shall
be withdrawn at the latest by January 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10592:2017.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 10592:2022 has been approved by CEN as EN ISO 10592:2022 without any modification.

3

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SIST EN ISO 10592:2022
EN ISO 10592:2022 (E)
Annex ZA
(informative)

Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered
This European Standard has been prepared under a Commission standardization request
M/542/C(2015) 8736 final to provide one voluntary means of conforming to essential requirements of
Directive 2013/53/EU.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and
Annex I of Directive 2013/53/EU
Essential Requirements of Clause(s)/sub-clause(s) Remarks/Notes
Directive 2013/53/EU of this EN
Annex I, Clause 5.4.1, Steering 4, 5, 6, 7, 8, 9 and 11 This standard specifies the
system, general. requirements for remote
hydraulic steering systems from
the helm up to and including the
output device connection point.
This standard does not address
propulsion control systems
This standard does not address
an emergency mean of steering.
Annex I, Clause 2.5, Owner’s 10
Manual
Annex II, Components of 4, 5, 7, 9.3 and 11 In respect of hydraulic steering
watercraft (3) Steering wheels, mechanisms supplied as
steering mechanisms and cable components only.
assemblies.
Steering wheels and cable
assemblies supplied as
components are excluded from
this standard.
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.

4

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SIST EN ISO 10592:2022
INTERNATIONAL ISO
STANDARD 10592
Second edition
2022-06
Small craft — Remote hydraulic
steering systems
Petits navires — Système de direction hydraulique commandé à
distance
Reference number
ISO 10592:2022(E)
© ISO 2022

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SIST EN ISO 10592:2022
ISO 10592:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

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SIST EN ISO 10592:2022
ISO 10592:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 4
5 Materials . 7
6 Outboard engines and sterndrives. 7
7 Steering system requirements .13
8 Installation .14
9 Test requirements .18
9.1 Installed proof tests . 18
9.2 System application tests . 18
9.3 Steering system components tests . 18
10 Owner’s manual .21
11 Installation manual .22
Bibliography .23
iii
© ISO 2022 – All rights reserved

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SIST EN ISO 10592:2022
ISO 10592:2022(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 188, Small craft, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 464, Small craft, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 10592:1994), which has been technically
revised.
The main changes are as follows:
— in Clause 3, definitions have been updated;
— throughout the text, requirements have been updated to meet the state of the art;
— the steering wheel requirements and tests have been removed;
— former Clause 12, Designation, has been removed.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
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SIST EN ISO 10592:2022
INTERNATIONAL STANDARD ISO 10592:2022(E)
Small craft — Remote hydraulic steering systems
1 Scope
This document specifies the requirements for the design, installation and testing of engine-mounted
and craft-mounted remote hydraulic steering systems used with single and multiple engine installations
of outboard engines over 15 kW per engine, as well as with single and multiple engines of inboard,
sterndrive, and water jet drives, all used on small craft.
This document does not address emergency means of steering the craft.
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 8848:2022, Small craft — Remote mechanical steering systems
ISO 12217-1:2015, Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-
sailing boats of hull length greater than or equal to 6 m
ISO 12217-2:2015, Small craft — Stability and buoyancy assessment and categorization — Part 2: Sailing
boats of hull length greater than or equal to 6 m
ISO 12217-3:2015, Small craft — Stability and buoyancy assessment and categorization — Part 3: Boats of
hull length less than 6 m
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
burst pressure
pressure at which the system exceeds the ultimate strength of the weakest hydraulic component,
resulting in a drop of hydraulic pressure
3.2
component interface
mechanical interface (3.4) or hydraulic interface (3.3) at a point in the steering system (3.14) where a
connection is made between components that are not supplied as part of the same assembly kit
Note 1 to entry: If hydraulic fluid lines are not shipped as part of the steering kit, there is an interface between
the helm and the fluid lines, and between the output device (3.12) and the fluid lines.
3.3
hydraulic interface
interface between two or more hydraulic components where force and motion are transmitted by
hydraulic fluid
1
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SIST EN ISO 10592:2022
ISO 10592:2022(E)
3.4
mechanical interface
interface where force and motion are transmitted mechanically
3.5
component proof pressure
pressure rating for helms, lines, fittings and output devices (3.12) at which the component performs as
intended
3.6
component maximum working pressure
pressure equivalent to one-half of the component proof pressure (3.5)
3.7
drag link
link rod
link arm
mechanical device used in a steering system (3.14) by which the force of the output device (3.12) is
transmitted to the steering arm (3.22), in either a craft-mounted steering system (3.15) or an engine-
mounted steering system (3.8)
3.8
engine-mounted steering system
steering system (3.14) in which the reactionary forces of the output device (3.12) are resisted by the
propulsion device
3.9
hydraulic helm
mechanism, exclusive of the steering wheel or control element, through which remote manual effort is
converted to hydraulic pressure and flow
3.10
remote hydraulic steering system
steering system (3.14) that utilizes a hydraulic helm (3.9) to convert operator steering inputs into
hydraulic pressure and flow to actuate an output device (3.12) with no additional energy source
3.11
minimum retained system performance
system performance after test(s) such that at least 90 % of the steering arm (3.22) travel normally
available on each side of the mid-position can be attained by exertion of no more than 27 Nm of torque
at the helm through the steering wheel or control element
Note 1 to entry: This criterion does not define the steering system (3.14) performance while a craft (3.23) is
underway, but is intended to provide quantitative limits for design and testing purposes.
3.12
output device
hydraulic cylinder, rotary actuator or other device that converts hydraulic pressure and flow into force
on, and movement of, the steerable device
3.13
rate of steering response
ratio of output movement to input movement
3.14
steering system
assembly that includes all components necessary to transmit remote manual effort to the steerable
device
2
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SIST EN ISO 10592:2022
ISO 10592:2022(E)
3.15
craft-mounted steering system
steering system (3.14) in which the reactionary forces of the output device (3.12) are resisted by the
craft (3.23)
3.16
hydraulic fitting
part or design feature on a component used to join (i.e. connect) any pressure retaining components in
the steering system (3.14)
3.17.1
system design peak pressure
greater of the pressures generated by the application of either a 1 672 Nm
system torque (3.20) to the steering axis of the outboard engine(s), inboard engine rudder, sterndrive,
or water jet drive(s), or a single tangential load of 445 N; or system relief pressure (3.19) if relief activates
during application of a 445 N load at D on the steering wheel rim or at D on the handgrip with the
s s
largest diameter D wheel specified for the hydraulic helm
s
3.17.2
system design peak pressure
greater of the pressures generated by the application of either
a 3 344 Nm system torque (3.20) to the steering axis of the outboard engines, or a single tangential load
of 445 N; or system relief pressure (3.19) if relief activates during application of a 445 N load at D on
s
the steering wheel rim or at D on the handgrip with the largest diameter D wheel specified for the
s s
hydraulic helm
3.18
system proof pressure
pressure attained by a system if equipped with an activated pressure relief device, or a single tangential
load of 450 ± 5 N at the steering wheel rim or handgrip with the largest diameter D wheel specified for
s
the helm
3.19
system relief pressure
pressure limit when a pressure relief device activates
3.20
system torque
total combined torque applied to the outboard engine(s) axis (or axes), inboard rudder, sterndrive or
waterjet propulsion system that is resisted by the component(s) of the steering system (3.14)
Note 1 to entry: Outboard engine example shown in Figure 1.
3
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SIST EN ISO 10592:2022
ISO 10592:2022(E)
Key
1 engine 1 torque
2 engine 2 torque
3 engine 3 torque
4 engine 4 torque
Figure 1 — System torque
3.21
multiple engine installation
two or more engines, normally used simultaneously for a craft’s (3.23) main propulsion, controlled by a
common steering system (3.14)
3.22
steering arm
portion of the outboard engine that the steering system (3.14) makes mechanical interface (3.4) with
3.23
craft
small craft
recreational boat, and other watercraft using similar equipment, of up to 24 m length of hull (L )
H
Note 1 to entry: The measurement methodology for length of hull is defined in ISO 8666.
[SOURCE: ISO 8666:2020, 3.15, modified — Note 1 to entry has been added.]
4 General requirements
4.1 The craft manufacturer shall install the complete remote hydraulic steering system on the craft
to at least the applicable points listed in a) or b) as follows.
a) For craft with outboard engines, the steering system shall be complete from the control element
to the mechanical interface for connection of the drag link supplied with the outboard engine, or
shall provide an alternative means to connect the output device to the engine so that the loading
magnitude and offset are consistent with the steering arm’s intended purpose.
b) In all other craft, the steering system shall be complete from the control element to the output
connection point on the steerable device.
4
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SIST EN ISO 10592:2022
ISO 10592:2022(E)
4.2 All threaded fasteners whose integrity affects operation of the remote hydraulic steering system
so that separation or loss of the fastener would cause total loss of steering without warning shall be
provided with a locking means. This requirement does not apply to hydraulic fittings.
4.3 Threaded fasteners whose integrity affects operation of the steering system so that separation
or loss of the fasteners can cause total loss of steering without warning, and that can be expected to
be disturbed by installation or adjustment procedures, shall be referenced by instructions for correct
assembly, and
a) shall be locked by a device whose presence is determined by visual inspection, or by feel, following
assembly, or
b) shall incorporate integral locking means, provided the fastener cannot be omitted or substituted
without making the system inoperable.
The requirements of 4.3 do not apply to hydraulic fittings.
NOTE Self-locking nuts with plastic inserts that create mechanical plastic interference meet the above
stated requirements.
4.4 Loose lock washers, distorted thread nuts or separately applied adhesives shall not be used.
4.5 Devices that use plain threaded jam nuts to permit adjustments shall be designed so that total
separation of parts, or total loss of steering, will not occur should they loosen.
4.6 Connection fittings, including quick-disconnect fittings relying only upon a spring or springs to
maintain the connection, shall not be used.
4.7 Operating temperature range — All materials used in the construction of the system and its
accessories shall be capable of operating from –20 °C to +80 °C. Hydraulic system components shall not
be installed in areas where the operating temperature exceeds +80 °C.
4.8 Storage temperature range — All materials used in the construction of the system and its
accessories shall be capable of withstanding an ambient temperature of –40 °C to +85 °C.
NOTE This requirement is not intended to require operation at these temperatures, but is included to
determine that the system withstands the stipulated storage temperatures.
5
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SIST EN ISO 10592:2022
ISO 10592:2022(E)
4.9 All components including, but not limited to, hydraulic lines and fittings, and input and output
devices shall be marked and selected to have a component proof pressure rating not less than the proof
pressure rating on the hydraulic helm as indicated by the manufacturer of the helm. (See Figure 2).
Key
1 hydraulic helm marking: system proof pressure; for example: 6 900 kPa
2 line marking; for example: ≥ 6 900 kPa proof pressure rating or ≥ 3 450 kPa component maximum working
pressure rating
3 cylinder marking; for example: ≥ 6 900 kPa proof pressure rating or ≥ 3 450 kPa component maximum
working pressure rating
Figure 2 — Typical hydraulic steering system schematic
4.10 Components shall have a burst pressure that is not less than the system design peak pressure
throughout the operating temperature range and expected burst pressure variation due to manufacture,
installation, environmental exposure and in use loading, or two times component proof pressure,
whichever is greater.
4.11 Hydraulic lines and fittings shall be selected in accordance with the steering equipment
manufacturers’ instructions.
Hydraulic quick connect fittings whose integrity affects operation of the system so that separation or
loss of the connection would cause total loss of steering without warning shall incorporate a two stage
integral locking means for connection integrity.
4.12 Hydraulic steering systems, including systems with pressure relief devices, shall comply with the
following test to ensure that movement after a relief event is controlled:
— apply an impulse load of at least the system design peak pressure followed directly with at least
one-half system design peak pressure for a duration of at least one-half second;
— the load shall be applied to the steerable device and resisted by the steering system;
— the load shall be applied within 13 degrees of steering centre;
— the system shall not have more than 17 degrees of steering movement.
6
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SIST EN ISO 10592:2022
ISO 10592:2022(E)
4.13 Steering systems shall cause the steerable device to turn on its axis at its rate of steering response
when no greater than 4 % of the full range of the steering movement of the steering wheel or control
element.
4.14 Steering systems shall not cause the operator to re-grip the steering wheel or handgrip more
frequently than once every 30 s due to position drift of 1/4 turn or more of the steering wheel or
handgrip relative to the position of the steerable device.
4.15 Component interfaces and hardware shall be capable of withstanding the forces generated by the
system operating at the system design peak pressure.
4.16 In multiple engine installations that are not mechanically connected, sudden loss of steering
synchronization shall be prevented. Series plumbing of steering components meets this requirement.
4.17 When equipped with the largest diameter D and the deepest dish of the steering wheel for which
s
the helm is rated, all steering components shall be capable of meeting the applicable test requirements
specified in Clause 9.
5 Materials
5.1 Materials used in remote hydraulic steering systems shall be galvanically compatible or suitably
plated to minimize corrosion.
5.2 Copper-base alloys shall be separated from aluminium with a galvanic barrier, such as 300 series
stainless steel or equivalent, or shall be protected from exposure.
5.3 Metallic steering components that are at or below the waterline in the light craft condition, as
defined in ISO 12217-1:2015, ISO 12217-2:2015 and ISO 12217-3:2015, shall be cathodic protected or
galvanically isolated.
5.4 Materials used in remote hydraulic steering systems shall be resistant to deterioration by the
specified hydraulic fluid and by other liquids or compounds with which the material can come in
contact under normal marine services, e.g. grease, lubricating oil, common bilge solvents, and salt and
fresh water.
5.5 Plastics and elastomers that can be exposed to sunlight shall be designed to resist degradation by
ultraviolet radiation.
5.6 The hydraulic fluid shall be non-flammable or have a flash point of 160 °C or over.
6 Outboard engines and sterndrives
6.1 The steering stops on the outboard engine shall permit at least 30° of angular movement either
side of centre.
6.2 The outboard engine shall:
a) incorporate an integrated steering system or meet the applicable dimensional requirements
indicated i
...

SLOVENSKI STANDARD
oSIST prEN ISO 10592:2020
01-februar-2020
Mala plovila - Hidravlični sistemi krmiljenja (ISO/DIS 10592:2019)
Small craft - Hydraulic steering systems (ISO/DIS 10592:2019)
Kleine Wasserfahrzeuge - Hydraulische Steueranlagen (ISO/DIS 10592:2019)
Petits navires - Appareils à gouverner hydrauliques (ISO/DIS 10592:2019)
Ta slovenski standard je istoveten z: prEN ISO 10592
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
47.080 Čolni Small craft
oSIST prEN ISO 10592:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 10592:2020

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oSIST prEN ISO 10592:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10592
ISO/TC 188 Secretariat: SIS
Voting begins on: Voting terminates on:
2019-12-06 2020-02-28
Small craft — Hydraulic steering systems
Navires de plaisance — Appareils à gouverner hydrauliques
ICS: 47.080
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 10592:2019(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2019

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COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 4
5 Materials . 6
6 Outboard motors and sterndrives . 6
7 Steering system requirements .11
8 Installation .12
9 Test Requirements .15
9.1 Installed proof tests .15
9.2 System application tests .15
9.3 Steering system components tests .15
10 Owner’s Manual .18
11 Installation Manual .18
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered .20
Bibliography .21
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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 of 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 www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 188, Small craft, Subcommittee SC 2,
Engines and propulsion systems.
This third edition cancels and replaces the second edition (ISO 10592:2017), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Update of the definitions;
— Update of requirements to meet current industry practice;
— Removal of steering wheel requirements and tests;
— Removal of former section 12 - Designation.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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oSIST prEN ISO 10592:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 10592:2019(E)
Small craft — Hydraulic steering systems
1 Scope
This document specifies the requirements for the design, construction, installation and testing of motor
mounted and craft mounted remote hydraulic steering systems used with single and multiple engine
installations of outboard motors over 15 kW per outboard motor, as well as single and multiple engine
inboard, sterndrive, and water jet drives used on small craft up to 24 m length of hull.
In all steering systems, the hydraulic portions of the system shall comply with relevant sections of this
document.
This document does not address emergency means of steering the craft.
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 8848:2017, Small craft — Remote steering systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
burst pressure
pressure at which the system exceeds the ultimate strength of the weakest hydraulic component
resulting in a release of hydraulic pressure
3.2
component interface
mechanical or hydraulic interface at a point in the steering system where a connection is made between
components that are not supplied as part of the same assembly kit
Note 1 to entry: If oil lines are not shipped as part of the steering kit, there is an interface between the helm and
oil lines, and between the output device and oil lines.
3.3
hydraulic interface
interface between two or more hydraulic components where force and motion are transmitted by
hydraulic fluid
3.4
mechanical interface
interface where force and motion are transmitted mechanically
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3.5
component proof pressure
pressure rating for helms, lines, fittings and output devices which at this pressure the component
performs as intended
3.6
component maximum working pressure
pressure equivalent to one-half of the component proof pressure
3.7
drag link (link rod or link arm)
mechanical device used in a steering system by which the force of the output device is transmitted to
the steering arm in either a craft mounted or motor mounted steering system
3.8
motor mounted steering system
steering system in which the reactionary forces of the output hydraulic steering device are resisted by
the propulsion device
3.9
hydraulic helm
mechanism, exclusive of the steering wheel or other means, through which operator input force is
converted to hydraulic pressure and flow
3.10
manual hydraulic system
steering system which utilizes a hydraulic helm to convert operator steering inputs into hydraulic
pressure and flow to actuate an output device with no additional energy source
3.11
minimum retained system performance
system capability after test(s) such that at least 90 % of the motor steering arm travel normally
available each side of the mid-position may be attained by exertion of no more than 27Nm of torque at
the helm through the wheel or other normal control
Note 1 to entry: This criterion does not define steering system performance while a craft is underway, but is
intended to provide quantitative limits for design and testing purposes.
3.12
output device
hydraulic cylinder, rotary actuator, or other device that converts hydraulic pressure and flow into force
on, and movement of, the steerable device
3.13
rate of steering response
ratio of output movement to input movement
3.14
steering system
assembly, including all components necessary to transmit remote manual effort to the rudder and/or
steerable thrust
3.15
craft steering system
assembly that includes all components necessary to transmit remote manual effort to the rudder,
sterndrive, waterjet drive, or outboard motor
3.16
motor steering system
assembly that includes all components necessary to transmit remote manual effort from the craft
steering system to steerable thrust
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3.17
system design peak pressure

3.17.1 single and twin motors: the greater of the pressures generated by the application of either 1672
Newton-meters system torque to the steering axis of the outboard motor(s), inboard, sterndrive, or water
jet drive(s), or a single tangential load of 445 Newtons, or system relief pressure if relief activates during
application of a 445 Newtons load at the steering wheel rim or handgrip with the maximum diameter
wheel specified for the helm
3.17.2 triple and quadruple outboard motors: the greater of the pressures generated by the
application of either 3344 Newton-meters system torque to the steering axis of the outboard motors, or
a single tangential load of 445 Newton’s, or system relief pressure if relief activates during application of
a 445 Newton’s load at the steering wheel rim or handgrip with the maximum diameter wheel specified
for the helm
3.18
system proof pressure
pressure attained by a system if equipped with an activated pressure relief device, or a single tangential
load 450 ± 5 N at the steering wheel rim or handgrip with the maximum diameter wheel specified for
the helm
3.19
system relief pressure
pressure at which the relief device activates
3.20
system torque
total, combined torque applied to the outboard motor(s) axis (or axes) that is resisted by the
component(s) of the steering system (see Figure 1)
Figure 1 — System torque
3.21
system working pressure
pressure equivalent to one-half of the system proof pressure
3.22
multiple engine installation
two, or more engines, normally used simultaneously for a craft’s main propulsion, controlled by a
common steering system
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4 General requirements
4.1 For craft with outboard motors, the crafts steering system shall be complete to the component
interface for connection to the drag link supplied with the motor, or provide an alternative means to
connect the output device to the motor such that the loading magnitude and offset are consistent with
the tiller arm’s intended purpose. In all other crafts, the steering system shall be complete to the output
connection point.
4.2 All threaded fasteners whose integrity affects operation of the system such that separation or loss of
the fastener would cause sudden loss of steering without warning shall be provided with a locking means.
EXCEPTION: Hydraulic fittings
4.3 Threaded fasteners whose integrity affects operation of the system such that separation or loss
of the fasteners would cause sudden loss of steering without warning, and that may be expected to
be disturbed by installation or adjustment procedures, shall be referenced by instructions for correct
assembly, and
4.3.1 shall be locked by a device whose presence is determined by visual inspection, or by feel,
following assembly, or
4.3.2 shall incorporate integral locking means, provided the fastener cannot be omitted or substituted
without making the system inoperable.
EXCEPTION: Hydraulic fittings
NOTE 1 Self-locking nuts with plastic inserts that create mechanical plastic interference meet the
requirements of section 4.5 and its sub-sections.
NOTE 2 Loose lock washers, distorted thread nuts, or adhesives do not meet the requirements of section 4.3
and its sub-sections.
4.3.3 Devices that use plain threaded jam nuts to permit adjustments shall be designed so that total
separation of parts, or other complete loss of steering, will not occur should they loosen.
NOTE Connection fittings, including “quick disconnect” fittings, relying solely on a spring or springs for
connection integrity, do not meet the requirements of this section.
4.4 Operating temperature range – All materials used in construction of the system and its accessories
must be capable of operating from -20°C to +80°C. Hydraulic system components shall not be installed in
areas where the operating temperature exceeds +80°C.
4.5 Storage Temperature Range - All materials used in construction of the system and its accessories
shall be capable of withstanding an ambient temperature of -40°C to 85°C for at least 1week duration.
NOTE This requirement is not intended to require operation at these temperatures, but is included to
determine that the system will withstand the stipulated storage temperatures.
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4.6 All components including, but not limited to, hydraulic lines and fittings, input and output devices,
shall be selected to have a component proof pressure rating no less than the proof pressure rating on the
hydraulic helm as indicated by the manufacturer of the helm. (See Figure 2).
Key
1 Helm marking: system proof pressure = 6900 kPa
2 Line marking: ≥ 6900 kPa proof pressure rating or ≥3450 working pressure rating
3 Cylinder marking: ≥ 6900 kPa proof pressure rating or ≥ 3450 kPa working pressure rating
Figure 2 — Typical system schematic
4.7 Components shall have a burst pressure that is no less than the system design peak pressure
throughout the normal temperature range and expected burst pressure variation due to manufacture,
installation, environmental exposure, and service loading, or two times component proof pressure
whichever is greater.
4.8 Hydraulic lines and fittings shall be selected in accordance with steering equipment manufacturers’
instructions, and in consideration with the guidelines in Annex A.
NOTE Flareless fittings are not recommended above 3450 kPa system working pressure.
4.8.1 Hydraulic quick connect fittings whose integrity affects operation of the system such that
separation or loss of the connection would cause sudden loss of steering without warning shall
incorporate a two stage integral locking means for connection integrity.
4.9 The hydraulic steering system, including any pressure relief devices, shall not allow more than 17
degrees of steering movement about the steering axis of the steerable device, initiating at the centre and
within 13 degrees of centre, under shock load applied to the steerable device equivalent to system design
peak pressure.
NOTE The shock movement requirement is based on an impulse load applied to the steerable device, and
resisted by the steering system with peak amplitude equivalent to at least design peak pressure and with at least
one-half design peak pressure acting for a duration of at least one-half second.
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4.10 Steering systems shall cause the steerable device to commence movement about its steering axis at
its rate of steering response when no greater than four percent of the full range of steering movement of
the steering wheel or handgrip is imparted to the steering wheel or handgrip.
4.11 Steering systems shall not cause the operator to re-grip the steering wheel or handgrip more
frequently than once every 30 seconds due to position drift of 1/4 turn or more of the steering wheel or
handgrip relative to the position of the steerable device.
4.12 Component interfaces and hardware shall be capable of withstanding the forces generated by
...

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