Kite boarding - Release system - Safety requirements and test methods (ISO 21853:2020)

This document specifies the minimum safety requirement and test methods for a release system that reduces the pulling force of the kite and disconnects the user from the kite.
This document is applicable for release systems which are operated intentionally by the user or another person, and are used for the sport of kite boarding.

Kite-Boarden - Auslösesystem - Sicherheitstechnische Anforderungen und Prüfverfahren (ISO 21853:2020)

Dieses Dokument legt die sicherheitstechnischen Mindestanforderungen und Prüfverfahren für ein Auslösesystem fest, das die Zugkraft des Kites reduziert und den Benutzer vom Kite trennt.
Dieses Dokument ist anwendbar auf Auslösesysteme, die vorsätzlich vom Benutzer oder einer anderen Person betätigt und für die Sportart des Kite-Boardens verwendet werden.

Kite - Système de sécurité - Exigences de sécurité et méthodes d'essai (ISO 21853:2020)

Le présent document spécifie les exigences minimales de sécurité et les méthodes d'essai relatives à un système de sécurité qui réduit la force de traction de l'aile et désolidarise l'utilisateur de l'aile.
Le présent document s'applique aux systèmes de sécurité qui sont actionnés de manière intentionnelle par l'utilisateur ou toute autre personne et sont utilisés dans le cadre de la pratique du kite.

Kajtanje - Varnostni sistem za spuščanje kajta - Varnostne zahteve in preskusne metode (ISO 21853:2020)

General Information

Status
Published
Publication Date
03-Mar-2020
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
04-Mar-2020
Completion Date
04-Mar-2020

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SLOVENSKI STANDARD
SIST EN ISO 21853:2020
01-junij-2020
Kajtanje - Varnostni sistem za spuščanje kajta - Varnostne zahteve in preskusne
metode (ISO 21853:2020)
Kite boarding - Release system - Safety requirements and test methods (ISO
21853:2020)

Kite-Boarden - Auslösesystem - Sicherheitstechnische Anforderungen und Prüfverfahren

(ISO 21853:2020)
Kite - Système de sécurité - Exigences de sécurité et méthodes d'essai (ISO
21853:2020)
Ta slovenski standard je istoveten z: EN ISO 21853:2020
ICS:
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
SIST EN ISO 21853:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 21853:2020
---------------------- Page: 2 ----------------------
SIST EN ISO 21853:2020
EN ISO 21853
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 97.220.40
English Version
Kite boarding - Release system - Safety requirements and
test methods (ISO 21853:2020)

Kite - Système de sécurité - Exigences de sécurité et Kite-Boarden - Auslösesystem - Sicherheitstechnische

méthodes d'essai (ISO 21853:2020) Anforderungen und Prüfverfahren (ISO 21853:2020)

This European Standard was approved by CEN on 10 January 2020.

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 NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21853:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 21853:2020
EN ISO 21853:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 21853:2020
EN ISO 21853:2020 (E)
European foreword

This document (EN ISO 21853:2020) has been prepared by Technical Committee ISO/TC 83 "Sports and

other recreational facilities and equipment" in collaboration with Technical Committee CEN/TC 136

“Sports, playground and other recreational facilities and equipment” the secretariat of which is held by

DIN.

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 September 2020, and conflicting national standards

shall be withdrawn at the latest by September 2020.

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.

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 21853:2020 has been approved by CEN as EN ISO 21853:2020 without any modification.

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SIST EN ISO 21853:2020
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SIST EN ISO 21853:2020
INTERNATIONAL ISO
STANDARD 21853
First edition
2020-02
Kite boarding — Release system —
Safety requirements and test methods
Kite — Système de sécurité — Exigences de sécurité et méthodes d'essai
Reference number
ISO 21853:2020(E)
ISO 2020
---------------------- Page: 7 ----------------------
SIST EN ISO 21853:2020
ISO 21853:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 21853:2020
ISO 21853:2020(E)
Contents Page

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

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

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

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

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

4 Safety requirements ......................................................................................................................................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Strength ......................................................................................................................................................................................................... 2

4.3 Design ............................................................................................................................................................................................................. 2

4.4 Handling........................................................................................................................................................................................................ 3

4.4.1 General...................................................................................................................................................................................... 3

4.4.2 Triggering force ................................................................................................................................................................ 3

4.4.3 Release force ........................................................................................................................................................................ 3

4.4.4 Duration of release ......................................................................................................................................................... 3

4.4.5 Reachability .......................................................................................................................................................................... 4

4.5 Behaviour during release ............................................................................................................................................................... 4

4.6 Additional requirements for cold and wet conditions .......................................................................................... 4

4.7 Information supplied by the manufacturer .................................................................................................................... 4

4.7.1 User's manual ..................................................................................................................................................................... 4

4.7.2 Marking on the product ............................................................................................................................................. 5

5 Test methods ............................................................................................................................................................................................................. 5

5.1 Test apparatus ......................................................................................................................................................................................... 5

5.2 Test environment .................................................................................................................................................................................. 6

5.2.1 Dry and clean conditions .......................................................................................................................................... 6

5.2.2 Sand ............................................................................................................................................................................................. 6

5.3 Test conditions ........................................................................................................................................................................................ 6

5.3.1 Dry and clean conditions .......................................................................................................................................... 6

5.3.2 Dry sand .................................................................................................................................................................................. 6

5.3.3 Water with sand ............................................................................................................................................................... 7

5.3.4 Cold and wet conditions ............................................................................................................................................ 7

5.4 Sampling ....................................................................................................................................................................................................... 8

5.5 Preparation ................................................................................................................................................................................................ 8

5.5.1 General function ............................................................................................................................................................... 8

5.5.2 Releasing without generated load .................................................................................................................... 8

5.5.3 Pre-stress .................. .................................................... .......................................................................................................... 8

5.6 Procedure .................................................................................................................................................................................................... 8

5.6.1 General...................................................................................................................................................................................... 8

5.6.2 Strength test ......................................................................................................................................................................11

5.6.3 Dry and clean conditions .......................................................................................................................................11

5.6.4 Dry sand ...............................................................................................................................................................................12

5.6.5 Water with sand ............................................................................................................................................................12

5.6.6 Cold and wet conditions .........................................................................................................................................12

5.7 Sharp edges .............................................................................................................................................................................................12

5.8 Durability of marking .....................................................................................................................................................................12

6 Test report ................................................................................................................................................................................................................12

Annex A (informative) Test overview ................................................................................................................................................................13

© ISO 2020 – All rights reserved iii
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SIST EN ISO 21853:2020
ISO 21853:2020(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 83, Sports and other recreational facilities

and equipment.

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 © ISO 2020 – All rights reserved
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SIST EN ISO 21853:2020
ISO 21853:2020(E)
Introduction

In the last two decades, the sport of kite boarding/kite surfing has transformed from a marginal

sport to a popular sport performed by people of varying age groups and physiological condition levels.

However, it cannot be neglected that kite boarding still is considered an "extreme sport" due to risks

associated with speed, water and nature and unforeseeable situations related to these. If a situation

arising cannot be controlled by the user, the release system will be the component which would most

likely prevent emergencies, incidents, further injuries, or death.

This document has been developed in connection with the Global Kitesports Association (GKA) and

other stakeholders, such as trainers/instructors, test houses, universities and other manufacturers.

The aim of this document is to lower the risks associated with the sport for users and others.

When developing this document, requirements and test methods have been considered that resemble

as closely as possible situations occurring and conditions present while performing the sport. One of

the aspects was related to salt water. Tests conducted for validating the test methods have shown that

using salt water or non-salted water has no effect on the test results. In order to keep the test method

as simple as possible, it was seen more practical for the test to use non-salted water. In contrast to salt

water, sand has shown to have prominent effect on the function of the components and consequently

the test results.
© ISO 2020 – All rights reserved v
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SIST EN ISO 21853:2020
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SIST EN ISO 21853:2020
INTERNATIONAL STANDARD ISO 21853:2020(E)
Kite boarding — Release system — Safety requirements
and test methods
1 Scope

This document specifies the minimum safety requirement and test methods for a release system that

reduces the pulling force of the kite and disconnects the user from the kite.

This document is applicable for release systems which are operated intentionally by the user or another

person, and are used for the sport of kite boarding.
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 679, Cement — Test methods — Determination of strength

EN 12275, Mountaineering equipment — Connectors — Safety requirements and test methods

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
kite
wing which generates an aerodynamic force and propels the user
EXAMPLE A wing that uses wind.
3.2
kite boarding

sum of the disciplines that can be performed with a kite (3.1) attached to the user with any kind of

board in any kind of environment
EXAMPLE Kite surfing, landboarding.
3.3
connection point

equipment on the harness or similar means affixed to the user where the main release system (3.4) is

attached
3.4
connecting link

part which allows the rider to stay connected to the kite via the disconnecting release system after

triggering the main release system
EXAMPLE A leash.
© ISO 2020 – All rights reserved 1
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SIST EN ISO 21853:2020
ISO 21853:2020(E)
3.5
release system

set of elements dedicated to reduce the risk of the user and of third parties, providing the functions of

the main release system and/or disconnecting release system
3.5.1
main release system

system that, when triggered via the trigger element, reduces or cancels the pulling force generated by

the kite
3.5.2
disconnecting release system

system that, when triggered via the trigger element, disconnects the user from the kite completely

3.6
control system

sum of the components held in the user's hand that enable the kite to turn and the traction force to

be altered
EXAMPLE A bar.
3.7
act of triggering

act of movement from first intended movement of any triggering element and releasing element until

the system releases
3.8
space of activation

space required for the movement of all the involved triggering elements and releasing elements to

function properly
4 Safety requirements
4.1 General

After each use, the release system shall not show signs of permanent deformation or of having been

affected by the triggering in any way that could provoke malfunction.
Test in accordance with 5.6.
4.2 Strength

The main release system shall withstand a load of three times the maximum user weight as intended

by the manufacturer or 3 600 N, whichever is greater, without any breakage and shall still function as

intended by the manufacturer.

The disconnecting release system and the connecting link, if used, shall withstand a load of two times

the maximum user weight as intended by the manufacturer or 2 400 N, whichever is greater, without

any breakage and shall still function as intended by the manufacturer.
Test in accordance with 5.6.2.
4.3 Design

The design of the release system shall indicate how to trigger it. The direction of triggering shall be

permanently identifiable.
2 © ISO 2020 – All rights reserved
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SIST EN ISO 21853:2020
ISO 21853:2020(E)
Test in accordance with 5.8.

EXAMPLE An example for this is a 3D structure (such as an embossed or elevated arrow) on the surface, or

a colour.

The part of the release system which is used for triggering, i.e. the triggering element, shall have a

contrasting colour to the other parts of the release system, predominantly (>50 %) in red on its visible

surface. The other parts of the release system shall not be in contrasting colours to each other.

The release system should be free from finger entrapments, squeeze and shear points.

Edges that could come into contact with the user's hands during use or handling and maintenance

should not be sharp, e.g. deburred, broken, rolled or processed with comparable techniques.

Test in accordance with 5.7.

The space of activation shall not be restricted at any time by any part of the control system and by any

part/component of the release system.

NOTE This also relates to soft parts/components of the release system which could, while being gripped and

used for triggering, deform and/or tilt and consequently obstruct the actual movement of triggering.

While being triggered, no part/component of the release system should impact the user's hands.

4.4 Handling
4.4.1 General

It shall be possible to trigger the main release system by a first single action.

It shall be possible to trigger the disconnecting release system it by a second single action.

The action for triggering shall be ergonomically and kinematically suitable for the physiological

movements of the user.

It should be possible to trigger the main release system/disconnecting release system with garments,

e.g. gloves.
4.4.2 Triggering force
The force to perform the act of triggering shall be ≥20 N and ≤170 N.

Test in accordance with 5.6.1 in relation to certain conditions (see 5.6.3.1, 5.6.3.2, 5.6.4, 5.6.5 and, if

appropriate, 5.6.6).

The release system shall not show signs of plastic deformation or of having been affected by the tests in

any way that could provoke malfunction.
4.4.3 Release force

It shall be possible to trigger the main release system and/or disconnecting release system with one

hand only, without any load simulating the pulling force of the kite.
Test in accordance with 5.5.2.
4.4.4 Duration of release

The main release system and/or disconnecting release system shall be triggered in ≤2 s.

Test in accordance with 5.6.1.
© ISO 2020 – All rights reserved 3
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SIST EN ISO 21853:2020
ISO 21853:2020(E)
4.4.5 Reachability

It shall be possible to trigger the main release system and/or disconnecting release system with either

of the user's hands as described in the user's manual. The connection points should not be on the back

of the user.
4.5 Behaviour during release

All parts of the main release system and/or disconnecting release system designed to disengage as

intended by the manufacturer, by the act of triggering, shall disengage (force generated by kite reduced

or cancelled).

The disconnecting release system shall further disconnect the user from the kite.

Test in accordance with 5.6.
4.6 Additional requirements for cold and wet conditions

If the release system is designed to be used in cold and wet conditions, it shall be able to trigger the

main release system and/or disconnecting release system in extremely cold and humid conditions, as

defined in the test conditions.

NOTE Cold and wet conditions are related to snow kiting or other icy condition in which the user is likely to

wear gloves or other garments.
Test in accordance with 5.6.6.
4.7 Information supplied by the manufacturer
4.7.1 User's manual

The manufacturer shall provide information for use in written form at the point of sale with at least the

following:
a) reference to this document, i.e. ISO 21853:2020;
b) name and address of the manufacturer;

c) a recommendation to become familiar with the correct use of the release system;

d) warning to check the function of the release system before and after each use;

e) maintenance and cleaning instructions, including detail on wear, tear and replacement;

f) operating instructions outlining the main function(s) of the main release system for which it is

designed and tested, each accompanied with illustrations:
1) position of the connection points on the harness or similar means;

2) how to attach the main release system and/or disconnecting release system onto the

connection points of the harness or similar means to the user;
3) how to trigger the main release system and/or disconnecting release system;
4) how to reset the main release system and/or disconnecting release system;

g) warning that safety procedures cannot be learnt during an emergency situation and thus the use of

the release system requires training, e.g. by a recognized instructor or in a kite school;

h) maximum user weight, recommended to also have minimum user weight;
4 © ISO 2020 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 21853:2020
ISO 21853:2020(E)

i) if the test in accordance with 5.6.6 has not been performed or passed, an indication that the release

system is impaired when used in icy conditions, e.g. for snow kiting;

j) information on compatibility with other systems, e.g. intended for hook, for ring, for rope and/or

different means as connection point;

k) note on potential risks if the release system is not used as intended by the manufacturer.

If applicable, illustrations of secondary functions of the release system should be included.

4.7.2 Marking on the product

The release system shall be visibly and permanently marked at least with the following information:

a) reference to this document, i.e. ISO 21853:2020;
b) maximum user weight;
c) identification of the direction of the triggering operation;
d) name of the brand
1) on the main release system, and
2) on the disconnecting release system.
The user's minimum weight may be marked.
Test in accordance with 5.8.
5 Test methods
5.1 Test apparatus
The following equipment shall be used:
a) a dynamometric measuring device;
b) a time measuring device;

c) a tensile test bench with a metal oval connector class X in accordance with EN 12275 with an inner

diameter of (30 ± 5) mm and a thickness of (10 ± 2) mm (see key detail Y in Figure 2) connected to

the release system; if the release system is intended to be used with specific connection points, this

shall be identified in the user's manual and provided by the manufacturer;

d) a trigger line with a total length of ≥1 m and ≤3 m, a diameter of (1,6 ± 0,3) mm and an

elongation of ≤1,5 % at 1 000 N shall be connected between the trigger element and the peak

load measuring device;

e) peak load measuring device, sample rate (2 000 ± 100) Hz, temperature coefficient of 0,03 % full

scale per degree Celsius, o
...

SLOVENSKI STANDARD
kSIST FprEN ISO 21853:2019
01-april-2019
=PDMDUVWYRQDYRGLVQHJX9DUQRVWQLVLVWHP]DVSXãþDQMH]PDMD9DUQRVWQH
]DKWHYHLQSUHVNXVQHPHWRGH ,62)',6
Kite boarding - Release system - Safety requirements and test methods (ISO/FDIS
21853:2019)
Kite-Boarding - Sicherheitssystem zum Auslösen des Kite - Sicherheitstechnische
Anforderungen und Prüfverfahren (ISO/FDIS 21853:2019)

Kite boarding - Système de largage pour cerf volant - Éxigences de sécurité et méthodes

d'essai (ISO/FDIS 21853:2019)
Ta slovenski standard je istoveten z: FprEN ISO 21853
ICS:
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
kSIST FprEN ISO 21853:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
kSIST FprEN ISO 21853:2019
---------------------- Page: 2 ----------------------
kSIST FprEN ISO 21853:2019
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21853
ISO/TC 83
Kite boarding — Release system —
Secretariat: DIN
Safety requirements and test methods
Voting begins on:
2019­ 02­ 20
Kite boarding — Système de largage pour cerf volant - Éxigences de
sécurité et méthodes d'essai
Voting terminates on:
2019­ 04­ 17
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 21853:2019(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2019
---------------------- Page: 3 ----------------------
kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)
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

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
CH1214 V­ ernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)
Contents Page

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

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

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

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

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

4 Safety requirements ......................................................................................................................................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Strength ......................................................................................................................................................................................................... 2

4.3 Design ............................................................................................................................................................................................................. 2

4.4 Handling........................................................................................................................................................................................................ 3

4.4.1 General...................................................................................................................................................................................... 3

4.4.2 Triggering force ................................................................................................................................................................ 3

4.4.3 Release force ........................................................................................................................................................................ 3

4.4.4 Duration of release ......................................................................................................................................................... 3

4.4.5 Reachability .......................................................................................................................................................................... 3

4.5 Behaviour during release ............................................................................................................................................................... 4

4.6 Additional requirements for cold and wet conditions .......................................................................................... 4

4.7 Information supplied by the manufacturer .................................................................................................................... 4

4.7.1 User's manual ..................................................................................................................................................................... 4

4.7.2 Marking on the product ............................................................................................................................................. 5

5 Test methods ............................................................................................................................................................................................................. 5

5.1 Test apparatus ......................................................................................................................................................................................... 5

5.2 Test environment .................................................................................................................................................................................. 6

5.2.1 Dry and clean conditions .......................................................................................................................................... 6

5.2.2 Sand ............................................................................................................................................................................................. 6

5.3 Test conditions ........................................................................................................................................................................................ 6

5.3.1 Dry and clean conditions .......................................................................................................................................... 6

5.3.2 Dry sand .................................................................................................................................................................................. 6

5.3.3 Water with sand ............................................................................................................................................................... 7

5.3.4 Cold and wet conditions ............................................................................................................................................ 7

5.4 Sampling ....................................................................................................................................................................................................... 8

5.5 Preparation ................................................................................................................................................................................................ 8

5.5.1 General function ............................................................................................................................................................... 8

5.5.2 Releasing without generated load .................................................................................................................... 8

5.5.3 Prestr­ ess .................. .................................................... .......................................................................................................... 8

5.6 Procedure .................................................................................................................................................................................................... 8

5.6.1 General...................................................................................................................................................................................... 8

5.6.2 Strength test ......................................................................................................................................................................11

5.6.3 Dry and clean conditions .......................................................................................................................................11

5.6.4 Dry sand ...............................................................................................................................................................................12

5.6.5 Water with sand ............................................................................................................................................................12

5.6.6 Cold and wet conditions .........................................................................................................................................12

5.7 Sharp edges .............................................................................................................................................................................................12

5.8 Durability of marking .....................................................................................................................................................................12

6 Test report ................................................................................................................................................................................................................12

Annex A (informative) Test overview ................................................................................................................................................................13

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kSIST FprEN ISO 21853:2019
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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 83, Sports and other recreational facilities

and equipment.

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 © ISO 2019 – All rights reserved
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Introduction

In the last two decades, the sport of kite boarding/kite surfing has transformed from a marginal

sport to a popular sport performed by people of varying age groups and physiological condition levels.

However, it cannot be neglected that kite boarding still is considered an "extreme sport" due to risks

associated with speed, water and nature and unforeseeable situations related to these. If a situation

arising cannot be controlled by the user, the release system will be the component which would most

likely prevent emergencies, incidents,further injuries, or death.

This document has been developed in connection with the Global Kitesports Association (GKA) and

other stakeholders, such as trainers/instructors, test houses, universities and other manufacturers.

The aim of this document is to lower the risks associated with the sport for users and others.

When developing this document, requirements and test methods have been considered that resemble

as closely as possible situations occurring and conditions present while performing the sport. One of

the aspects was related to salt water. Tests conducted for validating the test methods have shown that

using salt water or non­ salted water has no effect on the test results. In order to keep the test method

as simple as possible, it was seen more practical for the test to use non­ salted water. In contrast to salt

water, sand has shown to have prominent effect on the function of the components and consequently

the test results.
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kSIST FprEN ISO 21853:2019
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21853:2019(E)
Kite boarding — Release system — Safety requirements
and test methods
1 Scope

This document specifies the minimum safety requirement and test methods for a release system that

reduces the pulling force of the kite and disconnects the user from the kite.

This document is applicable for release systems which are operated intentionally by the user or another

person, and are used for the sport of kite boarding.
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 679, Cement — Test methods — Determination of strength

EN 12275, Mountaineering equipment — Connectors — Safety requirements and test methods

3 Terms a nd definiti ons
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
kite
wing which generates an aerodynamic force and propels the user
EXAMPLE A wing that uses wind.
3.2
kite boarding

sum of the disciplines that can be performed with a kite (3.1) attached to the user with any kind of

board in any kind of environment
EXAMPLE Kite surfing, landboarding.
3.3
connection point

equipment on the harness or similar means affixed to the user where the main release system (3.4) is

attached
3.4
connecting link

part which allows the rider to stay connected to the kite via the disconnecting release system after

triggering the main release system
EXAMPLE A leash.
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3.5
release system

set of elements dedicated to reduce the risk of the user and of third parties, providing the functions of

the main release system and/or disconnecting release system
3.5.1
main release system

system that, when triggered via the trigger element, reduces or cancels the pulling force generated by

the kite
3.5.2
disconnecting release system

system that, when triggered via the trigger element, disconnects the user from the kite completely

3.6
control system

sum of the components held in the user's hand that enable the kite to turn and the traction force to

be altered
EXAMPLE A bar.
3.7
act of triggering

act of movement from first intended movement of any triggering element and releasing element until

the system releases
3.8
space of activation

space required for the movement of all the involved triggering elements and releasing elements to

function properly
4 Safety requirements
4.1 General

After each use, the release system shall not show signs of permanent deformation or of having been

affected by the triggering in any way that could provoke malfunction.
Test in accordance with 5.6.
4.2 Strength

If used, the main release system, the disconnecting release system and the connecting link shall

withstand a load of three times the maximum user weight as intended by the manufacturer or 3 600 N,

whichever is greater, without any breakage and shall still function as intended by the manufacturer.

Test in accordance with 5.6.2.
4.3 Design

The design of the release system shall indicate how to trigger it. The direction of triggering shall be

permanently identifiable.
Test in accordance with 5.8.

EXAMPLE 1 An example for this is a 3D structure (such as an embossed or elevated arrow) on the surface, or

a colour.
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The part of the release system which is used for triggering, i.e. the triggering element, shall have a

contrasting colour to the other parts of the release system, predominantly (>50 %) in red on its visible

surface. The other parts of the release system shall not be in contrasting colours to each other.

The release system should be free from finger entrapments, squeeze and shear points.

Edges that could come into contact with the user's hands during use or handling and maintenance

should not be sharp, e.g. deburred, broken, rolled or processed with comparable techniques.

Test in accordance with 5.7.

The space of activation shall not be restricted at any time by any part of the control system and by any

part/component of the release system.

NOTE This also relates to soft parts/components of the release system which could, while being gripped and

used for triggering, deform and/or tilt and consequently obstruct the actual movement of triggering.

While being triggered, no part/component of the release system should impact the user's hands.

4.4 Handling
4.4.1 General

It shall be possible to trigger the main release system by a first single action.

It shall be possible to trigger the disconnecting release system it by a second single action.

The action for triggering shall be ergonomically and kinematically suitable for the physiological

movements of the user.

It should be possible to trigger the main release system/disconnecting release system with garments,

e.g. gloves.
4.4.2 Triggering force
The force to perform the act of triggering shall be ≥20 N and ≤100 N.

Test in accordance with 5.6.1 in relation to certain conditions (see 5.6.3.1, 5.6.3.2, 5.6.4, 5.6.5 and, if

appropriate, 5.6.6).

The release system shall not show signs of plastic deformation or of having been affected by the tests in

any way that could provoke malfunction.
4.4.3 Release force

It shall be possible to trigger the main release system and/or disconnecting release system with one

hand only, without any load simulating the pulling force of the kite.
Test in accordance with 5.5.2.
4.4.4 Duration of release

The main release system and/or disconnecting release system shall be triggered in ≤2 s.

Test in accordance with 5.6.1.
4.4.5 Reachability

It shall be possible to trigger the main release system and/or disconnecting release system with eitherof

the user's hands as described in the user's manual. The connection points should not be on the back of

the user.
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4.5 Behaviour during release

All parts of the main release system and/or disconnecting release system designed to disengage as

intended by the manufacturer, by the act of triggering, shall disengage (force generated by kite reduced

or cancelled).

The disconnecting release system shall further disconnect the user from the kite.

Test in accordance with 5.6.
4.6 Additional requirements for cold and wet conditions

If the release system is designed to be used in cold and wet conditions, it shall be able to trigger the

main release system and/or disconnecting release system in extremely cold and humid conditions, as

defined in the test conditions.

NOTE Cold and wet conditions are related to snow kiting or other icy condition in which the user is likely to

wear gloves or other garments.
Test in accordance with 5.6.6.
4.7 Information supplied by the manufacturer
4.7.1 User's manual

The manufacturer shall provide information for use in written form at the point of sale with at least the

following:
a) reference to this document, i.e. ISO 21853:2019;
b) name and address of the manufacturer;

c) a recommendation to become familiar with the correct use of the release system;

d) warning to check the function of the release system before and after each use;

e) maintenance and cleaning instructions, including detail on wear, tear and replacement;

f) operating instructions outlining the main function(s) of the main release system for which it is

designed and tested, each accompanied with illustrations:
1) position of the connection points on the harness or similar means;

2) how to attach the main release system and/or disconnecting release system onto the

connection points of the harness or similar means to the user;
3) how to trigger the main release system and/or disconnecting release system;
4) how to reset the main release system and/or disconnecting release system;

g) warning that safety procedures cannot be learnt during an emergency situation and thus the use of

the release system requires training, e.g. by a recognized instructor or in a kite school;

h) maximum user weight, recommended to also have minimum user weight;

i) if the test in accordance with 5.6.6 has not been performed or passed, an indication that the release

system is impaired when used in icy conditions, e.g. for snow kiting;

j) information on compatibility with other systems, e.g. intended for hook, for ring, for rope and/or

different means as connection point;

k) note on potential risks if the release system is not used as intended by the manufacturer.

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If applicable, illustrations of secondary functions of the release system should be included.

4.7.2 Marking on the product

The release system shall be visibly and permanently marked at least with the following information:

a) reference to this document, i.e. ISO 21853:2019;
b) maximum user weight;
c) identification of the direction of the triggering operation;
d) name of the brand:
1) on the main release system, and
2) on the disconnecting release system.
The user's minimum weight may be marked.
Test in accordance with 5.8.
5 Test methods
5.1 Test apparatus
The following equipment shall be used:
a) a dynamometric measuring device;
b) a time measuring device;

c) a tensile test bench with a metal oval connector class X in accordance with EN 12275 with an inner

diameter of (30 ± 5) mm and a thickness of (10 ± 2) mm (see key detail Y in Figure 2) connected to

the release system; if the release system is intended to be used with specific connection points, this

shall be identified in the user's manual and provided by the manufacturer;

d) a trigger line with a diameter of (2 ± 1) mm, an elasticity of ≤1 % at 200 N and a breaking strength

of ≥400 N to be connected to the trigger element;

e) peak load measuring device, sample rate ≥1 000 Hz and accuracy ≥0,2 % within the range of ≥0 kg

and ≤20 kg;
f) a round tub with an inner diameter of (450 ± 50) mm (see Figure 2);

g) a device to measure the surface temperature, e.g. optical measurement or thermocouple.

The following additional equipment may be used:

h) a digital video equipment in order to time the operations, visualize the load losses and identify any

complication in the activation of the systems;

i) a digital photo equipment in order to be able to save pictures of potential flaws in the safety

systems.
If not specified otherwise, the following tolerances apply:
+5%
j) Force for the load application, in Newton:
k) dimensions, in millimetre: ±1;
l) angle, in Degree: ±1;
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m) temperature, in Degree Celsius: ±2;
n) time, in second: ±5 %.
5.2 Test environment
5.2.1 Dry and clean conditions
The ambient temperature shall be ≤23 °C.
5.2.2 Sand
The sand shall be in accordance with ISO 679.
5.3 Test conditions
5.3.1 Dry and clean conditions
No conditioning shall be done.
5.3.2 Dry sand

The release system shall be cleaned without water to remove possible sand from a previous test

sequence or test cycle and to keep it dry.

The main release system and/or disconnecting release system shall be moved clockwise in five full

circles horizontally in accordance with Figure 1 in sand in accordance with 5.2.2 within (8 ± 2) s while

touching the inner bottom surface and inner side wall of the tub in accordance with 5.1 f). The safety

system shall be fully immerged in sand throughout that time.

NOTE The release system is usually moved around manually without touching the trigger element.

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Key
1 inner side wall of the round tub
Figure 1 — Movement of release system in sand for conditioning
The release system shall not be triggered.
After each conditioning, the sand shall be redistributed evenly in the tub.
This conditioning shall be done before each test in 5.6.4.
5.3.3 Water with sand

The release system shall be rinsed in non-salted water in order to remove possible sand from a previous

test sequence or test cycle.

The conditioning shall be done in accordance with 5.3.2 but with non­ salted water. The water­ to­

sand-ratio shall be 1:1 by volume. This mixture shall cover the release system entirely throughout the

conditioning.
This conditioning shall be done before each test in 5.6.5.
5.3.4 Cold and wet conditions

The assembled ("ready for use") main release system and/or disconnecting release system is fully spray

covered by 20 ml of distillated water with a temperature of ≤10 °C. Without being dried and shaken,

the main release system and/or disconnecting release system is exposed for 2 h to a temperature

of (−18 ± 1) °C. For this, the main release system and/or disconnecting release system is suspended

vertically in a use-like manner.
This conditioning shall be done before each test in 5.6.6.
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5.4 Sampling
One sample of a release system ready for te
...

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