Ships and marine technology — Shark jaws and towing pins

This document specifies requirements for the design, operation, performance and acceptance tests of marine shark jaws and towing pins having electric, hydraulic, diesel or steam drive. It is applicable to the design, manufacture and acceptance of marine shark jaws and towing pins.

Navires et technologie maritime — Broches d'entraînement et stoppeurs "shark jaws"

General Information

Status
Published
Publication Date
09-Dec-2020
Current Stage
6060 - International Standard published
Start Date
10-Dec-2020
Completion Date
10-Dec-2020
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INTERNATIONAL ISO
STANDARD 24041
First edition
2020-12
Ships and marine technology — Shark
jaws and towing pins
Navires et technologie maritime — Broches d'entraînement et
stoppeurs "shark jaws"
Reference number
ISO 24041:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 24041:2020(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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 24041:2020(E)
Contents Page

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

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

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

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

4 Types ................................................................................................................................................................................................................................. 2

4.1 Types of shark jaws ............................................................................................................................................................................. 2

4.2 Structural form of shark jaws and towing pins ........................................................................................................... 2

5 Design .............................................................................................................................................................................................................................. 3

5.1 Material stresses .................................................................................................................................................................................... 3

5.2 Basic calculation .................................................................................................................................................................................... 4

5.3 Shark jaw design .................................................................................................................................................................................... 5

5.4 Towing pin design ................................................................................................................................................................................ 5

5.5 Support box design .............................................................................................................................................................................. 5

5.6 Lubrication design ............................................................................................................................................................................... 5

5.7 Auxiliary equipment ........................................................................................................................................................................... 5

5.8 Working time control ........................................................................................................................................................................ 6

5.9 Emergency release ............................................................................................................................................................................... 6

6 Performance specifications ....................................................................................................................................................................... 6

6.1 Load requirements .............................................................................................................................................................................. 6

6.2 Working time ............................................................................................................................................................................................ 7

7 Acceptance tests .................................................................................................................................................................................................... 7

7.1 General requirement .......................................................................................................................................................................... 7

7.2 Operation without load ................................................................................................................................................................... 7

7.3 Operation under load ........................................................................................................................................................................ 7

7.4 Control system utility test ............................................................................................................................................................. 8

7.5 Emergency release test .................................................................................................................................................................... 8

7.6 Waterproof test ....................................................................................................................................................................................... 8

8 Designation system ............................................................................................................................................................................................ 8

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 24041:2020(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 8, Ships and marine technology,

Subcommittee SC 4, Outfitting and deck machinery.

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
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 24041:2020(E)
Ships and marine technology — Shark jaws and towing pins
1 Scope

This document specifies requirements for the design, operation, performance and acceptance tests of

marine shark jaws and towing pins having electric, hydraulic, diesel or steam drive.

It is applicable to the design, manufacture and acceptance of marine shark jaws and towing pins.

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 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary and symbols

ISO 7365, Shipbuilding and marine structures — Deck machinery — Towing winches for deep sea use

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 3828 and the following 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
shark jaw
equipment for temporarily securing the inboard end of a towline

Note 1 to entry: A left-hand shark jaw is a shark jaw placed on the left-hand side of the central axis of the towing

pins (3.2) when looking at the bow from the stern of a ship.

Note 2 to entry: A right-hand shark jaw is a shark jaw placed on the right-hand side of the central axis of the

towing pins (3.2) when looking at the bow from the stern of a ship.

Note 3 to entry: A central shark jaw is a shark jaw placed on the central axis of the towing pins (3.2) when looking

at the bow from the stern of a ship.
3.2
towing pin
equipment for leading and restraining a towline to the intended path
3.3
support box
device fixing and supporting the shark jaw (3.1) and towing pins (3.2)
3.4
working height

maximum height from a towline to the board, when shark jaws (3.1) or towing pins (3.2) operate

normally
© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 24041:2020(E)
3.5
emergency release

release and withdrawal actions of a shark jaw (3.1) and towing pins (3.2) depending on standby power

under loss of driving power or in emergency
3.6
fork shark jaw

shark jaw (3.1) with clamp forks on top, which have clamping devices inside that can seize the lock

chains or steel wire rope clips, and with a cylindrical under part enabling a vertical slice movement

within the support box (3.3)

Note 1 to entry: The clamping device on the clamp fork of a fork shark jaw can be replaced to adapt to different

types of steel wire ropes or lock chains for fixture.
3.7
triplex shark jaw
shark jaw (3.1) with two independently rev
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 24041
ISO/TC 8/SC 4
Ships and marine technology — Shark
Secretariat: SAC
jaws and towing pins
Voting begins on:
2020­09­14
Voting terminates on:
2020­11­09
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 24041:2020(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 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 24041:2020(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
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 24041:2020(E)
Contents Page

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

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

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

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

4 Types ................................................................................................................................................................................................................................. 2

4.1 Types of shark jaws ............................................................................................................................................................................. 2

4.2 Structural form of shark jaws and towing pins ........................................................................................................... 2

5 Design .............................................................................................................................................................................................................................. 3

5.1 Material stresses .................................................................................................................................................................................... 3

5.2 Basic calculation .................................................................................................................................................................................... 4

5.3 Shark jaw design .................................................................................................................................................................................... 5

5.4 Towing pin design ................................................................................................................................................................................ 5

5.5 Support box design .............................................................................................................................................................................. 5

5.6 Lubrication design ............................................................................................................................................................................... 5

5.7 Auxiliary equipment ........................................................................................................................................................................... 5

5.8 Working time control ........................................................................................................................................................................ 6

5.9 Emergency release ............................................................................................................................................................................... 6

6 Performance specifications ....................................................................................................................................................................... 6

6.1 Load requirements .............................................................................................................................................................................. 6

6.2 Working time ............................................................................................................................................................................................ 7

7 Acceptance tests .................................................................................................................................................................................................... 7

7.1 General requirement .......................................................................................................................................................................... 7

7.2 Operation without load ................................................................................................................................................................... 7

7.3 Operation under load ........................................................................................................................................................................ 7

7.4 Control system utility test ............................................................................................................................................................. 8

7.5 Emergency release test .................................................................................................................................................................... 8

7.6 Waterproof test ....................................................................................................................................................................................... 8

8 Designation system ............................................................................................................................................................................................ 8

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 24041:2020(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 8, Ships and marine technology,

Subcommittee SC 4, Outfitting and deck machinery.

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
---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 24041:2020(E)
Ships and marine technology — Shark jaws and towing pins
1 Scope

This document specifies requirements for the design, operation, performance and acceptance tests of

marine shark jaws and towing pins having electric, hydraulic, diesel or steam drive.

It is applicable to the design, manufacture and acceptance of marine shark jaws and towing pins.

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 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary and symbols

ISO 7365, Shipbuilding and marine structures — Deck machinery — Towing winches for deep sea use

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 3828 and the following 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
shark jaw
equipment for temporarily securing the inboard end of a towline

Note 1 to entry: A left-hand shark jaw is a shark jaw placed on the left-hand side of the central axis of the towing

pins (3.2) when looking at the bow from the stern of a ship.

Note 2 to entry: A right-hand shark jaw is a shark jaw placed on the right-hand side of the central axis of the

towing pins (3.2) when looking at the bow from the stern of a ship.

Note 3 to entry: A central shark jaw is a shark jaw placed on the central axis of the towing pins (3.2) when looking

at the bow from the stern of a ship.
3.2
towing pin
equipment for leading and restraining a towline to the intended path
3.3
support box
device fixing and supporting the shark jaw (3.1) and towing pins (3.2)
3.4
working height

maximum height from a towline to the board, when shark jaws (3.1) or towing pins (3.2) operate

normally
© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/FDIS 24041:2020(E)
3.5
emergency release

release and withdrawal actions of a shark jaw (3.1) and towing pins (3.2) depending on standby power

under loss of driving power or in emergency
3.6
fork shark jaw

shark jaw (3.1) with clamp forks on top, which have clamping devices inside that can seize the lock

chains or steel wire rope clips, and with a cylindrical under part enabling a vertical slice movement

within the suppor
...

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